CN110314272A - A kind of thrombus suction catheter with telescopic thrombi disruption elements - Google Patents

Abstract

The invention relates to a thrombus suction catheter with a telescopic thrombus crushing component, which includes a suction tube, a multi-channel socket and a crushing component. An annular drug injection channel is formed between the inner tube and the outer tube of the suction tube, and the multi-channel The pipe seat is composed of a main body, an injection branch pipe and a suction branch pipe. The crushing assembly includes a control channel pipe, a rotating shaft, a control rod and a crushing unit. The rotating shaft is installed in the control channel pipe. The crushing unit includes a first sleeve and a second sleeve And the breaking rod, the breaking rod is composed of two rods whose head ends are hinged together, the tail ends of the two rods are respectively hinged on the first sleeve and the second sleeve, the first sleeve is fixedly sleeved on the shaft, and the second The two sleeves are slidingly sleeved on the rotating shaft. When a thrombus with large volume and high viscosity is encountered, the crushing component can be unfolded, and the large thrombus can be crushed through the crushing component so that it can smoothly enter the suction tube. The crushing operation and suction operation can be performed at the same time, and the work efficiency is high. .

Description

A thrombus aspiration catheter with a telescopic thrombus fragment breaking component

technical field

The invention relates to the technical field of medical devices, in particular to a thrombus suction catheter with a telescoping thrombus block crushing component.

Background technique

Acute myocardial infarction (AMI) is a sharp reduction or interruption of coronary blood supply on the basis of coronary artery disease, causing severe and persistent acute ischemia of the corresponding myocardium, leading to myocardial necrosis. The incidence of AMI is dangerous, with a high mortality and disability rate. Since atherosclerosis is the pathological basis of acute cardiovascular and cerebrovascular events, the main cause of acute cardiovascular events is local atherosclerotic plaque rupture and thrombus formation, and thrombus formation depends on the susceptibility of atherosclerotic plaques. Destructive, vulnerable plaques are prone to plaque rupture and thrombosis, leading to the occurrence of acute coronary syndrome.

Thrombus aspiration is a new clinical method used in recent years. Its purpose is to quickly extract the thrombus blocking the diseased blood vessel through mechanical action. The incidence of "slow blood flow" and "no-reflow" has been further clinically verified. Through the thrombus aspiration catheter, combined with the use of drugs, the incidence of no-reflow can be significantly reduced, the blood flow of the target vessel can be improved, and the clinical Prognosis, it has good short-term and long-term effects in the treatment of patients with acute myocardial infarction, and after thrombus aspiration is applied, 2/3 of the cases can be directly implanted with stents without balloon pre-dilation, which saves medical expenses.

Thrombus aspiration is mainly divided into manual thrombus aspiration catheter and mechanical thrombus aspiration device. The principle of manual thrombus aspiration catheter is to use syringe suction to generate negative pressure to suck thrombus. The suction device is composed of basic components such as a suction catheter, a pressure extension tube, a suction syringe, and a suction filter. The suction catheter generally has a lockable joint or a tee. Mechanical thrombus aspiration devices can be divided into two categories according to their working principles: one is to remove thrombus through mechanical vacuum pump negative pressure suction (such as Rescue and TVAC), the principle is similar to manual thrombus aspiration catheter, except that Its negative pressure attraction is generated by a mechanical vacuum pump. The thrombus is aspirated by slowly advancing and withdrawing the catheter while maintaining negative pressure. Another type of mechanical thrombus suction device crushes the thrombus mechanically and excretes it from the body. According to the mechanism of thrombus crushing, it can be divided into two types: mechanical rotary cutting and fluid crushing.

For example, the patent application whose patent number is CN102319097A discloses a kind of thrombus suction catheter, which includes a tube base connecting the catheter, and the outer wall of the suction tube is movably sleeved with a sleeve, and the sleeve includes a Y-shaped connector , a double-lumen tube and a balloon, the Y-shaped connector is connected to the double-lumen tube, and the balloon is arranged on the outer wall of the distal end of the double-lumen tube; an interference wire can be inserted into the suction tube, and the distal end of the interference wire can be stretched out outside the distal end of the suction tube. The suction catheter can quickly remove the thrombus scattered in a wide area of blood vessels and deal with the embolism of the coronary capillaries; when encountering a large and highly viscous thrombus, the interference metal wire can be used to disperse the thrombus before suctioning, so that The present invention can deal with thrombus that is more difficult to aspirate. Although this technical solution solves the problem of sucking large and highly viscous thrombus, it still has certain deficiencies. First of all, the head end of the suction tube is an obliquely cut opening. Although it is convenient for the puncture of the suction tube, there is also a risk of operation errors and the head end punctures the blood vessel. Secondly, the operation of dispersing the thrombus and the suction operation cannot be carried out at the same time. The operation of dispersing the thrombus cannot be performed during suction, and the operation of dispersing the thrombus cannot be performed during suction. Frequent replacement of parts is required between the two operations. The operation is cumbersome and the suction efficiency is low.

Contents of the invention

The object of the present invention is to provide a thrombus aspiration catheter with a telescopic thrombus block breaking assembly to solve the shortcomings in the prior art.

In order to solve the above-mentioned technical problems, the present invention provides a technical solution: a thrombus suction catheter with a telescopic thrombus block crushing assembly, including a suction tube, a multi-channel socket and a crushing assembly. The tube and the outer tube are composed of an annular drug injection channel formed between the inner tube and the outer tube, and the tube body near the head end of the outer tube is provided with a drug outlet hole, and the tail ends of the inner tube and the outer tube are sealed. The multi-channel tube The seat is composed of a main body, an injection branch pipe and a suction branch pipe. The injection branch pipe and the suction branch pipe are symmetrically arranged on the side wall of the main body. The main body is sleeved at the tail of the suction pipe. Communication, the suction branch pipe communicates with the inside of the inner pipe, the crushing assembly includes a control channel pipe, a rotating shaft, a control rod and a crushing unit, the control channel pipe is installed inside the inner pipe along the axial direction of the inner pipe, and the control channel pipe The head end is connected with the inner tube through the supporting ribs, the tail end of the control channel tube protrudes from the inner tube, and the rotating shaft is passed through the control channel tube. The crushing unit includes a first sleeve, a second sleeve and a crushing rod. The rod is composed of two rod bodies whose head ends are hinged together. The tail ends of the two rod bodies are respectively hinged on the first sleeve and the second sleeve. The first sleeve is fixedly sleeved on the rotating shaft, and the second sleeve slides Located on the rotating shaft, the control rod is used to drive the second sleeve to move along the axial direction of the rotating shaft.

As a further optimization of the thrombus aspiration catheter with a telescopic thrombus block breaking assembly of the present invention: the rotating shaft is a hollow shaft body, two long through-holes are symmetrically arranged on the side wall of the rotating shaft, and the control rod is passed through the rotating shaft. Inside, the head end of the control rod is provided with a connecting rod, and the two ends of the connecting rod pass through the elongated through holes on both sides to connect with the inner wall of the second sleeve.

As a further optimization of the thrombus aspiration catheter with telescopic thrombus block breaking assembly of the present invention: the tail end of the rotating shaft is screwed with a control handle through threaded connection, the lower end of the control handle is provided with a ball groove, and the tail end of the control rod The end is provided with a ball head, and the 3/4 part of the ball head of the control rod is embedded in the ball groove.

As a further optimization of the thrombus aspiration catheter with the telescopic thrombus block breaking assembly of the present invention: the head end of the aspiration tube is a flat structure, and the breaking unit includes two breaking rods arranged symmetrically.

As a further optimization of the thrombus aspiration catheter with a telescopic thrombus block crushing assembly of the present invention: the head end of the suction tube is a beveled structure, and the crushing assembly also includes a top cover arranged at the head end of the rotating shaft.

As a further optimization of a thrombus aspiration catheter with a telescopic thrombus block breaking assembly of the present invention: the control channel tube is a reduced-diameter tube body, and the head end of the control channel tube is an enlarged-diameter tube body for accommodating the crushing unit.

As a further optimization of the thrombus aspiration catheter with the telescopic thrombus block breaking assembly of the present invention: a drug outlet hole is provided on the side wall of the outer tube near the head end.

As a further optimization of the thrombus aspiration catheter with the telescopic thrombus block breaking assembly of the present invention: the end of the outer tube is provided with a plurality of drug outlet holes distributed in a ring.

As a further optimization of the thrombus suction catheter with the telescopic thrombus block breaking assembly of the present invention: the injection branch pipe and the suction branch pipe are arranged at an angle of 60° with the main body.

Beneficial effect

1. The thrombus suction catheter of the present invention has a shrinkable thrombus crushing component. During normal suction, the crushing component shrinks in the suction tube, which will not affect the suction operation. When there is a large and highly viscous thrombus , the crushing assembly is unfolded, and the large thrombus can be crushed through the crushing assembly so as to smoothly enter the suction tube. The suction catheter of the present invention can perform crushing and suction operations at the same time, and has high working efficiency;

2. The thrombus suction catheter of the present invention is designed with a top cover, which can avoid damage to blood vessels during the insertion of the suction tube, and has a high safety factor.

Description of drawings

Fig. 1 is a schematic structural view of the thrombus aspiration catheter (broken component is in a contracted state) in Example 1;

Fig. 2 is a schematic structural view of the thrombus aspiration catheter in Example 1 (the crushing component is in an extended state);

Fig. 3 is a schematic structural view of the thrombus aspiration catheter (broken component is in a broken state) in Example 1;

Fig. 4 is the partially enlarged schematic diagram of place A in Fig. 3;

Fig. 5 is a partially enlarged schematic diagram of place B in Fig. 3;

Fig. 6 is a schematic structural view of the thrombus aspiration catheter in Example 2 (the broken component is in a contracted state);

Fig. 7 is a schematic structural view of the thrombus aspiration catheter in Example 2 (the broken component is in a broken state);

8 is a partially enlarged schematic diagram of the suction tube head of the thrombus suction catheter in Example 3;

9 is a schematic diagram of the connection relationship between the control rod and the second sleeve of the thrombus aspiration catheter in Embodiment 1;

Marks in the figure: 1. Suction tube, 2. Multi-channel tube holder, 3. Crushing component, 1-1, inner tube, 1-2, outer tube, 1-3, drug outlet hole, 2-1, main body , 2-2, injection branch pipe, 2-3, suction branch pipe, 3-1, control channel pipe, 3-2, rotating shaft, 3-3, top cover, 3-4, control rod, 3-5, the first A sleeve, 3-6, a second sleeve, 3-7, a broken rod, 3-8, a strip-shaped through hole, 3-9, a connecting rod, 3-10, a control handle.

Detailed ways

The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

Example 1

As shown in the figure: a thrombus aspiration catheter with a telescopic thrombus block crushing component, including a suction tube 1, a multi-channel tube base 2 and a crushing component 3, the head end of the suction tube 1 can be placed in the patient's artery , the multi-channel socket 2 is connected to the tail of the suction tube 1, and is used for injecting medicine into the suction tube 1, aspirating thrombus, and crushing. broken. The suction pipe 1 is composed of an inner pipe 1-1 and an outer pipe 1-2. The head end and the tail end of the inner pipe 1-1 and the outer pipe 1-2 are closed by a ring plate, and the inner pipe 1-1 and the outer pipe An annular drug injection channel is formed between 1-2, and the side wall of the outer tube 1-2 close to the head end is provided with a drug outlet hole 1-3, and the thrombolytic drug in the annular drug injection channel enters the patient's artery through the drug outlet hole 1-3 Inside. The multi-channel socket 2 is composed of a main body 2-1, an injection branch pipe 2-2 and a suction branch pipe 2-3, and the injection branch pipe 2-2 and the suction branch pipe 2-3 are arranged symmetrically on the side of the main body 2-1 wall, the injection branch pipe 2-2 and the suction branch pipe 2-3 are set at an angle of 60° with the main body 2-1, the main body 2-1 is sleeved at the tail of the suction pipe 1, and the tail of the suction pipe 1 end protrudes from the main body 2-1, and the head end of the injection branch pipe 2-2 communicates with the annular injection channel, and the suction branch pipe 2-3 communicates with the interior of the inner tube 1-1, and the injection branch pipe 2-2 can be used to Thrombolytic drugs are input into the annular drug injection channel, and the thrombus extracted from the inner tube 1-1 can be discharged out of the suction tube 1 through the suction branch tube 2-3. The crushing assembly 3 includes a control channel pipe 3-1, a rotating shaft 3-2, a control rod 3-4 and a crushing unit, and the control channel pipe 3-1 is installed inside the inner pipe 1-1 along the axial direction of the inner pipe 1-1 , the control channel pipe 3-1 is a reduced-diameter pipe body, and the head end of the control channel pipe 3-1 is an enlarged-diameter pipe body for accommodating the crushing unit. The head end of the control channel tube 3-1 is connected to the inner tube 1-1 through the supporting ribs, the tail end of the control channel tube 3-1 extends out from the tail of the suction tube 1, and the place where the control channel tube 3-1 passes through is for To prevent leakage of suction liquid, some conventional sealing structures need to be provided. The rotating shaft 3-2 is installed in the control channel pipe 3-1, and a conventional sealing structure is also arranged between the rotating shaft 3-2 and the control channel pipe 3-1, so as to prevent the suction liquid from passing between the rotating shaft 3-2 and the control channel pipe. The gap between 3-1 leaks, the head end of the suction pipe 1 is a flat head structure, the crushing unit includes two crushing rods 3-7 arranged symmetrically, the top cover 3-3 is a trumpet-shaped structure, and the top cover 3-3 The large-diameter end is fixedly connected to the head end of the rotating shaft 3-2, and the trumpet-shaped structure of the top cover 3-3 facilitates the advancement of the suction tube 1 in the artery. The crushing unit includes a first sleeve 3-5, a second sleeve 3-6, and a crushing rod 3-7. The crushing rod 3-7 is composed of two rod bodies whose head ends are hinged together, and the tail ends of the two rod bodies are respectively hinged. On the first sleeve 3-5 and the second sleeve 3-6, the first sleeve 3-5 is fixedly sleeved on the rotating shaft 3-2, and the second sleeve 3-6 is slidingly sleeved on the rotating shaft 3-2 On, the control rod 3-4 is used to drive the second sleeve 3-6 to move along the axial direction of the rotating shaft 3-2, and the tail end of the rotating shaft 3-2 protrudes from the control passage tube 3-1 to set, which can rotate the rotating shaft 3-2 A push-pull operation is performed to move the crushing unit along the axial direction of the control channel pipe 3-1.

The second sleeve 3-6 is controlled to slide through the following structure: the rotating shaft 3-2 is a hollow shaft body, and the side wall of the rotating shaft 3-2 is symmetrically provided with two elongated through holes 3-8, and the control rod 3-4 Set in the rotating shaft 3-2, the head end of the control rod 3-4 is provided with a connecting rod 3-9, and the two ends of the connecting rod 3-9 pass through the elongated through holes 3-8 on both sides and the second set of Barrel 3-6 inner wall is connected. The tail end of the rotating shaft 3-2 is screwed with a control handle 3-10 through threaded connection, the lower end of the control handle 3-10 is provided with a ball groove, the tail end of the control rod 3-4 is provided with a ball head, and the control rod 3-4 The 3/4 part of the ball head is embedded in the ball groove.

The structural principle and usage method of the thrombus suction catheter in this embodiment are as follows: puncture the femoral artery or radial artery, insert the head end of the suction tube into the patient's artery, and reach the occlusion of the blood vessel, start the suction device, use The external negative pressure device continuously sucks the thrombus into the suction tube and discharges it. When a thrombus with large volume and high viscosity is encountered, push the rotating shaft to move forward, so that the crushing unit extends out of the control channel tube, and then rotates Move the control handle, push the control rod to move forward, and the control rod drives the second sleeve to move forward. As the distance between the first sleeve and the second sleeve shrinks, the broken rod is expanded. At this time, manually move back and forth Turn the rotating shaft to drive the broken rod to rotate, and then break up the large thrombus. The broken thrombus is directly sucked into the suction tube and discharged. Move, the control rod drives the second sleeve to move backward, as the distance between the first sleeve and the second sleeve becomes larger, the crushing rod is retracted, and then the rotating shaft is pulled out backward to make the crushing unit retract Just inside the control channel tube. When it is necessary to inject medicine, connect the medicine syringe to the medicine injection branch pipe, push the syringe, make the medicine enter the circular medicine injection channel and enter the patient's blood vessel through the medicine outlet hole, and perform the medicine thrombolysis operation.

Example 2

As shown in the figure: a thrombus aspiration catheter with a telescopic thrombus block breaking assembly, its basic structure is the same as that of Example 1, the difference is that the head end of the suction tube 1 is a beveled structure, and the breaking assembly 3 also includes a top cover 3-3 arranged at the head end of the rotating shaft 3-2. The suction tube 1 of the beveled structure has a larger suction port for thrombus, but when the spikes formed by the beveled structure travel in the blood vessel, the spikes The end of the rotating shaft is easy to scratch the blood vessel wall. In order to solve this problem, a top cover is set on the top of the rotating shaft, which can play a protective role in the process of advancing.

Example 3

As shown in the figure: a thrombus aspiration catheter with a telescopic thrombus block breaking assembly, its basic structure is the same as that of embodiment 1, the difference is that the end of the outer tube 1-2 is provided with a plurality of circularly distributed The drug outlet hole 1-3 is different from embodiment 1. The drug outlet hole 1-3 of the present embodiment is arranged on the end face of the nozzle, and is arranged towards the direction of suction, which is beneficial to the direct access of the drug to the clogged place of the thrombus. In order to prevent the injected drug from It is sucked directly into the suction tube, and the suction operation is stopped during the drug injection.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, may use the technical content disclosed above to make some changes or modify them into equivalent embodiments with equivalent changes, but as long as they do not depart from the technical solution of the present invention, the Technical Essence Any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solution of the present invention.

Claims (9)

1. a kind of thrombus suction catheter with telescopic thrombi disruption elements, it is characterised in that: including suction tube (1), more Channel tube socket (2) and disruption elements (3), the suction tube (1) are made of inner tube (1-1) and outer tube (1-2), inner tube (1-1) Annular injection channel is formed between outer tube (1-2), outer tube (1-2) is provided with medicine outlet hole (1-3) on the tube body of near head end, interior The tail end of pipe (1-1) and outer tube (1-2) is all closed setting, and the multichannel tube socket (2) is by main pipe (2-1), injection branch pipe (2- 2) it is constituted with suction branch (2-3), injection branch pipe (2-2) and suction branch (2-3) are symmetricly set on the side of main pipe (2-1) Wall, main pipe (2-1) are set in suction tube (1) tail portion, and injection branch pipe (2-2) head end is connected to annular injection channel, suction branch Pipe (2-3) is connected to the inside of inner tube (1-1), and the disruption elements (3) include control channel pipe (3-1), shaft (3-2), control Bar (3-4) processed and fragmentation cell, control channel pipe (3-1) are threaded through the interior of inner tube (1-1) along the axis direction of inner tube (1-1) The head end in portion, control channel pipe (3-1) is connect by support rod with inner tube (1-1), and the tail end of control channel pipe (3-1) stretches out Inner tube (1-1) setting, the shaft (3-2) are threaded through in control channel pipe (3-1), fragmentation cell include first sleeve (3-5), Second sleeve (3-6) and crushing rod (3-7), the hinged body of rod of crushing rod (3-7) You Lianggen head end are constituted, two bars The tail end of body is respectively hinged in first sleeve (3-5) and second sleeve (3-6), and first sleeve (3-5) fixation is set in shaft On (3-2), second sleeve (3-6) is slidably located on shaft (3-2), and control-rod (3-4) is for driving the edge second sleeve (3-6) The axial movement of shaft (3-2).

2. a kind of thrombus suction catheter with telescopic thrombi disruption elements as described in claim 1, it is characterised in that: The shaft (3-2) is hollow shaft, and there are two long stripes through hole (3-8), control-rods for the sidewall symmetry setting of shaft (3-2) (3-4) is threaded through in shaft (3-2), and the head end of control-rod (3-4) is provided with connecting rod (3-9), the both ends point of connecting rod (3-9) Not Chuan Guo two sides long stripes through hole (3-8) connect with second sleeve (3-6) inner wall.

3. a kind of thrombus suction catheter with telescopic thrombi disruption elements as claimed in claim 2, it is characterised in that: The tail end of the shaft (3-2), which is connected through a screw thread, to be installed with control handle (3-10), and the lower end of control handle (3-10) is provided with Ball groove, the tail end of control-rod (3-4) are provided with bulb, and the bulb 3/4 of control-rod (3-4) is partially submerged into setting in ball groove.

4. a kind of thrombus suction catheter with telescopic thrombi disruption elements as described in claim 1, it is characterised in that: The head end of the suction tube (1) is flush configuration, and fragmentation cell includes symmetrically arranged two crushing rods (3-7).

5. a kind of thrombus suction catheter with telescopic thrombi disruption elements as described in claim 1, it is characterised in that: The head end of the suction tube (1) is chamfered structure, and disruption elements (3) further include top cover (3- of the setting in shaft (3-2) head end 3).

6. a kind of Biochemical analyzer with telescopic thrombi disruption elements as claimed in any one of claims 1-5 Conduit, it is characterised in that: the control channel pipe (3-1) is variable diameter tube body, and the head end of control channel pipe (3-1) is expansion tube Body, for accommodating fragmentation cell.

7. a kind of Biochemical analyzer with telescopic thrombi disruption elements as claimed in any one of claims 1-5 Conduit, it is characterised in that: the outer tube (1-2) is provided with medicine outlet hole (1-3) on the side wall of near head end.

8. a kind of Biochemical analyzer with telescopic thrombi disruption elements as claimed in any one of claims 1-5 Conduit, it is characterised in that: the end of the outer tube (1-2) is provided with the multiple medicine outlet holes (1-3) being distributed in a ring.

9. a kind of Biochemical analyzer with telescopic thrombi disruption elements as claimed in any one of claims 1-5 Conduit, it is characterised in that: set between the injection branch pipe (2-2) and suction branch (2-3) and main pipe (2-1) in 60 ° of angles It sets.