CN113198084A

CN113198084A - Micro-catheter for peripheral vascular interventional therapy

Info

Publication number: CN113198084A
Application number: CN202110455386.5A
Authority: CN
Inventors: 蔡珂; 孙丽娜; 毛玉兰
Original assignee: Shenzhen Maipuqi Medical Technology Co ltd
Current assignee: Shenzhen Maipuqi Medical Technology Co ltd
Priority date: 2021-04-26
Filing date: 2021-04-26
Publication date: 2021-08-03

Abstract

The invention relates to the technical field of medical instruments and discloses a peripheral vascular interventional therapy microcatheter which comprises a tube body, wherein the tube body comprises a tail tube, a middle tube and a front tube, the tail tube, the middle tube and the front tube are communicated, and the tail tube, the middle tube and the front tube respectively comprise a hydrophilic coating of a methyl ethyl ether anhydrous maleic acid copolymer; according to the invention, the outer layer and the middle layer of the catheter body are made of polyamide elastomers, the inner layer is made of polytetrafluoroethylene, the braided mesh of the catheter body is made of stainless steel, the catheter seat is made of polycarbonate, the tail catheter is provided with a radiopaque marker made of platinum-iridium alloy, the tail catheter is coated with a hydrophilic coating of methyl ethyl ether-anhydrous maleic acid copolymer, the catheter body is designed by five sections of materials with different hardness in a segmented manner, the catheter seat is a transparent conical joint, and the catheter body is braided by stainless steel; the mode that the body inlayer was the polytetrafluoroethylene coating can reach little pipe and have good nature controlled, propelling movement nature, twistability, tracking nature, more is fit for being used for peripheral blood vessel interventional therapy.

Description

Micro-catheter for peripheral vascular interventional therapy

Technical Field

The invention relates to the technical field of medical instruments, in particular to a peripheral blood vessel interventional therapy micro-catheter.

Background

Peripheral blood vessels are mainly other than cardiovascular and cerebrovascular vessels, including trunk vessels, visceral vessels, and limb vessels, including arteries, veins, and capillaries therein. Microcatheters are often required for peripheral vascular therapy, and are used in radiological interventional diagnostic and therapeutic procedures for the delivery of contrast agents, pharmaceutical agents, embolic materials, and the like. Once the microcatheter has been advanced over the guidewire to the desired location, the microcatheter can be manipulated to selectively infuse diagnostic, embolic, or therapeutic agents into the blood vessel. The clinical manifestations of patients who need peripheral vascular intervention are that the elastic layer and muscular layer of the artery wall are destroyed, the elasticity of the vessel wall is reduced, etc., and the vessel wall of the patients is more fragile or thicker and harder.

The existing microcatheter is inconvenient to use, when a peripheral catheter is treated, a coronary artery or an intracardiac microcatheter is generally used, the microcatheter is small in inner cavity, poor in visibility under perspective, easy to fold the wall of the catheter, and easy to peel off a hydrophilic coating from the microcatheter, so that the operation of medical staff is influenced, the use difficulty is improved, the operation efficiency is reduced, the operation cannot be stretched, the length of the common catheter is fixed, catheters with different lengths need to be used according to the treatment position in the treatment process, a plurality of catheters with different lengths need to be prepared before treatment, the labor capacity is increased, the treatment cost is improved, the working efficiency is reduced, and in order to solve the existing problems, the peripheral vascular interventional treatment microcatheter is provided.

Disclosure of Invention

The invention aims to provide a peripheral vascular interventional therapy micro-catheter which has the advantages of convenience in use and capability of expansion and contraction, and solves the problems that the existing micro-catheter is inconvenient to use, when the peripheral catheter is treated, the commonly used micro-catheter in coronary artery or heart is small in inner cavity relative to the micro-catheter used for the periphery, poor visibility under perspective, easy to fold the catheter wall, easy to peel off a hydrophilic coating from the micro-catheter, the operation of medical personnel is influenced, the use difficulty is improved, the operation efficiency is reduced, the micro-catheter cannot expand and contract, the length of the common catheter is fixed, the catheters with different lengths are required to be used according to the treatment position in the treatment process, a plurality of catheters with different lengths are required to be prepared before treatment, the labor amount is increased, the treatment cost is improved, and the working efficiency is reduced.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a little pipe of peripheral vascular intervention treatment, includes the body, the body includes end pipe, well pipe and front tube, and communicates between end pipe, well pipe and the front tube, end pipe, well pipe and front tube all include methyl ethyl ether anhydrous maleic acid copolymer hydrophilic coating, polyamide elastomer layer, stainless steel woven mesh layer and polytetrafluoroethylene coating, the inner wall of end pipe embeds platinum iridium alloy radiopacifier, the one end of front tube intercommunication has first flexible pipe, the inside sliding connection of first flexible pipe has the flexible pipe of second, the inner wall of first flexible pipe embeds spacing head, be provided with the spring between the inner wall of spacing head and first flexible pipe, the spacing groove has been seted up on the surface of the flexible pipe of second, the other end intercommunication of the flexible pipe of second has the pipe seat.

Preferably, the surface of the second telescopic pipe is fixedly sleeved with a sealing ring, the sealing ring is positioned inside the first telescopic pipe, and the sealing ring is connected with the inner wall of the first telescopic pipe in a sliding manner.

Preferably, the catheter seat is conical, the catheter seat is made of transparent glass, and the thickness of the catheter seat is 2 mm.

Preferably, an anti-slip layer is bonded on the surface of the first extension tube, and the anti-slip layer is made of rubber.

Preferably, the pipe body adopts a multi-section structure, and the hardness of the tail pipe, the middle pipe and the front pipe is gradually hardened.

Preferably, one end of the catheter base is communicated with a joint, the surface of the joint is provided with threads, and the joint is made of polycarbonate.

Preferably, the hydrophilic coating of methyl ethyl ether anhydrous maleic acid copolymer is on the outside of a polyamide elastomer layer, which is on the outside of a woven stainless steel mesh layer, which is on the outside of a polytetrafluoroethylene coating.

Preferably, the thickness of the hydrophilic coating layer of the methyl ethyl ether anhydrous maleic acid copolymer is 0.2 to 0.5 μm, the thickness of the polyamide elastomer layer is 0.2mm, the thickness of the stainless steel woven mesh layer is 0.5mm, and the thickness of the polytetrafluoroethylene coating layer is 0.4 to 0.6 μm.

Compared with the prior art, the invention provides a peripheral vascular interventional therapy micro-catheter which has the following beneficial effects:

1. according to the invention, the outer layer and the middle layer of the catheter body are made of polyamide elastomers, the inner layer is made of polytetrafluoroethylene, the braided mesh of the catheter body is made of stainless steel, the catheter seat is made of polycarbonate, the tail catheter is provided with a radiopaque marker made of platinum-iridium alloy, the tail catheter is coated with a hydrophilic coating of methyl ethyl ether-anhydrous maleic acid copolymer, the catheter body is designed by five sections of materials with different hardness in a segmented manner, the catheter seat is a transparent conical joint, and the catheter body is braided by stainless steel; the inner layer of the tube body is a polytetrafluoroethylene coating, so that the micro-catheter has good controllability, pushability, torsion and trackability, and is more suitable for peripheral vascular interventional therapy;

2. the telescopic catheter has the advantages that the telescopic distance of the second telescopic pipe in the first telescopic pipe is adjusted, and the limiting head is matched with the first telescopic pipe to fix the second telescopic pipe under the action of the spring, so that the telescopic catheter can be stretched, the labor amount is reduced, the treatment cost is reduced, and the working efficiency is improved.

Drawings

FIG. 1 is a perspective view of the structure of the present invention;

FIG. 2 is a cross-sectional view of the structure of the present invention;

FIG. 3 is a cross-sectional view of a portion of the present invention;

FIG. 4 is an enlarged view of the structure of FIG. 2.

In the figure: 1. a pipe body; 2. a final pipe; 3. a middle tube; 4. a head tube; 5. a hydrophilic coating of a methyl ethyl ether anhydrous maleic acid copolymer; 6. a polyamide elastomer layer; 7. a stainless steel braided mesh layer; 8. a polytetrafluoroethylene coating; 9. a platinum iridium alloy radiopaque marker; 10. a first telescopic tube; 11. a second telescopic tube; 12. a limiting head; 13. a spring; 14. a limiting groove; 15. a catheter hub; 16. a seal ring; 17. an anti-slip layer; 18. a joint; 19. and (4) threading.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, a peripheral blood vessel interventional therapy microcatheter comprises a tube body 1, the tube body 1 comprises a tail tube 2, a middle tube 3 and a front tube 4, the tail tube 2, the middle tube 3 and the front tube 4 are communicated, the tail tube 2, the middle tube 3 and the front tube 4 all comprise a methyl ethyl ether anhydrous maleic acid copolymer hydrophilic coating 5, a polyamide elastomer layer 6, a stainless steel woven mesh layer 7 and a polytetrafluoroethylene coating 8, a platinum iridium alloy radiopaque marker 9 is embedded in the inner wall of the tail tube 2, one end of the front tube 4 is communicated with a first telescopic tube 10, the inside of the first telescopic tube 10 is connected with a second telescopic tube 11 in a sliding manner, a limiting head 12 is embedded in the inner wall of the first telescopic tube 10, a spring 13 is arranged between the limiting head 12 and the inner wall of the first telescopic tube 10, a limiting groove 14 is formed in the surface of the second telescopic tube 11, the other end of the second telescopic tube 11 is communicated with a catheter seat, the catheter comprises a catheter body 1, a catheter seat 15, a tip tube 2, a hydrophilic coating 5 of methyl ethyl ether anhydrous maleic acid copolymer, a transparent conical joint 18 and a catheter seat 1, wherein the outer layer and the middle layer of the catheter body 1 are made of polyamide elastomers, the inner layer is made of polytetrafluoroethylene, a catheter body woven mesh is made of stainless steel, the material of the catheter seat 15 is polycarbonate, the tip tube 2 is provided with a radiopaque marker made of platinum-iridium alloy, the tip tube 2 is coated with the hydrophilic coating 5 of methyl ethyl ether anhydrous maleic acid copolymer, the catheter body 1 is designed by five sections of materials with different hardness in a segmented mode, the catheter seat 15 is a transparent conical joint 18, and the catheter body 1 is woven by stainless steel; the mode that body 1 inlayer is polytetrafluoroethylene coating 8 can reach the microcatheter and have good nature controlled, propelling movement nature, twisting nature, tracking nature, more is fit for being used for the treatment of peripheral blood vessel intervention, through adjusting the flexible distance of second flexible pipe 11 in first flexible pipe 10 and cooperation stopper 12 to its fixed mode under the effect of spring 13, can reach the flexible purpose of pipe, has reduced the amount of labour, has reduced the cost of treatment, has improved work efficiency.

Further, a sealing ring 16 is fixedly sleeved on the surface of the second extension tube 11, the sealing ring 16 is located inside the first extension tube 10, the sealing ring 16 is slidably connected with the inner wall of the first extension tube 10, and the leakage phenomenon between the first extension tube 10 and the second extension tube 11 is prevented by the sealing ring 16.

Further, pipe seat 15 is the toper, and pipe seat 15 is the transparent glass material, and pipe seat 15's thickness is 2mm, is the toper through setting up pipe seat 15, and pipe seat 15 is the transparent glass material, and pipe seat 15's thickness is 2mm, makes plug material etc. clear visible when getting into the microcatheter.

Further, the surface of the first extension tube 10 is bonded with an anti-slip layer 17, the anti-slip layer 17 is made of rubber, and the anti-slip layer 17 is arranged to prevent hand slip during adjustment and facilitate operation.

Further, body 1 adopts the multistage formula structure, and the hardness of end pipe 2, well pipe 3 and head tube 4 is stiffened gradually, and through setting up multistage formula structure and hardness stiffened gradually, the reducible microcatheter of soft end pipe 2 is put into the in-process, to the damage of peripheral vascular wall, well pipe 3 and head tube 4 are stiffened gradually and are made the pipe have excellent propelling movement nature and tracking nature.

Furthermore, one end of the catheter seat 15 is communicated with a joint 18, threads 19 are formed on the surface of the joint 18, the joint 18 is made of polycarbonate, and the joint 18 and the threads 19 are arranged to facilitate connection.

Further, a hydrophilic coating 5 of methyl ethyl ether anhydrous maleic acid copolymer is provided on the outside of the polyamide elastomer layer 6, the polyamide elastomer layer 6 is provided on the outside of the stainless steel woven mesh layer 7, and the stainless steel woven mesh layer 7 is provided on the outside of the polytetrafluoroethylene coating 8.

Further, the thickness of the hydrophilic coating layer 5 of methyl ethyl ether anhydrous maleic acid copolymer is 0.2 to 0.5 μm, the thickness of the polyamide elastomer layer 6 is 0.2mm, the thickness of the stainless steel woven mesh layer 7 is 0.5mm, and the thickness of the polytetrafluoroethylene coating layer 8 is 0.4 to 0.6 μm.

When the micro catheter is used, the methyl ethyl ether anhydrous maleic acid copolymer hydrophilic coating 5 is arranged on the outer surface of the micro catheter, smooth movement in a blood vessel is facilitated, the polytetrafluoroethylene coating 8 is arranged in the cavity, selective intubation is easier to perform, and the delivery of a contrast agent, an embolization material and a medicinal preparation is facilitated; the second telescopic pipe 11 is pulled outwards, the limiting head 12 is separated from the limiting groove 14 to be clamped with the limiting groove 14 under the action of external force, after the second telescopic pipe 11 is pulled to a proper length, the second telescopic pipe 11 stops being pulled, the limiting head 12 is clamped with the limiting groove 14 under the action of the spring 13, the purpose of fixing the extending length of the second telescopic pipe is achieved, and therefore the purpose of telescopic adjustment of the guide pipe is achieved.

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

Claims

1. A peripheral vascular intervention treatment microcatheter, includes body (1), its characterized in that: the tube body (1) comprises a tail tube (2), a middle tube (3) and a front tube (4), the tail tube (2), the middle tube (3) and the front tube (4) are communicated, the tail tube (2), the middle tube (3) and the front tube (4) respectively comprise a methyl ethyl ether anhydrous maleic acid copolymer hydrophilic coating (5), a polyamide elastomer layer (6), a stainless steel woven net layer (7) and a polytetrafluoroethylene coating (8), a platinum iridium alloy radiopaque marker (9) is embedded in the inner wall of the tail tube (2), one end of the front tube (4) is communicated with a first telescopic tube (10), a second telescopic tube (11) is connected to the inside of the first telescopic tube (10) in a sliding mode, a limiting head (12) is embedded in the inner wall of the first telescopic tube (10), a spring (13) is arranged between the limiting head (12) and the inner wall of the first telescopic tube (10), and a limiting groove (14) is formed in the surface of the second telescopic tube (11), the other end of the second extension tube (11) is communicated with a conduit seat (15).

2. The microcatheter of claim 1, wherein: and a sealing ring (16) is fixedly sleeved on the surface of the second telescopic pipe (11), the sealing ring (16) is positioned inside the first telescopic pipe (10), and the sealing ring (16) is connected with the inner wall of the first telescopic pipe (10) in a sliding manner.

3. The microcatheter of claim 1, wherein: the catheter seat (15) is conical, the catheter seat (15) is made of transparent glass, and the thickness of the catheter seat (15) is 2 mm.

4. The microcatheter of claim 1, wherein: the surface of the first extension pipe (10) is bonded with an anti-slip layer (17), and the anti-slip layer (17) is made of rubber.

5. The microcatheter of claim 1, wherein: the pipe body (1) adopts a multi-section structure, and the hardness of the tail pipe (2), the middle pipe (3) and the front pipe (4) is gradually hardened.

6. The microcatheter of claim 1, wherein: one end of the conduit seat (15) is communicated with a joint (18), the surface of the joint (18) is provided with threads (19), and the joint (18) is made of polycarbonate.

7. The microcatheter of claim 1, wherein: the hydrophilic coating (5) of methyl ethyl ether anhydrous maleic acid copolymer is located on the outside of a polyamide elastomer layer (6), the polyamide elastomer layer (6) is located on the outside of a stainless steel woven mesh layer (7), and the stainless steel woven mesh layer (7) is located on the outside of a polytetrafluoroethylene coating (8).

8. The microcatheter of claim 1, wherein: the thickness of the methyl ethyl ether anhydrous maleic acid copolymer hydrophilic coating (5) is 0.2-0.5 mu m, the thickness of the polyamide elastomer layer (6) is 0.2mm, the thickness of the stainless steel woven mesh layer (7) is 0.5mm, and the thickness of the polytetrafluoroethylene coating (8) is 0.4-0.6 mu m.