CN113520526B

CN113520526B - Thrombolysis protection device for femoral artery blood vessel puncture

Info

Publication number: CN113520526B
Application number: CN202110781185.4A
Authority: CN
Inventors: 周军; 李闯; 唐顺雄; 赵广生; 王浩
Original assignee: Affiliated Zhongshan Hospital of Dalian University
Current assignee: Affiliated Zhongshan Hospital of Dalian University
Priority date: 2021-07-10
Filing date: 2021-07-10
Publication date: 2022-09-06
Anticipated expiration: 2041-07-10
Also published as: CN113520526A

Abstract

The invention relates to the technical field of vascular interventional therapy, in particular to a thrombolysis protective device for femoral artery vascular puncture, wherein a main body of an introduction body is arranged in a catheter, the introduction body can rotate or slide in the catheter, the front end of the introduction body is arranged outside the front end of the catheter, the first end of an interception strip body is connected to the outer annular surface of the introduction body close to the front end, the second end of the interception strip body is connected to the outer annular surface of the catheter close to the front end, a plurality of interception strip bodies are arranged, and the interception strip bodies are distributed at equal intervals; the front end of the leading-in body and the front end of the guide pipe move towards each other and approach each other, the leading-in body and the guide pipe rotate relatively, and the plurality of intercepting strip bodies are twisted to form a string bag structure. The device is attached to an intravascular interventional device to form a barrier against thrombus.

Description

Thrombolysis protection device for femoral artery blood vessel puncture

Technical Field

The invention relates to the technical field of vascular interventional therapy, in particular to a femoral artery vascular puncture thrombolysis protection device.

Background

Thrombi are small pieces of blood flow that form on the surface of an endovascular denuded or repaired site. In the variable fluid-dependent type, the thrombus is composed of insoluble fibrin, deposited platelets, accumulated white blood cells and entrapped red blood cells.

One of the thrombolysis methods in the prior art is to use a physical method to dissolve thrombus, for example, a method such as high-pressure physiological saline, laser, etc. to strip thrombus from a blood vessel, but the method using such physical thrombolysis has disadvantages, one of which is that after the thrombus is stripped from the blood vessel, if the thrombus is large, the thrombus is easy to cause thrombus in limbs or organs, and how to block the thrombus at the time of physical thrombolysis is one of the subjects.

Disclosure of Invention

In order to solve the problems, the invention provides a femoral artery blood vessel puncture thrombolysis protective device which is attached to an intravascular interventional device and can form protection for blocking thrombus.

In order to achieve the purpose, the invention adopts the technical scheme that:

a femoral artery blood vessel puncture thrombolytic protection device comprises a guide-in body, a catheter and a plurality of intercepting strips, wherein the main body of the guide-in body is arranged in the catheter, the guide-in body can rotate or slide in the catheter, the front end of the guide-in body is arranged outside the front end of the catheter, the first end of each intercepting strip is connected to the outer annular surface of the guide-in body and close to the front end, the second end of each intercepting strip is connected to the outer annular surface of the catheter and close to the front end, and the intercepting strips are distributed at equal intervals;

the front end of the leading-in body and the front end of the guide pipe move towards each other and are close to each other, the leading-in body and the guide pipe rotate relatively, and the plurality of intercepting strip bodies are twisted to form a string bag structure.

Preferably, the diameter of the body of the interception bar is between 400 and 550 microns.

Preferably, the guide tube is provided with a hollow guide groove, the outer wall of the introduction body is penetrated with a protruding sliding body, the sliding body is embedded into the guide groove, and when the sliding body slides along the guide groove from a first position to a third position, the interception strip bodies are curved from two dimensions to three dimensions, so that a plurality of interception strip bodies are twisted to form a string bag structure.

Preferably, the guide groove comprises a first guide groove section and a second guide groove section, wherein the first guide groove section is in a circular arc shape extending from the front end of the guide pipe to the rear end of the guide pipe, the rear end of the first guide groove section extends axially towards the front end of the guide pipe to form the second guide groove section, and the sliding body can be embedded into the free tail end of the second guide groove section.

Preferably, the sliding body is in a circular truncated cone structure, and the diameter of the sliding body is matched with the opening width of the guide groove.

Preferably, when the intercepting bar bodies are twisted to form the net bag structure, the diameter of a circle where the outer ring of the net bag structure is located is 9 mm-9.5 mm.

Preferably, the intercepting body has a first end diameter greater than a second end diameter, and the intercepting body has a first end to second end diameter that gradually decreases.

Preferably, the diameter of the first end of the intercepting bar is larger than that of the second end, and the diameter of the intercepting bar is gradually reduced from the first end to the middle position of the intercepting bar.

The beneficial effects of the invention are as follows:

the thrombolytic protection device enables the interception strip body to bend in the three-dimensional direction to form a braided reticular string bag structure through relative axial movement and rotation of the operation introduction body and the catheter, and the outer side edge of the string bag structure abuts against the inner wall of the blood vessel to form protection for intercepting thrombus. The device can be repeatedly used after being taken out through ultrasonic vibration and disinfection, has no material consumption, is particularly suitable for blood vessels with larger diameter, such as femoral artery or popliteal artery, and the like, and has great economic value.

Drawings

Fig. 1 is a schematic diagram of a first state of the femoral artery blood vessel puncture thrombolytic protection device of the invention.

Fig. 2 is a schematic diagram of a second state of the femoral artery blood vessel puncture thrombolysis protective device.

Fig. 3 is a schematic diagram of a third state of the femoral artery blood vessel puncture thrombolytic protection device of the invention.

Fig. 4 is a schematic view of a guide groove of the femoral artery blood vessel puncture thrombolytic protection device of the invention.

Fig. 5 is a schematic unfolding view of a guide groove of the femoral artery blood vessel puncture thrombolysis protective device.

Fig. 6 is a schematic view of a first state of the interception strip body of the femoral artery blood vessel puncture thrombolytic protection device of the present invention.

Fig. 7 is a schematic view of a second state of the interception strip body of the femoral artery blood vessel puncture thrombolytic protection device of the present invention.

Fig. 8 is a schematic structural view of an intercepting strip body of the femoral artery blood vessel puncture thrombolytic protection device of the invention.

The reference numerals include:

10-blood vessel, 11-thrombus, 20-leading-in body, 21-leading-in body front end, 22-sliding body, 22A-first position, 22B-second position, 22C-third position, 30-guide tube, 31-guide groove, 311-guide groove first section, 312-guide groove second section, 40-interception strip body and P-tuck pocket inner concave area.

Detailed Description

In order to make the purpose, technical solution and advantages of the present technical solution more clear, the present technical solution is further described in detail below with reference to specific embodiments. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present teachings.

As shown in fig. 1-8, the embodiment provides a thrombolytic protection device for femoral artery vascular puncture, comprising an introducer 20, a catheter 30 and intercepting strips 40, wherein the introducer 20 is disposed inside the catheter 30, the introducer 20 can rotate or slide inside the catheter 30, the front end of the introducer 20 is disposed outside the front end of the catheter 30, the first end of the intercepting strips 40 is connected to the outer circumferential surface of the introducer 20 near the front position, the second end of the intercepting strips 40 is connected to the outer circumferential surface of the catheter 30 near the front position, the intercepting strips 40 are provided in plurality, and the intercepting strips 40 are distributed at equal intervals; the front end of the lead-in body 20 and the front end of the conduit 30 move towards each other and close, and the lead-in body 20 and the conduit 30 rotate relatively, and the plurality of intercepting strip bodies 40 are twisted to form a string bag structure.

Specifically, as shown in fig. 1, in the first state, the catheter 30 is sleeved outside the introducer 20, the blood flow direction is as shown in fig. 1, and when the introducer 20 and the catheter 30 enter the blood vessel 10, the introducer 20 is extended forward to the limit state, so that the interception strips 40 are kept as close to the outer wall of the introducer 20 as possible, that is, the outer diameter of the assembly formed by a plurality of the interception strips 40 is small and can pass through the thrombus 11. Meanwhile, in the first state, the axial projection of the interception bar 40 along the blood vessel 10 is shown in fig. 6.

As shown in fig. 2, in the second state, after the intercepting bar 40 passes through the thrombus 11, the introducing body 20 is pulled backward or the guide sleeve is pushed forward, and after the front end of the introducing body 21 and the front end of the catheter 30 are relatively close, the intercepting bar 40 is bent and the middle part is opened outward. As shown in fig. 3, the intercepting strip 40 is bent to finally form a shape having a large curvature at the middle section. In this process, the interception bar body 40 forms only a 2-dimensional bend.

In the above process, the intercepting bar 40 is twisted by relatively rotating the introduction body 20 and the guide duct 30 during the process from the first state to the third state, and the intercepting bar 40 is formed into only a 3-dimensional curve. The interception bar body 40 is largely folded, so that the main bending of the interception bar body 40 is completed by the middle part of the interception bar body 40, at this time, the interception bar body 40 forms a third state, the axial projection of the interception bar body 40 along the blood vessel 10 is shown in fig. 7, that is, a plurality of interception bar bodies 40 are bent in the three-dimensional direction to form a net-shaped net bag structure. The outer wall of the interception bar 40 abuts against the inner wall of the blood vessel 10. In the process of physical thrombolysis of the thrombus 11, if the thrombus 11 falls off, the thrombus 11 can fall into the concave area P of the net bag.

The body diameter of the interception bar 40 is 400-550 microns.

As shown in fig. 4 and 5, the guide duct 30 is provided with a hollow guide groove 31, the outer wall of the introduction body 20 is penetrated by a protruding sliding body 22, the sliding body 22 is inserted into the guide groove 31, and when the sliding body 22 slides along the guide groove 31 from the first position 22A to the third position 22C, the interception bar bodies 40 are curved from two dimensions to three dimensions, so that the plurality of interception bar bodies 40 are twisted to form a string bag structure.

Specifically, guide slot 31 includes a first guide slot segment 311 and a second guide slot segment 312, wherein guide slot segment 311 is arc-shaped and extends from the front end of guide tube 30 to the rear end of guide tube 30, the rear end of guide slot segment 311 extends axially towards the front end of guide tube 30 to form second guide slot segment 312, and sliding body 22 can be inserted into the free end of second guide slot segment 312.

By the cooperation of the sliding body 22 and the guiding groove 31, the sliding body 22 can move along the guiding groove 31, as shown in fig. 5, during the process of moving the sliding body 22 from the first position 22A to the third position 22C, the guiding body 20 completes the relative axial movement in the guiding tube 30, and the completed relative circumferential rotation, so as to realize the 3-dimensional torsional bending deformation of the intercepting strip body 40.

Referring to the second position 22B in fig. 5, the second position 22B is outside the guiding groove 31, and the second position 22B is a virtual position, and if the sliding body 22 moves to the second position 22B, the intercepting bar 40 is twisted to the limit, at this time, due to the diameter of the intercepting bar 40 itself and the interval between the adjacent intercepting bar 40, the intercepting bar 40 will be in a completely sealed state, that is, the outer walls of the main bodies of the two adjacent intercepting bar 40 abut against each other, so that when the guiding body 20 and the guiding sleeve rotate circumferentially relative to each other, the circumferential limit position of the sliding body 22 should not move to be axially flush with the second position 22B. I.e. with the slider 22 in the third position 22C, the interception bars 40 are slightly expanded and form a braided mesh in axial projection inside the blood vessel 10.

The sliding body 22 is of a circular truncated cone structure, and the diameter of the sliding body 22 is matched with the opening width of the guide groove 31.

When the intercepting strip body 40 is twisted to form the net bag structure, the diameter of the circle where the outer ring of the net bag structure is located is 9 mm-9.5 mm, so that the intercepting strip body is abutted against the inner wall of the femoral artery 10.

As shown in fig. 8, the interception bar body 40 has a diameter of a first end larger than a diameter of a second end, and the interception bar body 40 has a diameter gradually decreasing from the first end to the second end. In another embodiment, the diameter of the first end of the damming strip 40 is greater than the diameter of the second end, and the damming strip 40 has a diameter that decreases from the first end to a position intermediate the damming strip 40. The variation of the diameter of the intercepting bar 40 is beneficial to controlling the main deformation region of the intercepting bar 40 to be positioned in the middle section.

The introducer 20 of the present thrombolytic protection device may be an endoscopic fiber for use in conjunction with endoscopic techniques. The leading end 21 of the introduction body is formed in a circular arc shape to facilitate introduction of the introduction body 20.

The foregoing is only a preferred embodiment of the present invention, and many variations in the specific embodiments and applications of the invention may be made by those skilled in the art without departing from the spirit of the invention, which falls within the scope of the claims of this patent.

Claims

1. The utility model provides a arteria femoralis blood vessel puncture thrombolysis protector which characterized in that: the device comprises a guide body, a catheter and a plurality of intercepting strips, wherein the main body of the guide body is arranged in the catheter, the guide body can rotate or slide in the catheter, the front end of the guide body is arranged outside the front end of the catheter, the first end of each intercepting strip is connected to the outer annular surface of the guide body and close to the front end, the second end of each intercepting strip is connected to the outer annular surface of the catheter and close to the front end, and the intercepting strips are distributed at equal intervals;

the front end of the leading-in body and the front end of the guide pipe move towards each other and approach each other, the leading-in body and the guide pipe rotate relatively, and the plurality of intercepting strip bodies are twisted to form a string bag structure;

the guide tube is provided with a hollow guide groove, the outer wall of the leading-in body is provided with a convex sliding body, the sliding body is embedded into the guide groove, and when the sliding body slides along the guide groove from a first position to a third position, the intercepting strip bodies are bent from a two-dimensional shape to a three-dimensional shape, so that a plurality of intercepting strip bodies are twisted to form a string bag structure;

the guide groove comprises a first guide groove section and a second guide groove section, wherein the first guide groove section is in a circular arc shape extending from the front end of the guide pipe to the rear end of the guide pipe, the rear end of the first guide groove section axially extends to the front end of the guide pipe to form the second guide groove section, and the sliding body can be embedded into the free tail end of the second guide groove section.

2. The femoral artery vessel puncture thrombolytic protection device of claim 1, wherein: the diameter of the main body of the interception strip body is 400-550 microns.

3. The femoral artery vessel puncture thrombolytic protection device of claim 1, wherein: the sliding body is of a circular truncated cone structure, and the diameter of the sliding body is matched with the opening width of the guide groove.

4. The femoral artery vessel puncture thrombolytic protection device of claim 1, wherein: when the intercepting strip bodies are twisted to form the net bag structure, the diameter of a circle where the outer ring of the net bag structure is located is 9-9.5 mm.

5. The femoral artery vessel puncture thrombolytic protection device of claim 1, wherein: the diameter of the first end of the intercepting strip body is larger than that of the second end, and the diameter of the first end of the intercepting strip body is gradually reduced to the diameter of the second end of the intercepting strip body.

6. The femoral artery vessel puncture thrombolytic protection device of claim 1, wherein: the diameter of the first end of the intercepting strip body is larger than that of the second end of the intercepting strip body, and the diameter of the first end of the intercepting strip body to the middle of the intercepting strip body is gradually reduced.