CN214633347U

CN214633347U - Thrombus aspiration catheter

Info

Publication number: CN214633347U
Application number: CN202023109256.6U
Authority: CN
Inventors: 李记华; 李勇; 许卫国; 郑游冰; 白骁; 黄建文
Original assignee: Zhuhai Peoples Hospital
Current assignee: Zhuhai Peoples Hospital
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-11-09
Anticipated expiration: 2030-12-22

Abstract

A thrombus suction catheter comprises a spiral wire ring, a catheter main body and an elastic tube communicated with one end of the catheter main body, wherein one end of the elastic tube, which is far away from the catheter main body, is curled towards one side to form an elbow; the spiral wire ring is embedded in the inner side wall of the elastic tube; the catheter main body is convenient for a user to hold, the elastic tube has certain deformation capacity, and the elbow on the elastic tube is designed, so that the thrombus suction catheter has good compliance and trafficability, the inner wall of a blood vessel and venous valves can be prevented from being scratched in the suction process, and the suction force on the mural thrombus is improved; in addition, the spiral wire ring is arranged in the elastic tube to support the elastic tube, so that the elastic tube is prevented from collapsing and deforming in the thrombus suction process.

Description

Thrombus aspiration catheter

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a thrombus suction catheter.

Background

Thrombi are small patches of blood flow that form on the surface of a denuded or repaired site within a blood vessel of the cardiovascular system. In the variable fluid-dependent type, the thrombus is composed of insoluble fibrin, deposited platelets, accumulated white blood cells and entrapped red blood cells, and obstructions such as deposits, plaques and the like exist to form thrombus to block or interrupt blood flow, thereby causing local tissue necrosis to affect human health and even being life-threatening.

In order to solve the problem that thrombus blocks a blood vessel, a thrombus suction catheter is generally used in the prior art, the catheter is conveyed to a thrombus part along the blood vessel, negative pressure is directly applied to the catheter, thrombus is extracted, and the blood vessel reestablishes blood flow dynamics.

However, the thrombus aspiration catheter in the prior art is usually a hard straight tube, which has good support property but poor compliance, and may scratch the inner wall of the blood vessel and the venous valve in the aspiration process;

however, if a soft bent tube is used, the compliance can be improved, but the soft bent tube is likely to collapse and deform during the thrombus aspiration process, thereby affecting the thrombus aspiration efficiency.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

In order to solve the problems, the utility model provides a thrombus suction catheter, which solves the problems mentioned in the background technology.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme:

a thrombus suction catheter comprises a spiral wire ring, a catheter main body and an elastic tube communicated with one end of the catheter main body, wherein one end of the elastic tube, which is far away from the catheter main body, is curled to one side to form an elbow; the spiral wire ring is embedded in the inner side wall of the elastic tube.

Preferably, the catheter main body and the elastic tube are seamlessly connected, and the outer diameters of the catheter main body and the elastic tube become gradually smaller in a direction away from the catheter main body.

Preferably, the catheter body has a tube inner diameter greater than or equal to a tube inner diameter of the elastic tube.

Preferably, the outer diameter of the catheter body at the end away from the elastic tube is 2.7mm, and the outer diameter of the elbow on the elastic tube is 2.5 mm; the pipe internal diameter of pipe main part is 2.66mm, the pipe internal diameter of elasticity pipe is 2.4 mm.

Preferably, the bend has a bending angle α, wherein the α angle is 135 ° to 150 °.

Preferably, the catheter body is made of a polyester material.

Preferably, the elastic tube is made of a polyurethane material, and the outer surface of the elastic tube is provided with a hydrophilic coating.

Preferably, the spiral wire ring is made of nickel-titanium alloy material, and the spiral wire ring adopts a double-spiral structure.

Preferably, the catheter body is 112cm in length, the flexible tube is 20cm in length, and the elbow is 4cm in length.

Preferably, the end of the catheter main body far away from the elastic tube is provided with an airflow valve head, and a joint of the airflow valve head is communicated with an external negative pressure suction device.

(III) advantageous effects

The utility model provides a thrombus suction catheter, its simple structure, convenient operation, wherein the catheter main body is convenient for the user to hold, and the elastic tube itself has certain deformability, and the elbow design on the elastic tube, so that the thrombus suction catheter has good compliance and trafficability characteristic, can avoid scratching the inner wall of the blood vessel and the venous valve in the suction process, and simultaneously improves the suction force to the thrombus adhering to the wall; in addition, through set up the spiral wire circle in the elastic tube inside and be used for supporting the elastic tube, avoid the thrombus suction in-process elastic tube to collapse and warp, improve the clearance efficiency of thrombus.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description, do not constitute a limitation of the invention, in which:

fig. 1 shows a schematic view of the overall structure of the present invention;

FIG. 2 shows a front view of FIG. 1;

FIG. 3 shows a right side view of FIG. 1;

FIG. 4 shows a cross-sectional view A-A of FIG. 3;

FIG. 5 shows an enlarged view at A in FIG. 4;

fig. 6 shows a schematic structural view of the spiral wire coil of the present invention.

In the figure: 1 catheter body, 10 airflow valve head, 2 elastic tube, 20 elbow and 3 spiral wire coil.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to the attached drawings 1-5, the thrombus suction catheter comprises a spiral wire coil 3, a catheter main body 1 and an elastic tube 2 communicated with one end of the catheter main body 1, wherein one end of the elastic tube 2, which is far away from the catheter main body 1, is curled towards one side to form an elbow 20; the spiral wire ring 3 is embedded on the inner side wall of the elastic tube 2.

The thrombus aspiration catheter in the utility model has the following steps:

firstly, puncture blood vessel earlier and establish the route, then carry the seal wire to appointed position in the blood vessel, carry along the seal wire the utility model discloses a thrombus suction catheter for elastic tube 2 is close to the thrombus, and elbow 20 and the thrombus piece contact on the elastic tube 2 withdraw the seal wire.

Then, an external negative pressure device, such as a syringe, is communicated with the catheter main body 1, the thrombus block of the blood vessel is repeatedly sucked under the negative pressure, namely, the thrombus block passes through the elbow 20, the elastic tube 2 body and the catheter main body 1 in sequence and is finally sucked out of the body; and after the suction is finished, disconnecting the external negative pressure equipment, and withdrawing the thrombus suction catheter.

To sum up, the utility model has simple structure and convenient operation, wherein the catheter main body 1 is convenient for the user to hold, the elastic tube 2 has certain deformation capacity, and the elbow 20 on the elastic tube 2 is designed, so that the thrombus suction catheter has good compliance and trafficability, can avoid scratching the inner wall of the blood vessel and the venous valve in the suction process, and simultaneously improves the suction force to the thrombus adhering to the wall; in addition, through set up spiral wire circle 3 and be used for supporting elastic tube 2 in elastic tube 2 is inside, avoid the thrombus suction in-process elastic tube 2 to collapse the deformation, improve the clearance efficiency of thrombus.

Referring to the attached drawings 1-2, the catheter main body 1 is connected with the elastic tube 2 in a seamless mode, so that the thrombus suction catheter is good in tightness, and the phenomenon that suction cannot be performed due to air leakage in the thrombus suction process is avoided; in addition, the outer diameters of the catheter main body 1 and the elastic tube 2 are gradually reduced along the direction far away from the catheter main body 1, so that the thrombus aspiration catheter can be conveniently inserted into a limb far-section blood vessel gradually, the application range of the thrombus aspiration catheter is obviously improved, the resistance of the elastic tube 2 and the catheter main body 1 during conveying in the blood vessel can be reduced, and the conveying efficiency and the conveying effect of the thrombus aspiration catheter are improved.

Referring to fig. 4-5, the outer diameter of the catheter body at the end away from the elastic tube is 2.7mm, and the outer diameter of the elbow on the elastic tube is 2.5 mm; the inner diameter of the tube of the catheter main body is 2.66mm, and the inner diameter of the tube of the elastic tube is 2.4 mm; specifically, the outer diameter of the catheter body 1 at one end away from the elastic tube 2 is 2.7mm, which is the largest and most suitable diameter for entering the blood vessel of the human body in the current design; on the other hand, considering that a small artery with a small diameter exists in a human body, such as the tibiofibular artery under the knee, the catheter main body 1 with the outer tube diameter of 2.7mm cannot be inserted, so that the design that the outer tube diameter of the elbow 20 on the elastic tube 2 is 2.5mm can suck thrombus deeply to the tibiofibular artery without damaging blood vessels;

in addition, the design that the pipe inner diameter of the catheter main body is 2.66mm and the pipe inner diameter of the elastic pipe is 2.4mm is convenient for air flow, so that the thrombus suction catheter has strong suction capacity as a whole, and the thrombus block in the blood vessel is convenient to suck.

Referring to fig. 5, the bending angle of the elbow 20 is α, wherein the α angle is 135 ° to 150 °, and the angle can be adjusted to 145 ° in the process of intubation, and 145 ° included angle is applicable to conventional patients, and the design of the angle facilitates the elbow 20 to enter into the bent blood vessel, improves the compliance of the elastic tube 2, and further improves the suction force to thrombus attached to the inner wall of the blood vessel.

Referring to fig. 1 to 5, the catheter body 1 is made of a polyester material, and the polyester material has a certain hardness and can improve the supporting force of the catheter body 1.

Referring to fig. 1 to 5, the elastic tube 2 is made of polyurethane material, and the outer surface of the elastic tube 2 is provided with a hydrophilic coating; thereby make the elasticity pipe 2 soft, hydrophilic, and then strengthen the compliance of elasticity pipe 2, reduce the impaired risk of vascular wall and venous valve.

Referring to fig. 4 to 6, the spiral wire loop 3 is made of a nickel-titanium alloy material, the nickel-titanium alloy is a shape memory alloy, the shape memory alloy is a special alloy which can automatically restore the self plastic deformation to the original shape at a certain specific temperature, and has good plasticity, so that the spiral wire loop 3 can constantly support the inner wall of the elastic tube 2 to prevent the elastic tube 2 from collapsing; and the nickel-titanium alloy material has high visibility under DSA perspective, and is convenient to observe.

On the other hand, the utility model provides a spiral wire circle 3 can adopt single helical structure or double helix structure, and 3 prices of single helical structure's spiral wire circle are relatively lower, and double helix structure's overall structure is comparatively stable, and the user can choose for use according to actual need.

Furthermore, the embodiment of the utility model provides an in, pipe main part length is 112cm, and 2 length of elastic tube are 20cm, and elbow 20 length is 4cm, and consequently, this thrombus suction pipe's overall length is 130cm, and this design can guarantee to be sufficient length when going on upper limbs artery thrombus suction through femoral artery intubate, accords with human vascular structure.

Referring to fig. 1, an end of the catheter main body 1 away from the elastic tube 2 is provided with an airflow valve head 10, a joint of the airflow valve head 10 is communicated with an external negative pressure suction device, and the airflow valve head 10 is a prior art, so the present invention is not described in detail.

It should also be noted that while the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The thrombus suction catheter is characterized by comprising a spiral wire coil (3), a catheter main body (1) and an elastic tube (2) communicated with one end of the catheter main body (1), wherein one end, far away from the catheter main body (1), of the elastic tube (2) is curled to one side to form an elbow (20); the spiral wire ring (3) is embedded on the inner side wall of the elastic pipe (2).

2. A thrombus aspiration catheter according to claim 1, wherein the catheter main body (1) is joined seamlessly with the elastic tube (2), and the outer tube diameters of the catheter main body (1) and the elastic tube (2) become gradually smaller in a direction away from the catheter main body (1).

3. A thrombectomy catheter according to claim 2, wherein the inner diameter of the tube of the catheter main body (1) is greater than or equal to the inner diameter of the elastic tube (2).

4. A thrombus aspiration catheter according to claim 3, wherein the catheter main body (1) has a tube outer diameter of 2.7mm at an end thereof remote from the elastic tube (2), and the bend (20) of the elastic tube (2) has a tube outer diameter of 2.5 mm; the inner diameter of the pipe of the catheter main body (1) is 2.66mm, and the inner diameter of the pipe of the elastic pipe (2) is 2.4 mm.

5. A thrombectomy catheter according to claim 1, wherein the bending angle of said elbow (20) is α, wherein the α angle is 135 ° to 150 °.

6. A thrombectomy catheter according to claim 1, wherein said catheter body (1) is made of polyester material.

7. A thrombectomy catheter according to claim 1, wherein said elastic tube (2) is made of polyurethane material and the outer surface of said elastic tube (2) is provided with a hydrophilic coating.

8. A thrombectomy catheter according to claim 1, wherein said spiral wire loop (3) is made of nitinol material and said spiral wire loop (3) adopts a double helix structure.

9. A thrombectomy catheter according to claim 1, wherein the catheter body (1) has a length of 112cm, the elastic tube (2) has a length of 20cm, and the elbow (20) has a length of 4 cm.

10. A thrombus suction catheter according to claim 1, characterized in that an end of the catheter main body (1) far from the elastic tube (2) is provided with an airflow valve head (10), and a joint of the airflow valve head (10) is communicated with an external negative pressure suction device.