CN116492588A - A method and device for detecting the position of a ventricular catheter pump - Google Patents

Abstract

The embodiment of the invention provides a position detection method and device of a ventricular catheter pump, which relate to the technical field of medical equipment, wherein the ventricular catheter pump is integrated with a positioning component, and the positioning component is used for acquiring position information of the ventricular catheter pump, and the method comprises the following steps: determining a current sequence comprising the current of the ventricular catheter pump at each instant in the target time period, and determining a pressure sequence comprising the heart pressure of the target subject at each instant in the target time period; calculating a first region of the ventricular catheter pump in the heart of the target subject based on the current sequence and the pressure sequence; acquiring the position information acquired by the positioning component at each moment in the target time period, and determining that the ventricular catheter pump is positioned in a second area of the heart of the target object based on the acquired position information; based on the first region, the second region, a target position of the ventricular catheter pump is calculated. By applying the scheme provided by the embodiment, the position of the ventricular catheter pump can be accurately detected.

Description

A method and device for detecting the position of a ventricular catheter pump

technical field

The invention relates to the technical field of medical devices, in particular to a method and device for detecting the position of a ventricular catheter pump.

Background technique

Ventricular catheter pumps are intravascular miniature axial flow pumps used to support the patient's circulatory system. Taking the left ventricular catheter pump as an example, when the left ventricular catheter pump is in the correct position, such as the blood inlet of the left ventricular catheter pump needs to be located in the left ventricle, and the outflow port of the left ventricular catheter pump needs to be located in the aorta, the left ventricular catheter pump can smoothly assist the heart to pump blood.

If the ventricular catheter pump is in an incorrect position, such as the inlet and outlet of the ventricular catheter pump are located in the aorta or the left ventricle at the same time, it is difficult for the ventricular catheter pump to achieve the auxiliary function of pumping blood. Therefore, there is an urgent need for a position detection solution for a ventricular catheter pump.

Contents of the invention

The purpose of the embodiments of the present invention is to provide a method and device for detecting the position of a ventricular catheter pump, so as to accurately detect the position of the ventricular catheter pump. The specific technical scheme is as follows:

In a first aspect, an embodiment of the present invention provides a method for detecting the position of a ventricular catheter pump, the ventricular catheter pump is integrated with a positioning component, and the positioning component is used to collect position information of the ventricular catheter pump, the method comprising:

Determine the current sequence including the current of the ventricular catheter pump at each moment in the target time period, and determine the pressure sequence including the heart pressure of the target subject at each moment in the target time period, wherein the target time period is; the current moment Extending a preset period of time before, the target subject is a subject implanted with the ventricular catheter pump;

calculating a first region where the ventricular catheter pump is located in the target subject's heart based on the current sequence and the pressure sequence;

Obtaining the position information collected by the positioning component at each moment within the target time period, and based on the acquired position information, determine that the ventricular catheter pump is located in a second region of the heart of the target subject;

Based on the first area and the second area, a target position of the ventricular catheter pump is calculated.

In an embodiment of the present invention, the above pressure sequence is collected by a pressure sensor located on the preset component of the ventricular catheter pump, and based on the current sequence and pressure sequence, the calculation of the position of the ventricular catheter pump at the target The first area in the subject's heart, including:

determining that a predetermined component of the ventricular catheter pump is located in a third region of the target subject's heart based on the pressure sequence;

calculating the correlation between the current sequence and the pressure sequence;

Based on the degree of correlation and the third region, it is determined that the ventricular catheter pump is located in a first region of the target subject's heart.

In an embodiment of the present invention, the calculation of the first region where the ventricular catheter pump is located in the heart of the target subject based on the current sequence and the pressure sequence includes:

For the current at each moment included in the current sequence, calculate the rate of change of the current at this moment based on the current at this moment and the current at an adjacent moment at this moment;

adjusting the currents included in the current sequence based on the calculated rate of change of the currents;

For the pressure at each moment included in the pressure sequence, based on the pressure at this moment and the pressures at adjacent moments at this moment, calculate the rate of change of the pressure at this moment;

adjusting pressures included in the pressure sequence based on the calculated rate of change of pressure;

Based on the adjusted current sequence and the adjusted pressure sequence, a first region where the ventricular catheter pump is located in the target subject's heart is calculated.

In an embodiment of the present invention, the above-mentioned adjustment of the current contained in the current sequence based on the calculated rate of change of the current includes:

judging whether the calculated rate of change of the current is greater than a preset current rate of change threshold;

If yes, for the calculated rate of change of each current, perform feature extraction on the current rate of change sequence including the rate of change of the current to obtain the first eigenvalue of the current rate of change sequence, based on the first feature value, adjust the rate of change of the current, and adjust the current included in the current sequence based on the adjusted rate of change of the current, wherein the sequence of the rate of change of the current also includes: the current corresponding to the current in the current sequence The rate of change of the current at the first preset number of adjacent moments of the moment;

If not, adjusting the currents included in the current sequence based on the calculated rate of change of the currents.

In an embodiment of the present invention, the above-mentioned adjustment of the pressure included in the pressure sequence based on the calculated rate of change of the pressure includes:

judging whether the calculated pressure change rate is greater than a preset pressure change rate threshold;

If yes, for the calculated rate of change of each pressure, perform feature extraction on the pressure rate of change sequence including the rate of change of the pressure to obtain the second eigenvalue of the pressure rate of change sequence, based on the second feature value, adjust the rate of change of the pressure, and adjust the pressure included in the pressure sequence based on the adjusted rate of change of the pressure, wherein the pressure change rate sequence also includes the first time in the pressure sequence at the time corresponding to the pressure 2. The rate of change of the pressure at a preset number of adjacent moments;

If not, the pressures included in the pressure sequence are adjusted based on the calculated rate of change of the pressures.

In a second aspect, an embodiment of the present invention provides a position detection device for a ventricular catheter pump, the ventricular catheter pump is integrated with a positioning component, and the positioning component is used to collect position information of the ventricular catheter pump, the device includes:

An information determination module, configured to determine a current sequence including the current of the ventricular catheter pump at each moment in the target time period, and determine a pressure sequence including the heart pressure of the target subject at each moment in the target time period, wherein the target The time period is: a time period extending a preset duration before the current moment, and the target object is the object implanted with the ventricular catheter pump;

A first area calculation module, configured to calculate a first area where the ventricular catheter pump is located in the heart of the target subject based on the current sequence and the pressure sequence;

The second area calculation module is configured to obtain the location information collected by the positioning component at each moment within the target time period, and determine the first location where the ventricular catheter pump is located in the heart of the target subject based on the obtained location information. Second area;

A position calculation module, configured to calculate the target position of the ventricular catheter pump based on the first area and the second area.

In an embodiment of the present invention, the above-mentioned pressure sequence is collected by a pressure sensor located on a preset component of the ventricular catheter pump, and the first area calculation module is specifically configured to determine the pressure sequence of the ventricle based on the pressure sequence. The preset component of the catheter pump is located in a third region of the heart of the target subject; the correlation between the current sequence and the pressure sequence is calculated; based on the correlation and the third region, the ventricular catheter pump is determined A first region located in the target subject's heart.

In an embodiment of the present invention, the above-mentioned first area calculation module includes:

The first rate-of-change calculation submodule is used to calculate the rate of change of the current at this moment based on the current at this moment and the current at adjacent moments at this moment for the current at each moment included in the current sequence;

A current adjustment submodule, configured to adjust the current included in the current sequence based on the calculated rate of change of the current;

The second rate-of-change calculation submodule is used to calculate the rate of change of the pressure at the moment based on the pressure at the moment and the pressures at the adjacent moments of the moment for the pressure at each moment included in the pressure sequence;

a pressure adjustment submodule, configured to adjust the pressure contained in the pressure sequence based on the calculated rate of change of the pressure;

The area calculation submodule is used to calculate the first area where the ventricular catheter pump is located in the heart of the target subject based on the adjusted current sequence and the adjusted pressure sequence.

In an embodiment of the present invention, the above-mentioned current adjustment sub-module is specifically used to judge whether the calculated rate of change of the current is greater than the preset current rate of change threshold; if yes, for each calculated rate of change of the current, the performing feature extraction on the current rate of change sequence including the rate of change of the current to obtain a first eigenvalue of the current rate of change sequence, based on the first eigenvalue, adjusting the rate of change of the current, and based on the adjusted current rate of change to adjust the current included in the current sequence, wherein the current rate of change sequence also includes: the rate of change of the current at the first preset number of adjacent moments corresponding to the current moment in the current sequence ; If not, adjusting the current included in the current sequence based on the calculated rate of change of the current.

In an embodiment of the present invention, the pressure adjustment submodule is specifically used to judge whether the calculated pressure change rate is greater than the preset pressure change rate threshold; if yes, for each calculated pressure change rate, the performing feature extraction on the pressure change rate sequence including the pressure change rate, obtaining a second eigenvalue of the pressure change rate sequence, based on the second eigenvalue, adjusting the pressure change rate, and based on the adjusted pressure rate of change, adjust the pressure contained in the pressure sequence, wherein the pressure change rate sequence also includes the pressure change rate of the second preset number of adjacent moments corresponding to the pressure in the pressure sequence; if No, the pressures included in the pressure sequence are adjusted based on the calculated rate of change of the pressures.

In a third aspect, an embodiment of the present invention provides an electronic device, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory complete communication with each other through the communication bus;

memory for storing computer programs;

The processor is configured to implement the method steps described in the first aspect above when executing the program stored in the memory.

In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the method steps described in the above-mentioned first aspect are implemented. .

It can be seen from the above that, applying the solution provided by the embodiment of the present invention, since the target position of the ventricular catheter pump is calculated based on the first area and the second area, the second area is based on the position information collected by the integrated positioning component of the ventricular catheter pump It is determined that the position information collected by the positioning component is relatively accurate, so that the accuracy of the position of the second region including the ventricular catheter pump is relatively high. On this basis, the calculation is combined with the operating characteristics of the ventricular catheter pump and the physiological characteristics of the heart The first area, the first area specifically considers the operating scenarios of the ventricular catheter pump. Therefore, combining the first area and the second area can improve the accuracy of detecting the position of the ventricular catheter pump.

Of course, implementing any product or method of the present invention does not necessarily need to achieve all the above-mentioned advantages at the same time.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application, and those skilled in the art can also obtain other embodiments according to these drawings.

Fig. 1 is a schematic structural diagram of a ventricular catheter pump provided by an embodiment of the present invention;

FIG. 2 is a schematic flowchart of a first method for detecting the position of a ventricular catheter pump provided by an embodiment of the present invention;

3 is a schematic flowchart of a second method for detecting the position of a ventricular catheter pump provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of the first position detection device for a ventricular catheter pump provided by an embodiment of the present invention;

5 is a schematic structural diagram of a second ventricular catheter pump position detection device provided by an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art based on the present application belong to the protection scope of the present invention.

Before introducing various embodiments of the present invention, the ventricular catheter pump provided by the present invention will be introduced with reference to the following FIG. 1 .

Fig. 1 shows a schematic structural diagram of a ventricular catheter pump, including a fixed pigtail tube 106, a blood inflow port 105, a blood flow channel 104, a blood outflow port 103, a motor housing 102 and a catheter 101, and the motor housing 102 is connected in sequence. A motor is installed inside, and the rotating shaft of the motor passes through the motor housing, and the axial flow impeller inside the blood flow channel 104 is fixedly connected.

The motor drives the axial flow impeller to rotate. Under this driving action, the blood in the heart flows in from the blood inlet 105, passes through the blood flow channel 104, and flows out from the blood outlet 103. Based on this, in order to reduce the left ventricular load of patients with heart failure, To help the heart pump blood, the blood inlet needs to be in the left ventricle and the blood outlet needs to be in the aorta.

In the present invention, besides the above-mentioned structure, the ventricular catheter pump also integrates a positioning component. The above-mentioned positioning component can be an ultrasonic probe, a magnetic sensor, an electrode, etc., and the above-mentioned positioning component can cooperate with an external receiver to realize the function of collecting position information.

The above-mentioned positioning component can be integrated into one or more structures included in the ventricular catheter pump, such as pigtail tube, blood inlet, blood flow channel, blood outlet, motor housing, catheter, guide wire and so on.

The execution subject of each embodiment of the present invention may be a controller of the ventricular catheter pump, and the controller is used for detecting relevant parameters of the ventricular catheter pump/patient and controlling the operation of the ventricular catheter pump system.

When the ventricular catheter pump is implanted into the patient's heart, the ventricular catheter pump is first implanted into the heart through the guide wire of the ventricular catheter pump. After the ventricular catheter pump is located in the heart, the ventricular catheter pump starts to run to assist the heart to pump blood. Based on this process, the application scenarios of the positioning solution/device provided by the present invention can be the following two scenarios:

1. The application scenario of using a guide wire to implant a ventricular catheter pump into the heart.

In this process, the positioning component can be integrated on the guide wire, so that the positioning method provided by the present invention can be used to track the ventricular catheter pump in real time, so as to improve implantation efficiency and accuracy.

2. The application scenario of the whole process of assisting the heart to pump blood after the ventricular catheter pump is implanted in the heart.

In this process, the positioning component can be integrated into the blood inlet port, the blood outlet port, the catheter, etc. in the ventricular catheter pump.

Referring to FIG. 2 , FIG. 2 is a schematic flowchart of a first method for detecting the position of a ventricular catheter pump provided by an embodiment of the present invention. The above method includes the following steps S201 - S204 .

Step S201: Determine the current sequence including the current of the ventricular catheter pump at each moment in the target time period, and determine the pressure sequence including the heart pressure of the target subject at each moment in the target time period.

The above-mentioned target time period is: a time period extending a preset duration before the current moment, the above-mentioned preset duration is a preset duration, and the above-mentioned preset duration can be 5 minutes, 10 minutes, 20 minutes, etc. An example is used to illustrate the above target time period. If the current time is 10:00 am and the preset duration is 10 minutes, then the above target time period is: 9:50-10:00.

The target subject mentioned above is a subject implanted with a ventricular catheter pump.

The current sequence represents the change of the current of the ventricular catheter pump within the target time period. The currents contained in the above current sequence can be arranged in the order of the corresponding time of each current included; the pressure sequence represents the change of the ventricular catheter pump within the target time period. The changes of the pressure, the pressure contained in the above pressure sequence may be arranged according to the sequence of the time corresponding to each pressure contained.

When the ventricular catheter pump is running, the current and heart pressure of the ventricular catheter pump can be collected in real time, and the collected information can be stored in the memory. When locating the ventricular catheter pump, the stored information can be read from the memory. Specifically, when the above information is stored, the above information can be stored in the order of the information collection time. Based on this, the stored information can be Read the current sequence and pressure sequence corresponding to the target time period.

Step S202: Based on the current sequence and the pressure sequence, calculate the first area where the ventricular catheter pump is located in the target subject's heart.

When calculating the first area, feature extraction can be performed on the current sequence and the pressure sequence to obtain the current feature and pressure feature, and input the current feature and pressure feature into the pre-trained position estimation model to obtain the output of the position estimation model The area position information of the area, and the area formed by the above area position information is determined as the first area.

The above position estimation model is based on the sample current characteristics and sample pressure characteristics as training samples in advance, and the actual area where the sample ventricular catheter pump is located in the patient's heart is used as the training reference to train the initial neural network model, and is used to estimate the position of the ventricular catheter pump. Regional location information. The sample current signature is a current signature of a sample current sequence comprising current of a sample ventricular catheter pump, and the sample pressure signature is a pressure signature of a sample pressure sequence comprising cardiac pressure of the patient's heart.

Since the first area is calculated based on the current sequence and the pressure sequence, the current sequence characterizes the motor characteristics of the ventricular catheter pump, and the pressure sequence characterizes the physiological characteristics of the patient's heart, combined with the motor characteristics of the ventricular catheter pump and the physiological characteristics of the patient's heart Features, comprehensively calculate the area where the ventricular catheter pump is located, the first area calculated in this way integrates the application scenario of the ventricular catheter pump, and specifically considers the operating performance of the ventricular catheter pump scenario, which improves the accuracy of the position detection of the ventricular catheter pump.

Step S203: Obtain the location information collected by the positioning component at each moment within the target time period, and based on the obtained location information, determine the second region where the ventricular catheter pump is located in the heart of the target subject.

The above-mentioned ventricular catheter pump is integrated with a positioning component, and the positioning component is used to collect position information of the ventricular catheter pump.

When determining the second area, the average value of the position information collected by the positioning component can be calculated, the above average value is determined as the center position of the area where the ventricular catheter pump is located, and the center position is extended to a preset length in each direction to obtain the ventricular catheter The pump is located in the second area of the subject's heart.

Since the location information collected by the positioning component is used to determine the second area, and the positioning component itself is used to collect the location information, the accuracy of the determined second area is relatively high.

Step S204: Calculate the target position of the ventricular catheter pump based on the first area and the second area.

When calculating the target position of the ventricular catheter pump, the overlapping area between the first area and the second area can be determined as the area where the ventricular catheter pump is located, and the area containing the first area and the second area can also be determined as the ventricular catheter For the region where the pump is located, the determined position parameter values of the above region are determined as the target position of the ventricular catheter pump. The above position parameter values may include the center position of the region, the positions of the vertices, and the relative position to the heart.

It can be seen from the above that, applying the solution provided by this embodiment, since the target position of the ventricular catheter pump is calculated based on the first area and the second area, the second area is determined based on the position information collected by the integrated positioning component of the ventricular catheter pump Yes, the location information collected by the positioning component is relatively accurate, so that the accuracy of the second area including the location of the ventricular catheter pump is relatively high. One area, the first area specifically considers the operating scenarios of the ventricular catheter pump. Therefore, combining the first area and the second area can improve the accuracy of detecting the position of the ventricular catheter pump.

Moreover, in this embodiment, only the current information of the ventricular catheter pump, the pressure information of the heart of the target object, and the position information collected by the positioning component are used, and there is no need to use X-rays and other equipment that are harmful to human radiation. information. Therefore, adopting the solution provided by this embodiment can improve the safety of detecting the position of the ventricular catheter pump.

In the aforementioned step S202 of the embodiment corresponding to FIG. 2 , in addition to determining the first region in the manner mentioned above, it can also be implemented according to steps S302-S306 of the embodiment corresponding to FIG. 3 described below. Based on this, in an embodiment of the present invention, refer to FIG. 3 , which is a schematic flowchart of a second method for detecting the position of a ventricular catheter pump provided by an embodiment of the present invention. The above method includes the following steps S301-S308.

Step S301: Determine the current sequence including the current of the ventricular catheter pump at each moment in the target time period, and determine the pressure sequence including the heart pressure of the target subject at each moment in the target time period.

The above-mentioned target time period is; a time period extended by a preset duration before the current moment. The target subject is a subject implanted with a ventricular catheter pump.

The above step S301 is the same as the above step S201, and will not be described in detail here.

Step S302 : For the current at each time included in the current sequence, calculate the rate of change of the current at the time based on the current at the time and the current at the time adjacent to the time.

The aforementioned adjacent time may be an adjacent time before this time, or an adjacent time after this time, or may be an adjacent time before or after this time, which is not limited.

The above-mentioned rate of change of the current represents the relative change of the current at each moment. When calculating the rate of change of the current, the current difference between the current and the current at adjacent moments can be calculated, and the ratio between the current difference and the preset unit time can be used as the rate of change of the current. The aforementioned preset unit time may be 1s.

Step S303: Adjust the current included in the current sequence based on the calculated rate of change of the current.

Because the rate of change of the current can reflect the deep information of the current change of the ventricular catheter pump. The in-depth information of the above-mentioned current changes may include the current deviation caused by the contact between the ventricular catheter pump and the body tissue of the target object, the current deviation caused by the body movement of the target object, the detection error of the current detection component itself, and the like. Using the above-mentioned rate of change of the current, the current sequence can be accurately adjusted.

When adjusting the current included in the current sequence, in an implementation manner, the current at a corresponding time included in the current sequence may be adjusted for each rate of change of the current.

For example, for each moment in the target time period, the product of the rate of change corresponding to the moment and the preset adjustment coefficient can be calculated, and the current at the moment can be updated based on the calculated product, such as calculating the ratio between the above product and the original current sum/difference.

In another embodiment, the eigendecomposition of the matrix formed by the calculated rate of change can be performed to obtain the eigenvalue of the rate of change as the current change range, and determine the first target change in the calculated rate of change that is smaller than the above-mentioned current change range For each of the above-mentioned first target rate of change, the current at the corresponding moment is adjusted.

Step S304: For the pressure at each moment included in the pressure sequence, calculate the rate of change of the pressure at the moment based on the pressure at the moment and the pressures at adjacent moments of the moment.

The aforementioned adjacent time may be an adjacent time before this time, or an adjacent time after this time, or may be an adjacent time before or after this time, which is not limited.

The above-mentioned rate of change of pressure represents the relative change of pressure at each moment. When calculating the rate of change of the pressure, the current difference between the pressure and the pressure at the adjacent moment can be calculated, and the ratio between the current difference and the preset unit time can be used as the rate of change of the pressure. The aforementioned preset unit time may be 1s.

Step S305: Adjust the pressure included in the pressure sequence based on the calculated rate of change of the pressure.

Because the rate of change of pressure can reflect the deep information of the pressure change of the ventricular catheter pump. The above-mentioned in-depth information on pressure changes may include pressure deviation caused by contact between the ventricular catheter pump and the body tissue of the target object, pressure deviation caused by body movement of the target object, detection error of the pressure detection component itself, and the like. Using the above-mentioned rate of change of pressure, the pressure sequence can be adjusted accurately.

When adjusting the current included in the pressure sequence, in one embodiment, the pressure at the corresponding moment included in the pressure sequence may be adjusted for each pressure change rate.

For example, for each moment in the target time period, the product of the rate of change corresponding to that moment and the preset adjustment coefficient can be calculated, and the pressure at that moment can be updated based on the calculated product, such as calculating the ratio between the above product and the original pressure sum/difference.

In another embodiment, the eigendecomposition of the matrix formed by the calculated change rate can be performed to obtain the eigenvalue of the change rate as the pressure change range, and determine the second target change in the calculated change rate that is smaller than the above-mentioned pressure change range For each of the above-mentioned second target rate of change, the pressure at the corresponding moment is adjusted.

Step S306: Based on the adjusted current sequence and the adjusted pressure sequence, calculate the first region where the ventricular catheter pump is located in the heart of the target subject.

When calculating the first area, feature extraction can be performed on the adjusted current sequence, and feature extraction can be performed on the adjusted pressure sequence, and the extracted features can be input into the aforementioned position estimation model to obtain the area position information output by the position estimation model , determining the area formed by the above area location information as the first area.

Step S307: Obtain the location information collected by the positioning component at each moment in the target time period, and based on the obtained location information, determine the second region where the ventricular catheter pump is located in the heart of the target subject.

Step S308: Calculate the target position of the ventricular catheter pump based on the first area and the second area.

The above steps S307-S308 are the same as the above steps S203-S204, and will not be described in detail here.

It can be seen from the above that, applying the scheme provided by this embodiment, since the first region is determined based on the adjusted current sequence and pressure sequence, the adjusted current sequence uses the rate of change that characterizes the change of the current sequence to adjust the current sequence Yes, the adjusted pressure sequence is adjusted by using the rate of change that characterizes the change of the pressure sequence. Therefore, when determining the first area, not only the superficial information of the current sequence and the pressure sequence are considered, but also the circuit sequence and the pressure sequence are deeply excavated to determine the deep layer information changes of the current sequence and the pressure sequence within the target time period. Information, the surface information and the deep information are combined to determine the first area, thereby improving the accuracy of determining the first area.

In step S303 of the above-mentioned embodiment corresponding to FIG. 3 , in addition to adjusting the current included in the current sequence in the manner mentioned above, it can also be implemented according to the following steps A1-A3.

Step A1: Determine whether the calculated rate of change of the current is greater than a preset threshold value of the rate of change of the current. If yes, execute step A2; if no, execute step A3.

Step A2: For the calculated rate of change of each current, perform feature extraction on the current rate of change sequence including the rate of change of the current, obtain the first eigenvalue of the current rate of change sequence, and based on the first eigenvalue, extract the current The rate of change of the current is adjusted, and the current included in the current sequence is adjusted based on the adjusted rate of change of the current.

Since this step A2 is performed when the change rate is greater than the preset current change rate threshold, that is, when the current change rate is too large, this step is executed. Therefore, in this embodiment, the situation that the rate of change of the current is too large is limited, so that when the current sequence is adjusted based on the rate of change of the adjusted current, the situation of extreme data in the adjusted current sequence can be avoided, thereby improving the Adjust data stability.

The aforementioned current change rate sequence further includes: the current change rate of the first preset number of adjacent moments corresponding to the current moment in the current sequence. The above-mentioned first preset number may be 10, 20 and so on. The rate of change included in the sequence of rate of change of current may be arranged according to the sequence of the moment when each rate of change corresponds to the current.

For example: the time corresponding to the current target current is 10:00, and the change rate corresponding to this current is a1, each current contained in the current sequence has a corresponding time, and it is necessary to determine the 10 currents in the current sequence whose time is 10:00 The rate of change of current at adjacent moments can determine the rate of change of current at 5 adjacent moments before 10:00 (such as a2, a3, a4, a5, a6), and determine the rate of change of current at 5 adjacent moments after 10:00. The rate of change of the current (such as a7, a8, a9, a10, a11), the sequence of the rate of change of the current obtained in this way is: (a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11) .

The above-mentioned first characteristic value can reflect the characteristics of the approaching rate of change including the rate of change of the current target current. Any feature extraction method in the prior art may be used to perform feature extraction on the above-mentioned current change rate sequence.

When adjusting the rate of change of the current, in an implementation manner, the product of the above-mentioned first characteristic value and the preset rate-of-change adjustment coefficient may be calculated, and the calculated product may be determined as the adjusted rate of change.

In another implementation manner, the rate of change of the current can be adjusted according to the following expression:

;

in, is the rate of change of the current before adjustment, /> is the rate of change of the adjusted current, /> is the mean value of the current change rate series, /> is the first eigenvalue, /> is the first preset coefficient, /> is the second preset coefficient. where /> The value of can be 0.5~1, /> The value can be 1~1.5.

Step A3: Adjust the currents included in the current sequence based on the calculated rate of change of the currents.

Since this step A3 is performed when the change rate is less than or equal to the preset current change rate threshold, that is, when the current change rate is relatively stable, this step is executed. Therefore, in this embodiment, the calculated current change rate is directly used to adjust the current sequence, and the current sequence can be adjusted by using the change of the current sequence represented by the current change rate, thereby improving the adjustment accuracy.

When adjusting the current included in the current sequence, the current included in the above-mentioned current sequence may be adjusted according to the method adopted in the aforementioned step S303 , which will not be described in detail here.

It can be seen that in this embodiment, on the one hand, the rate of change of the current is limited when the rate of change of the current is too large, and the sequence characteristics of the change rate sequence including the rate of change of the current are used for adjustment. The sequence characteristics associated with the rate of change of the current can ensure the accuracy of the adjustment of the rate of change of the current. In this way, when the current sequence is adjusted based on the rate of change of the adjusted current, the situation of extreme data in the adjusted current sequence can be avoided, thereby improving In order to adjust the stability of the data; on the other hand, when the rate of change of the current is relatively stable, the calculated current rate of change can be directly used to adjust the current sequence, and the change of the current sequence represented by the rate of change of the current can be used to determine the stability of the current sequence. The current sequence is adjusted to improve the accuracy of the adjustment.

In step S305 of the above-mentioned embodiment corresponding to FIG. 3 , in addition to adjusting the pressure contained in the pressure sequence in the manner mentioned above, it can also be implemented according to the following steps B1-B3.

Step B1: judging whether the calculated pressure change rate is greater than a preset pressure change rate threshold. If yes, execute step B2; if no, execute step B3.

Step B2: For the calculated rate of change of each pressure, perform feature extraction on the pressure rate of change sequence including the rate of change of the pressure to obtain the second eigenvalue of the pressure change rate sequence, and based on the second eigenvalue, the pressure The rate of change of the pressure is adjusted, and the pressure included in the pressure sequence is adjusted based on the rate of change of the adjusted pressure.

Since this step B2 is performed when the rate of change of the pressure is greater than the preset threshold value of the rate of change of the pressure, that is, when the rate of change of the pressure is too large, this step is executed. Therefore, in this embodiment, the pressure change rate is limited, and the pressure change rate is adjusted by using the associated sequence characteristics of the pressure change rate to ensure the accuracy of the pressure change rate adjustment. In this way, based on the adjusted The pressure change rate adjusts the pressure contained in the pressure sequence, which can improve the stability of the data adjustment.

The pressure change rate sequence further includes: the pressure change rate of a second preset number of adjacent moments corresponding to the moment in the pressure sequence. The above-mentioned second preset number may be 10, 20 and so on. The change rates included in the pressure change rate sequence may be arranged in the order of the time when each change rate corresponds to the pressure.

For example: the time corresponding to the current pressure is 10:30, the change rate corresponding to this pressure is b1, each pressure contained in the pressure sequence has a corresponding time, and it is necessary to determine the 10 pressure sequences with the time of 10:30 The rate of change of pressure at adjacent moments can determine the rate of change of pressure at 5 adjacent moments before 10:30 (such as b2, b3, b4, b5, b6), and determine the rate of change of pressure at 5 adjacent moments after 10:30. The rate of change of pressure (such as b7, b8, b9, b10, b11), the obtained pressure change rate sequence is: (b1, b2, b3, b4, b5, b6, b7, b8, b9, b10, b11) .

The above-mentioned second characteristic value can reflect the characteristics of the approaching rate of change including the rate of change of the current target pressure. Any feature extraction method in the prior art may be used to perform feature extraction on the above pressure change rate series.

When adjusting the rate of change of the pressure, in an embodiment, the product of the second characteristic value and the preset rate of change adjustment coefficient may be calculated, and the calculated product may be determined as the adjusted rate of change.

In another embodiment, the rate of change of pressure can be adjusted according to the following expression:

;

in, is the rate of change of pressure before adjustment, /> is the rate of change of the adjusted pressure, /> is the mean value of the pressure change rate series, /> is the second eigenvalue, /> is the third preset coefficient, /> is the fourth preset coefficient. in The value of can be 0.5~1, /> The value can be 1~1.5.

Step B3: Adjusting the pressures included in the pressure sequence based on the calculated rate of change of pressure.

Since this step B3 is performed when the change rate is less than or equal to the preset pressure change rate threshold, that is, when the pressure change rate is relatively stable, this step is executed. Therefore, in this embodiment, the calculated pressure change rate is directly used to adjust the pressure sequence, and the change of the pressure sequence represented by the pressure change rate can be used to adjust the pressure sequence, thereby improving the adjustment accuracy.

When adjusting the pressure included in the pressure sequence, the pressure included in the above pressure sequence may be adjusted in the manner adopted in the aforementioned step S305, which will not be described in detail here.

It can be seen that in this embodiment, on the one hand, the rate of change of the pressure is limited when the rate of change of the pressure is too large, and the sequence characteristics of the change rate sequence including the rate of change of the pressure are used to make adjustments, based on the relationship with The sequence characteristics associated with the pressure change rate can ensure the accuracy of the pressure change rate adjustment. In this way, when adjusting the pressure sequence based on the adjusted pressure change rate, it can avoid the situation of extreme data in the adjusted pressure sequence, thereby improving In order to adjust the stability of the data; on the other hand, when the pressure change rate is relatively stable, the calculated pressure change rate is directly used to adjust the pressure sequence, and the change of the pressure sequence represented by the pressure change rate can be used to control The pressure sequence is adjusted, thereby improving the accuracy of the adjustment.

In step S202 of the above-mentioned embodiment corresponding to FIG. 2 , in addition to the above-mentioned first area calculation method, it can also be implemented according to the following steps C1-C3. In this embodiment, the pressure sequence is collected by a pressure sensor located on a preset component of the ventricular catheter pump, and the preset component may be a blood inflow inlet, a blood outflow outlet, or a catheter.

Step C1 : Based on the pressure sequence, it is determined that the preset component of the ventricular catheter pump is located in a third region in the heart of the target subject.

In one embodiment, the pressure feature of the above pressure can be extracted, the similarity between the pressure feature and the pressure feature of the preset area can be calculated, and the preset area corresponding to the maximum similarity can be determined as the location where the preset component of the ventricular catheter pump is located. third area. The above-mentioned preset area may include the area of the left ventricle of the heart, the area of the aorta, the area of the right ventricle, the area of the pulmonary artery, and the like.

In another embodiment, the pressure sequence can be statistically analyzed to obtain statistical analysis results, such as calculating the maximum value, minimum value, average value, dispersion, etc. of the pressure sequence, and comparing the statistical analysis results with the target range of the preset area For comparison, the preset area corresponding to the target range containing the above statistical analysis results is determined as the third area where the preset components of the ventricular catheter pump are located.

Step C2: Calculate the degree of correlation between the current sequence and the pressure sequence.

The above correlation degree represents the correlation degree between the current sequence and the pressure sequence. When the correlation degree is larger, it means that there is a strong correlation between the current sequence and the pressure sequence; when the correlation degree is smaller, it means that there is a strong correlation between the current sequence and the pressure sequence. weak correlation.

In an implementation manner, the above-mentioned correlation degree r may be calculated according to the following expression:

;

in, Indicates the current value with sequence number i in the current sequence, /> is the mean value of the current sequence, /> Indicates the pressure value with sequence number i in the pressure sequence, /> is the mean value of the pressure sequence, and n represents the number of current/pressure contained in the current sequence/pressure sequence.

Step C3: Based on the correlation degree and the third area, determine the first area where the ventricular catheter pump is located in the heart of the target subject.

When determining the above first area, in one embodiment, the area where the ventricular catheter pump is located is determined based on the correlation, and the first area is estimated by using the above determined area and the third area.

Specifically, when using the correlation degree to determine the area where the ventricular catheter pump is located, it can be determined whether the correlation degree is greater than the preset correlation degree threshold, and if so, determine that the blood inlet port of the ventricular catheter pump is located in the area of the left ventricle, and the blood outflow port Area within the aorta; if no, make sure the blood inlet and blood outflow ports of the ventricular catheter pump are in the same area. In this case, based on the pre-acquired three-dimensional models of the left ventricle and the aorta of the heart of the target subject, the area position information of the ventricular catheter pump can be determined.

If the preset component is a blood outflow port, when the blood inlet port of the ventricular catheter pump is located in the left ventricle and the blood outflow port is located in the aorta based on the correlation degree, the area determined based on the correlation degree, and The first area where the ventricular catheter pump is located can be estimated from these two types of areas, the third area where the blood outflow port is located; when it is determined based on the correlation degree that the blood inflow port and the outflow port of the ventricular catheter pump are located in the same area, the blood outflow port is located in the left In the case of the third area in the ventricle, then, based on the area determined by the correlation degree and the third area, the area in the left ventricle where the ventricular catheter pump is located can be estimated. For example, the overlapping area of the above two types of areas can be calculated as Determined as the first area, or an area including the above two types of areas is determined as the first area.

It can be seen that in this embodiment, the first area is defined by the correlation degree and the third area. On the one hand, the correlation degree represents the relationship between the current sequence of the ventricular catheter pump and the pressure sequence of the heart within the target time period On the other hand, the third area is determined based on the pressure information collected by the integrated pressure sensor on the ventricular catheter pump preset component. Therefore, combining the above two aspects, the determined first area considers both the current and the pressure. The correlation between them, and at the same time fuse the pressure information collected by the pressure sensor inherited by the preset components, thereby improving the accuracy of the first area.

Corresponding to the above method for detecting the position of the ventricular catheter pump, an embodiment of the present invention further provides a device for detecting the position of the ventricular catheter pump.

Referring to Fig. 4, Fig. 4 is a schematic structural diagram of the first position detection device of a ventricular catheter pump provided by an embodiment of the present invention, the ventricular catheter pump is integrated with a positioning component, and the positioning component is used to acquire the position of the ventricular catheter pump Information, the above means include 401-404.

The information determination module 401 is configured to determine a current sequence including the current of the ventricular catheter pump at each moment in the target time period, and determine a pressure sequence including the cardiac pressure of the target subject at each moment in the target time period, wherein the The target time period is: a time period extending a preset duration before the current moment, and the target object is an object implanted with the ventricular catheter pump;

A first area calculation module 402, configured to calculate a first area where the ventricular catheter pump is located in the heart of the target subject based on the current sequence and the pressure sequence;

The second area calculation module 403 is configured to obtain the location information collected by the positioning component at each moment within the target time period, and determine the position where the ventricular catheter pump is located in the heart of the target subject based on the obtained location information second area;

A position calculation module 404, configured to calculate the target position of the ventricular catheter pump based on the first area and the second area.

It can be seen from the above that, applying the solution provided by this embodiment, since the target position of the ventricular catheter pump is calculated based on the first area and the second area, the second area is determined based on the position information collected by the integrated positioning component of the ventricular catheter pump Yes, the location information collected by the positioning component is relatively accurate, so that the accuracy of the second area including the location of the ventricular catheter pump is relatively high. One area, the first area specifically considers the operating scenarios of the ventricular catheter pump. Therefore, combining the first area and the second area can improve the accuracy of detecting the position of the ventricular catheter pump.

In an embodiment of the present invention, the above-mentioned pressure sequence is collected by a pressure sensor located on a preset component of the ventricular catheter pump, and the first area calculation module is specifically configured to determine the pressure sequence of the ventricle based on the pressure sequence. The preset component of the catheter pump is located in a third region of the heart of the target subject; the correlation between the current sequence and the pressure sequence is calculated; based on the correlation and the third region, the ventricular catheter pump is determined A first region located in the target subject's heart.

It can be seen that in this embodiment, the first area is defined by the correlation degree and the third area. On the one hand, the correlation degree represents the relationship between the current sequence of the ventricular catheter pump and the pressure sequence of the heart within the target time period On the other hand, the third area is determined based on the pressure information collected by the integrated pressure sensor on the ventricular catheter pump preset component. Therefore, combining the above two aspects, the determined first area considers both the current and the pressure. The correlation between them, and at the same time fuse the pressure information collected by the pressure sensor inherited by the preset components, thereby improving the accuracy of the first area.

Referring to FIG. 5, FIG. 5 is a schematic structural diagram of a second ventricular catheter pump position detection device provided by an embodiment of the present invention. The aforementioned FIG. 4 corresponds to the first area calculation module 402 of the embodiment, which may include the following 502-506.

The information determination module 501 is configured to determine a current sequence including the current of the ventricular catheter pump at each moment in the target time period, and determine a pressure sequence including the heart pressure of the target subject at each moment in the target time period, wherein the The target time period is: a time period extending a preset duration before the current moment, and the target object is an object implanted with the ventricular catheter pump.

The foregoing information determination module 501 is the same as the information determination module 401 in the aforementioned embodiment corresponding to FIG. 4 .

The first rate-of-change calculation sub-module 502 is configured to calculate the rate of change of the current at this moment based on the current at this moment and the currents at adjacent moments at this moment for the current at each moment included in the current sequence;

A current adjustment submodule 503, configured to adjust the current included in the current sequence based on the calculated rate of change of the current;

The second rate-of-change calculation sub-module 504 is configured to calculate the rate of change of the pressure at that moment based on the pressure at that moment and the pressures at adjacent moments at that moment for the pressure at each moment included in the pressure sequence;

A pressure adjustment submodule 505, configured to adjust the pressure included in the pressure sequence based on the calculated rate of change of the pressure;

The area calculation sub-module 506 is configured to calculate the first area where the ventricular catheter pump is located in the heart of the target subject based on the adjusted current sequence and the adjusted pressure sequence.

The second area calculation module 507 is configured to obtain the location information collected by the positioning component at each moment within the target time period, and determine the position where the ventricular catheter pump is located in the heart of the target subject based on the obtained location information second area;

A position calculation module 508, configured to calculate the target position of the ventricular catheter pump based on the first area and the second area.

The second area calculation module 507 is the same as the second area calculation module 504 in the embodiment corresponding to FIG. 4; the position calculation module 508 is the same as the position calculation module 508 in the embodiment corresponding to FIG. 4.

It can be seen from the above that, applying the scheme provided by this embodiment, since the first region is determined based on the adjusted current sequence and pressure sequence, the adjusted current sequence uses the rate of change that characterizes the change of the current sequence to adjust the current sequence Yes, the adjusted pressure sequence is adjusted by using the rate of change that characterizes the change of the pressure sequence. Therefore, when determining the first area, not only the superficial information of the current sequence and the pressure sequence are considered, but also the circuit sequence and the pressure sequence are deeply excavated to determine the deep layer information changes of the current sequence and the pressure sequence within the target time period. Information, the surface information and the deep information are combined to determine the first area, thereby improving the accuracy of determining the first area.

In an embodiment of the present invention, the above-mentioned current adjustment sub-module is specifically used to judge whether the calculated rate of change of the current is greater than the preset current rate of change threshold; if yes, for each calculated rate of change of the current, the performing feature extraction on the current rate of change sequence including the rate of change of the current to obtain a first eigenvalue of the current rate of change sequence, based on the first eigenvalue, adjusting the rate of change of the current, and based on the adjusted current rate of change to adjust the current included in the current sequence, wherein the current rate of change sequence also includes: the rate of change of the current at the first preset number of adjacent moments corresponding to the current moment in the current sequence ; If not, adjusting the current included in the current sequence based on the calculated rate of change of the current.

It can be seen that in this embodiment, on the one hand, the rate of change of the current is limited when the rate of change of the current is too large, and the sequence characteristics of the change rate sequence including the rate of change of the current are used for adjustment. The sequence characteristics associated with the rate of change of the current can ensure the accuracy of the adjustment of the rate of change of the current. In this way, when the current sequence is adjusted based on the rate of change of the adjusted current, the situation of extreme data in the adjusted current sequence can be avoided, thereby improving In order to adjust the stability of the data; on the other hand, when the rate of change of the current is relatively stable, the calculated current rate of change can be directly used to adjust the current sequence, and the change of the current sequence represented by the rate of change of the current can be used to determine the stability of the current sequence. The current sequence is adjusted to improve the accuracy of the adjustment.

In an embodiment of the present invention, the pressure adjustment submodule is specifically used to judge whether the calculated pressure change rate is greater than the preset pressure change rate threshold; if yes, for each calculated pressure change rate, the performing feature extraction on the pressure change rate sequence including the pressure change rate, obtaining a second eigenvalue of the pressure change rate sequence, based on the second eigenvalue, adjusting the pressure change rate, and based on the adjusted pressure rate of change, adjust the pressure contained in the pressure sequence, wherein the pressure change rate sequence also includes the pressure change rate of the second preset number of adjacent moments corresponding to the pressure in the pressure sequence; if No, the pressures included in the pressure sequence are adjusted based on the calculated rate of change of the pressures.

It can be seen that in this embodiment, on the one hand, the rate of change of the pressure is limited when the rate of change of the pressure is too large, and the sequence characteristics of the change rate sequence including the rate of change of the pressure are used to make adjustments, based on the relationship with The sequence characteristics associated with the pressure change rate can ensure the accuracy of the pressure change rate adjustment. In this way, when adjusting the pressure sequence based on the adjusted pressure change rate, it can avoid the situation of extreme data in the adjusted pressure sequence, thereby improving In order to adjust the stability of the data; on the other hand, when the pressure change rate is relatively stable, the calculated pressure change rate is directly used to adjust the pressure sequence, and the change of the pressure sequence represented by the pressure change rate can be used to control The pressure sequence is adjusted, thereby improving the accuracy of the adjustment.

Corresponding to the above method for detecting the position of the ventricular catheter pump, an embodiment of the present invention also provides an electronic device.

Referring to FIG. 6, FIG. 6 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention, including a processor 601, a communication interface 602, a memory 603, and a communication bus 604, wherein the processor 601, the communication interface 602, and the memory 603 pass The communication bus 604 completes mutual communication,

Memory 603, used to store computer programs;

The processor 601 is configured to implement the method for detecting the position of the ventricular catheter pump provided by the embodiment of the present invention when executing the program stored in the memory 603 .

The communication bus mentioned in the above electronic device may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (Extended Industry Standard Architecture, EISA) bus or the like. The communication bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.

The communication interface is used for communication between the electronic device and other devices.

The memory may include a random access memory (Random Access Memory, RAM), and may also include a non-volatile memory (Non-Volatile Memory, NVM), such as at least one disk memory. Optionally, the memory may also be at least one storage device located far away from the aforementioned processor.

The above-mentioned processor can be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; it can also be a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

In yet another embodiment provided by the present invention, a computer-readable storage medium is also provided, and a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, it implements the A method for position detection of a ventricular catheter pump.

In yet another embodiment provided by the present invention, a computer program product containing instructions is also provided. When it is run on a computer, the computer implements the method for detecting the position of the ventricular catheter pump provided by the embodiment of the present invention.

It can be seen from the above that, applying the solution provided by this embodiment, since the target position of the ventricular catheter pump is calculated based on the first area and the second area, the second area is determined based on the position information collected by the integrated positioning component of the ventricular catheter pump Yes, the location information collected by the positioning component is relatively accurate, so that the accuracy of the second area including the location of the ventricular catheter pump is relatively high. One area, the first area specifically considers the operating scenarios of the ventricular catheter pump. Therefore, combining the first area and the second area can improve the accuracy of detecting the position of the ventricular catheter pump.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, all or part of the processes or functions according to the embodiments of the present invention will be generated. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server, or data center by wired (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, or a magnetic tape), an optical medium (for example, DVD), or a semiconductor medium (for example, a Solid State Disk (SSD)).

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Each embodiment in this specification is described in a related manner, the same and similar parts of each embodiment can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the embodiments of the apparatus, electronic equipment, and computer-readable storage medium, since they are basically similar to the method embodiments, the description is relatively simple, and for relevant parts, please refer to part of the description of the method embodiments.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims (10)

1. A method of detecting the position of a ventricular catheter pump, wherein the ventricular catheter pump is integrated with a positioning assembly for acquiring position information of the ventricular catheter pump, the method comprising:

determining a current sequence containing the current of the ventricular catheter pump at each moment in a target time period, and determining a pressure sequence containing the heart pressure of a target object at each moment in the target time period, wherein the target time period is; extending a preset time period before the current moment, wherein the target object is an object implanted with the ventricular catheter pump;

calculating a first region of the heart of the target subject in which the ventricular catheter pump is located based on the current sequence and the pressure sequence;

acquiring the position information acquired by the positioning component at each moment in the target time period, and determining that the ventricular catheter pump is positioned in a second area of the heart of the target object based on the acquired position information;

A target position of the ventricular catheter pump is calculated based on the first region and the second region.

2. The method of claim 1, wherein the pressure sequence is acquired by a pressure sensor located on a preset component of the ventricular catheter pump, and wherein calculating a first region of the ventricular catheter pump located in the target subject's heart based on the current sequence and the pressure sequence comprises:

determining, based on the pressure sequence, that a preset component of the ventricular catheter pump is located in a third region in the heart of the target subject;

calculating a correlation between the current sequence and the pressure sequence;

based on the correlation and the third region, a first region in the target subject's heart in which the ventricular catheter pump is located is determined.

3. The method of claim 1, wherein the calculating a first region of the ventricular catheter pump in the heart of the target subject based on the current sequence and the pressure sequence comprises:

calculating a rate of change of the current at each time included in the current sequence based on the current at the time and the current at the time adjacent to the time;

Adjusting the current comprised by the current sequence based on the calculated rate of change of the current;

calculating a rate of change of the pressure at each time included in the pressure sequence based on the pressure at the time and the pressures at adjacent times to the time;

adjusting the pressure comprised by the pressure sequence based on the calculated rate of change of pressure;

based on the adjusted current sequence and the adjusted pressure sequence, a first region of the ventricular catheter pump in the heart of the target subject is calculated.

4. A method according to claim 3, wherein said adjusting the current comprised by said current sequence based on the calculated rate of change of the current comprises:

judging whether the calculated change rate of the current is larger than a preset current change rate threshold value;

if so, for each calculated change rate of the current, performing feature extraction on a current change rate sequence containing the change rate of the current to obtain a first feature value of the current change rate sequence, adjusting the change rate of the current based on the first feature value, and adjusting the current contained in the current sequence based on the adjusted change rate of the current, wherein the current change rate sequence further comprises: the current change rate of a first preset number of adjacent moments corresponding to the current in the current sequence;

If not, adjusting the current contained in the current sequence based on the calculated change rate of the current.

5. The method according to claim 3 or 4, wherein said adjusting the pressure comprised by the pressure sequence based on the calculated rate of change of the pressure comprises:

judging whether the calculated change rate of the pressure is larger than a preset pressure change rate threshold value;

if so, performing feature extraction on a pressure change rate sequence containing the change rate of the pressure according to the calculated change rate of each pressure, obtaining a second feature value of the pressure change rate sequence, adjusting the change rate of the pressure based on the second feature value, and adjusting the pressure contained in the pressure sequence based on the adjusted change rate of the pressure, wherein the pressure change rate sequence also contains the change rates of the pressures at a second preset number of adjacent moments corresponding to the pressure in the pressure sequence;

if not, adjusting the pressure contained in the pressure sequence based on the calculated rate of change of the pressure.

6. A position detection device for a ventricular catheter pump, wherein the ventricular catheter pump is integrated with a positioning assembly for acquiring position information of the ventricular catheter pump, the device comprising:

The information determining module is used for determining a current sequence containing the current of the ventricular catheter pump at each moment in a target time period and determining a pressure sequence containing the heart pressure of the target object at each moment in the target time period, wherein the target time period is; extending a preset time period before the current moment, wherein the target object is an object implanted with the ventricular catheter pump;

a first region calculation module for calculating a first region in the target subject's heart where the ventricular catheter pump is located based on the current sequence and the pressure sequence;

a second region calculation module, configured to acquire position information acquired by the positioning component at each time within the target time period, and determine that the ventricular catheter pump is located in a second region of the heart of the target object based on the acquired position information;

and the position calculation module is used for calculating the target position of the ventricular catheter pump based on the first region and the second region.

7. The apparatus according to claim 6, wherein the pressure sequence is acquired by a pressure sensor located on a preset component of the ventricular catheter pump, the first region calculation module being specifically configured to determine, based on the pressure sequence, that the preset component of the ventricular catheter pump is located in a third region in the heart of the target subject; calculating a correlation between the current sequence and the pressure sequence; based on the correlation and the third region, a first region in the target subject's heart in which the ventricular catheter pump is located is determined.

8. The apparatus of claim 6, wherein the first region calculation module comprises:

a first change rate calculation sub-module for calculating, for each current at each time included in the current sequence, a change rate of the current at that time based on the current at that time and the current at a time adjacent to that time;

a current adjustment sub-module for adjusting the current contained in the current sequence based on the calculated rate of change of the current;

a second change rate calculation sub-module for calculating, for each time of the pressure included in the pressure sequence, a change rate of the pressure at that time based on the pressure at that time and the pressures at adjacent times of the time;

a pressure adjustment sub-module for adjusting the pressure contained in the pressure sequence based on the calculated rate of change of pressure;

and the region calculating sub-module is used for calculating a first region of the heart of the target object, in which the ventricular catheter pump is positioned, based on the adjusted current sequence and the adjusted pressure sequence.

9. The apparatus of claim 8, wherein the device comprises a plurality of sensors,

the current adjustment submodule is specifically configured to determine whether the calculated current change rate is greater than a preset current change rate threshold; if so, for each calculated change rate of the current, performing feature extraction on a current change rate sequence containing the change rate of the current to obtain a first feature value of the current change rate sequence, adjusting the change rate of the current based on the first feature value, and adjusting the current contained in the current sequence based on the adjusted change rate of the current, wherein the current change rate sequence further comprises: the current change rate of a first preset number of adjacent moments corresponding to the current in the current sequence; if not, adjusting the current contained in the current sequence based on the calculated change rate of the current.

10. The device according to claim 8 or 9, wherein,

the pressure adjusting sub-module is specifically configured to determine whether the calculated rate of change of the pressure is greater than a preset pressure rate of change threshold; if so, performing feature extraction on a pressure change rate sequence containing the change rate of the pressure according to the calculated change rate of each pressure, obtaining a second feature value of the pressure change rate sequence, adjusting the change rate of the pressure based on the second feature value, and adjusting the pressure contained in the pressure sequence based on the adjusted change rate of the pressure, wherein the pressure change rate sequence also contains the change rates of the pressures at a second preset number of adjacent moments corresponding to the pressure in the pressure sequence; if not, adjusting the pressure contained in the pressure sequence based on the calculated rate of change of the pressure.