CN105919649B - A kind of telescopiform vascular inner body withdrawing device - Google Patents

Abstract

A telescoping intravascular foreign body removal device, comprising a guide bar, an outer sleeve, an inner sleeve, a balloon, a connector, a wire release mechanism, at least two fiber threads and a rubber connecting coil, the fiber thread is connected to the easy Elbow hose connection. This telescopic intravascular foreign body removal device uses fiber threads to pull the flexible hose and bend it inward, so that the front part of the flexible hose forms a funnel-shaped recess. Under the action of negative pressure, the funnel-shaped recess absorbs foreign objects. , and then pull out the outer sleeve, inner sleeve, and guide bar at the same time, so that the foreign body is gradually taken out. Since there is no need to wrap the foreign body from the outside, the larger foreign body stuck by the blood vessel can be taken out. During the removal process The middle is not easy to fall off, so it is safer and more reliable. When the foreign body is large, gas or liquid can be filled through the second port to inflate the balloon, thereby dilating the blood vessel, preventing the foreign body from scratching the blood vessel and making the removal of the foreign body smoother. , but also to dredge the blood vessels.

Description

A telescoping intravascular foreign body removal device

technical field

The invention relates to a device for taking out a foreign body in a blood vessel, in particular to a telescoping type device for taking out a foreign body in a blood vessel.

Background technique

Clinically, in the case of vascular obstruction, sometimes it is necessary to expand the blood vessel with a balloon, and then use a vascular stent to prop up the blocked part of the blood vessel to keep the blood vessel open, but the vascular stent is easy to fall off or fall during the removal process , remains in the blood vessel, which is the main cause of another blood vessel blockage.

In addition, with the growth of age and the aging of blood vessels, thrombus will form in the blood and remain in the blood vessels, which is also the main cause of blood vessel blockage.

The above-mentioned vascular stents and thrombus are all foreign bodies remaining in the blood vessels, which need to be removed in time, otherwise they will cause blood vessel blockage and endanger life.

At present, the method of removing the residual foreign matter in the blood vessel is mainly to use a wire basket guide wire to extend the wire basket guide wire into the residual foreign body in the blood vessel, expand the front end of the wire basket guide wire, wrap the foreign body around the outside, and then pull it out Guide wire, so as to remove the foreign body remaining in the blood vessel.

The above-mentioned method of removing foreign matter in blood vessels with the basket guide wire requires that the foreign matter must be smaller than the inner diameter of the blood vessel. The foreign body is wrapped around the foreign body from the outside, therefore, the method of the wire basket guide wire cannot remove the foreign body stuck by the blood vessel. In addition, the basket guide wire is wrapped from the outside, and the wrapping force is insufficient, or only a small part is wrapped. During the process of pulling out, foreign objects are easy to fall off from the basket guide wire and continue to remain in the blood vessel. Therefore, this method of removing residual foreign bodies in blood vessels with a basket guide wire not only has its application limit, but also is not very reliable.

Contents of the invention

The technical problem to be solved by the present invention is to provide a telescoping intravascular foreign body removal device, which can not only dilate blood vessels, but also safely and reliably remove intravascular foreign bodies, so that blood vessels of patients can be unblocked. The technical scheme adopted is as follows:

A telescoping intravascular foreign body removal device is characterized in that it includes a guide strip, an outer cannula, an inner cannula, a balloon, a connecting piece, a wire release mechanism, at least two fiber threads and a rubber connecting coil, and the inner cannula is in the In the outer sleeve, there is a gap between the inner sleeve and the outer sleeve, and the front end of the inner sleeve protrudes outside the outer sleeve; the balloon is fixedly connected between the front end of the outer sleeve and the front end of the inner sleeve; At the rear end of the tube, the connector is provided with a first port and a second port, the first port communicates with the cavity of the inner sleeve, between the inner surface of the outer sleeve and the outer surface of the inner sleeve, and between the outer surface of the inner sleeve and the inner surface of the balloon. A gas channel is formed between the surfaces, and the second port communicates with the gas channel; the fiber thread is drawn out from the wire-releasing mechanism, the fiber thread is penetrated from the rear end of the inner casing and drawn out from the front end of the inner casing, and the fiber thread is connected with the rubber coil; The front end of the casing is also provided with a flexible hose; the rubber connecting coil is connected with the inner surface of the flexible hose.

The above-mentioned front end refers to the end punctured into the patient's blood vessel, and the above-mentioned rear end refers to the end exposed outside the patient's body.

When there is a foreign body in the patient's blood vessel, first puncture the patient's blood vessel through the guide strip, so that the front end of the guide strip reaches the position of the foreign body, and then connect the rubber connecting coil with the inner surface of the flexible hose, and push the outer tube together , Inner sleeve, make the guide bar protrude from the first port and the flexible hose at the front end of the inner sleeve reaches the foreign object, then take up the wire through the wire-releasing mechanism, and at the same time pull out the guide bar slightly, so that the fiber thread can be pulled easily The curved hose is bent inward, so that the front part of the flexible hose forms a funnel-shaped recess. Since the front end of the original flexible hose and the front end of the guide bar are in contact with foreign matter, during the process of forming the funnel-shaped recess, the funnel Negative pressure is formed at the funnel-shaped recess, and under the action of the negative pressure, the funnel-shaped recess absorbs the foreign matter, and then the outer sleeve, inner sleeve, and guide strip are pulled out at the same time, so that the foreign matter is gradually taken out. Since the foreign matter is sucked by forming negative pressure in the process of forming the funnel-shaped recess, there is no need to wrap the foreign matter from the outside, so it is possible to take out the larger foreign matter stuck by the blood vessel; It is not easy to fall off during the process, so it is safer and more reliable; when the foreign body is large, gas or liquid can be filled through the second port to inflate the balloon, thereby dilating the blood vessel, and try to avoid contact between the foreign body and the inner wall of the blood vessel, thereby greatly Reduce the friction between the foreign body and the inner wall of the blood vessel to a large extent, avoid the foreign body from scratching the blood vessel and make the removal of the foreign body more smooth, and at the same time dredge the blood vessel; Next, it can also be used as a single blood vessel expansion, only need to fill the gas or liquid through the second port to inflate the balloon, so that the patient's blood vessels can be unblocked.

As a preferred solution of the present invention, a crease line is provided between the flexible hose and the front end of the inner sleeve. By setting the crease line between the flexible hose and the front end of the inner cannula, the flexible hose is easier to bend along the crease line, so that it is easier to form a funnel-shaped suction head, and it is more convenient to take out foreign bodies in the blood vessel.

As a preferred solution of the present invention, the inner surface of the front part of the inner sleeve is further provided with a bent reinforcing sleeve. The front end of the inner sleeve is strengthened by setting a bending reinforcement sleeve on the inner surface of the front part of the inner sleeve, so that the front end of the inner sleeve is not easy to bend and maintains a certain degree of flexibility, and it is more convenient for the inner sleeve to be placed in the blood vessel. More importantly, the flexible hose is more likely to be bent inward at the bending reinforcement sleeve under the tension of the fiber thread, and it is easier to form a funnel-shaped suction tip, which is more convenient for the removal of foreign bodies in the blood vessel.

As a preferred solution of the present invention, the inner wall of the inner casing is further provided with a plurality of wire loops, and the fiber threads pass through corresponding wire loops. The fiber thread is limited by setting the wire loop to prevent the fiber thread from being messy and knotted.

As a further preferred solution of the present invention, the wire loop is arranged on the inner wall of the front end and the rear end of the inner sleeve.

As a preferred solution of the present invention, the number of the fiber wires is at least four, and the four fiber wires are connected to the rubber loops at equal intervals. The number of fiber threads is set to more than four, so that the force on the front end of the flexible hose is more uniform, so that the inward bending is also more uniform, forming a more uniform funnel, so that it is easier to absorb foreign objects in the blood vessel.

Compared with the prior art, the present invention has the following advantages:

This telescoping intravascular foreign body removal device pulls the flexible hose by fiber thread and bends it inward, so that the front part of the flexible hose forms a funnel-shaped recess. Contact with foreign matter, so in the process of forming the funnel-shaped recess, a negative pressure is formed at the funnel-shaped recess, and under the action of the negative pressure, the funnel-shaped recess absorbs the foreign matter, and then simultaneously pulls out the outer sleeve, inner sleeve, Guide strips, so that foreign objects are gradually removed. Since the foreign matter is sucked by forming negative pressure in the process of forming the funnel-shaped recess, there is no need to wrap the foreign matter from the outside, so it is possible to take out the larger foreign matter stuck by the blood vessel; It is not easy to fall off during the process, so it is safer and more reliable; when the foreign body is large, gas or liquid can be filled through the second port to inflate the balloon, thereby dilating the blood vessel, and try to avoid contact between the foreign body and the inner wall of the blood vessel, thereby greatly Reduce the friction between the foreign body and the inner wall of the blood vessel to a large extent, avoid the foreign body from scratching the blood vessel and make the removal of the foreign body more smooth, and at the same time dredge the blood vessel; Next, it can also be used as a single blood vessel expansion, only need to fill the gas or liquid through the second port to inflate the balloon, so that the patient's blood vessels can be unblocked.

Description of drawings

Fig. 1 is a schematic structural view of a preferred embodiment of the present invention;

Fig. 2 is a schematic diagram of passing through the inner casing and the outer casing along the guide bar along Fig. 1;

Fig. 3 is a schematic diagram of the funnel-shaped concave part formed by taking up the wire to absorb foreign matter.

Detailed ways

Further description will be given below in conjunction with the accompanying drawings and preferred embodiments of the present invention.

As shown in Figure 1, this telescopic intravascular foreign body removal device includes a guide bar 1, an outer sleeve 2, an inner sleeve 3, a balloon 4, a connecting piece 5, a wire release mechanism 6, and four fiber threads 7 (fibers). The number of silk threads 7 can be 2 to 5) and rubber coils 8, the inner casing 3 is in the outer casing 2, and the inner surface of the front part of the inner casing 3 is also provided with a bending reinforcement sleeve 9, and the inner casing 3 is connected to the outer casing 2. There is a gap between the outer tube 2, and the front end of the inner tube 3 protrudes outside the outer tube 2; the balloon 4 is fixedly connected between the front end of the outer tube 2 and the front end of the inner tube 3; the connecting piece 5 is fixedly installed on the outer tube 2, the connector 5 is provided with a first port 501 and a second port 502, the first port 501 communicates with the cavity of the inner casing 3, and the inner surface of the outer casing 2 and the outer surface of the inner casing 3, the inner A gas channel 10 is formed between the outer surface of the sleeve 3 and the inner surface of the balloon 4, and the second port 502 communicates with the gas channel 10; the inner wall of the front end and the inner wall of the rear end of the inner sleeve 3 are also provided with a plurality of wire loops 11, each The fiber threads 7 are drawn from the pay-off mechanism 6, and each fiber thread 7 penetrates from the rear end of the inner casing 3 and passes through the corresponding wire ring 11, and then each fiber thread 7 is drawn out from the front end of the inner casing 3 and connected with the rubber The connecting coils 8 are equidistantly connected; the front end of the inner casing 3 is also provided with a flexible hose 12, and a crease line 13 is provided between the flexible flexible hose 12 and the front end of the inner casing 3; The inner surface of the tube 12 is connected.

When there is a foreign body in the patient's blood vessel, as shown in Figure 2, first puncture the patient's blood vessel through the guide strip 1, so that the front end of the guide strip 1 reaches the position of the foreign body 14, and then connect the rubber connecting coil 8 with the flexible soft The inner surfaces of the tubes 12 are connected, and the outer sleeve 2 and the inner sleeve 3 are pushed together, so that the guide bar 1 protrudes from the first port 501 and the flexible hose 12 at the front end of the inner sleeve 3 reaches the foreign object 14, and then, as shown in the figure As shown in 3, the wire is taken up by the pay-off mechanism 6, and at the same time, the guide strip 1 is pulled out slightly, so that the fiber thread 7 pulls the flexible hose 12 and bends inward, so that the front part of the flexible hose 12 forms a funnel-shaped recess 15. Since the front end of the flexible hose 12 and the front end of the guide strip 1 are in contact with the foreign matter 14, during the process of forming the funnel-shaped recess 15, a negative pressure is formed at the funnel-shaped recess 15. Under the action of the negative pressure, The funnel-shaped recess 15 sucks the foreign matter 14, and then the outer sleeve 2, the inner sleeve 3, and the guide strip 1 are drawn out simultaneously, so that the foreign matter is gradually taken out.

In addition, it should be noted that, in the specific embodiments described in this specification, the names of various parts may be different, and all equivalent or simple changes made according to the structure, features and principles described in the patent concept of the present invention include Within the protection scope of the patent of the present invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, as long as they do not deviate from the structure of the present invention or exceed the scope defined in the claims. All should belong to the protection scope of the present invention.

Claims (5)

1. a kind of telescopiform vascular inner body withdrawing device, it is characterized in that：Including gib block, outer tube, inner sleeve, sacculus, company Fitting, at least payingoff mechanism, two fiber wires and rubber wiring circle, inner sleeve are in outer tube, inner sleeve and outer tube Between have a gap, and the front end of inner sleeve extends set tube outside；Sacculus is fixedly connected on outer tube front end and inner sleeve Between front end；Connector is fixedly mounted on the rear end of outer tube, and connector is provided with first port and second port, first port with The cavity of inner sleeve communicates, between outer sleeve inner surface and inner sleeve tube outer surface, between inner sleeve tube outer surface and sacculus inner surface Gas passage is formed, second port communicates with gas passage；Fiber wire is drawn from payingoff mechanism, and fiber wire is from after inner sleeve End penetrates is drawn from inner sleeve front end, and fiber wire is connected with rubber wiring circle；The front end of inner sleeve is additionally provided with pliable soft Pipe；Rubber wiring circle is connected with the inner surface of pliable flexible pipe.

2. telescopiform vascular inner body withdrawing device as claimed in claim 1, it is characterized in that：The pliable flexible pipe with it is described interior Crease line is provided between sleeve pipe front end.

3. telescopiform vascular inner body withdrawing device as claimed in claim 1, it is characterized in that：Table in the front portion of the inner sleeve Face is additionally provided with bending reinforcing sleeve.

4. telescopiform vascular inner body withdrawing device as claimed in claim 1, it is characterized in that：The inwall of the inner sleeve is also set There are multiple conductor loops, the filament passes through from corresponding conductor loop.

5. telescopiform vascular inner body withdrawing device as claimed in claim 1, it is characterized in that：The quantity of the fiber wire is At least four, each bar fiber wire is equidistantly connected with the rubber wiring circle.