CN113144377A

CN113144377A - Distal access guiding catheter

Info

Publication number: CN113144377A
Application number: CN202110438260.7A
Authority: CN
Inventors: 孙丽娜; 毛玉兰; 蔡珂
Original assignee: Shenzhen Maipuqi Medical Technology Co ltd
Current assignee: Shenzhen Maipuqi Medical Technology Co ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2021-07-23

Abstract

The invention discloses a far-end passage guide catheter which comprises a PU outer tube, wherein one side of the PU outer tube is fixedly connected with a nylon outer tube, a marking ring is sleeved outside the nylon outer tube, a hydrophilic coating is arranged outside one side of the nylon outer tube, a connectable tube is arranged between a Ruhr joint and a stress buffering sleeve, and a stable supporting anti-deformation structure is arranged inside the PU outer tube. This distal end route guide pipe is through being provided with the intermediate level, the spring weaving layer, netted weaving and inner tube, during the use, the intermediate level that forms between inner tube and the outer tube provides the space for the packing of inside supporting layer, the spring weaving layer is nickel titanium alloy, netted weaving is netted SUS304V, the two supports each other, under the tough prerequisite in inside guaranteeing, the compliance of self has also obtained the assurance, can buckle in a flexible way in the blood vessel, realized the function of the stable support anti-deformation, the solution is that the device itself does not have the problem of the function of the stable support anti-deformation.

Description

Distal access guiding catheter

Technical Field

The invention relates to the technical field of medical instruments, in particular to a distal access guide catheter.

Background

With the development of science and technology and the progress of society, the medical technology also makes great progress, especially the continuous innovation of precise medical instruments, provides opportunities for the treatment of a plurality of difficult and complicated diseases, for example, the guide catheter is convenient for diseases such as thrombus and the like, the traditional guide catheter has poor toughness, the flexibility is ensured, the support property can not be maintained, the head part of the outer tube is hard, the mucous membrane in the blood vessel is easy to be damaged in the operation process, the joint is fixed and can not be disassembled, the flexibility is poor in a complex operation environment, the invention adjusts the problems, keeps the toughness of the pipeline by adding a plurality of layers of springs and alloy supporting layers inside, the hydrophilic coating is coated on the head of the outer tube to increase the lubricating property, reduce the friction between the catheter and the interior of the blood vessel, the connecting mode of the conduit and the joint is optimized, and the dismounting function is added on the premise of ensuring the sealing property.

In the process of implementing the invention, the inventor finds that at least the following problems in the prior art are not solved:

(1) in the traditional distal end passage guide catheter, the self-supporting property of the catheter is insufficient on the premise that the whole catheter is kept soft, the catheter is easy to excessively bend, and the function of stably supporting and preventing deformation is not provided;

(2) the traditional distal end passage guide catheter has a hard tip and poor lubricity, is easy to damage the mucous membrane in a blood vessel, and does not have the function of lubricating the tip to prevent the blood vessel from being scratched;

(3) the traditional distal end passage guide catheter has smooth joint, is easy to stick and slide by adhesion body fluid in the operation process, is difficult for medical staff to hold by wearing gloves, and does not have the function of preventing the joint from sliding.

Disclosure of Invention

The present invention aims to provide a distal end passage guiding catheter to solve the above-mentioned problems of the background art that the catheter does not have the function of stably supporting and preventing deformation.

In order to achieve the purpose, the invention provides the following technical scheme: distal end route guide pipe, including the PU outer tube, one side fixedly connected with nylon outer tube of PU outer tube, the mark ring has been cup jointed to the outside of nylon outer tube, the opposite side fixedly connected with stress buffering sleeve pipe of PU outer tube, one side of stress buffering sleeve pipe is provided with luer and connects, one side of luer connects is provided with leading-in sheath pipe, the one end of PU outer tube is provided with moulding needle, the outside of one side of nylon outer tube is provided with hydrophilic coating, luer connects and is provided with the connecting pipe between the stress buffering sleeve pipe, the inside of PU outer tube is provided with the stable deformation structure that supports.

The stable supporting anti-deformation structure comprises an inner tube, the inner tube is arranged inside a PU outer tube, a middle layer is arranged between the PU outer tube and the inner tube, a spring weaving layer is fixedly connected to the top end inside the middle layer, and a mesh-shaped weaving layer is fixedly connected to the bottom end inside the middle layer.

Preferably, the outer diameter of the spring braided layer is consistent with the inner diameter of the PU outer pipe, and the inner diameter of the net braided layer is consistent with the outer diameter of the inner pipe.

Preferably, connect anti-skidding structure to constitute by fixed cover, mounting groove, silica gel cushion and antiskid groove, fixed cover cup joints the upper and lower both ends that connect at luer respectively, the outside of fixed cover is provided with the mounting groove, the inside fixedly connected with silica gel cushion of mounting groove, the outside of silica gel cushion is provided with multiunit antiskid groove.

Preferably, the anti-slip grooves are arranged at equal intervals, and the fixing sleeves are symmetrically distributed about the transverse center line of the luer connector.

Preferably, the inner diameter of the introducing sheath is larger than the outer diameter of the luer connector.

Preferably, the outer diameter of the shaping needle is smaller than the inner diameter of the nylon outer tube.

Compared with the prior art, the invention has the beneficial effects that: the distal end passage guide catheter not only realizes the functions of stably supporting and preventing deformation, lubricating the tip and preventing scratching blood vessels, but also realizes the function of preventing the joint from skidding;

(1) by arranging the middle layer, the spring woven layer, the net woven layer and the inner tube, when the anti-deformation device, the middle layer formed between the inner tube and the outer tube provides a space for filling the inner supporting layer, the spring woven layer is made of nickel-titanium alloy, and the net woven layer is made of net SUS304V which are mutually supported;

(2) when the hydrophilic coating is arranged, when the catheter is inserted into a blood vessel, the nylon outer tube at the tip of the catheter directly contacts the inside of the blood vessel, and the hydrophilic coating of the methyl ethyl ether anhydrous maleic acid copolymer uniformly coated on the contact surface of the nylon outer tube and the blood vessel mucosa increases the hydrophilicity of the nylon outer tube, so that the nylon outer tube is more lubricated, the friction force between the tip and the blood vessel is reduced, the damage to the inside of the blood vessel is reduced, and the function of lubricating the tip and preventing the blood vessel from being scratched is realized;

(3) through being provided with fixed cover, mounting groove, silica gel cushion and antiskid groove, during the use, fixed cover cup joints in the outside that luer connects, and fixed cover and mounting groove are the fixed basis that provides of installation that the structure is holistic, and the silica gel cushion has strengthened medical staff and has held between the fingers the feeling of holding, and the antiskid groove on the silica gel cushion has increased frictional force, prevents to slide, has realized connecting skid-proof function.

Drawings

FIG. 1 is an exploded schematic view of a front cross-sectional structure of the present invention;

FIG. 2 is an enlarged side view of the anti-deformation structure of the stable support of the present invention;

FIG. 3 is an enlarged partial cross-sectional view taken at A in FIG. 1 according to the present invention;

fig. 4 is a side view enlarged structure diagram of the anti-slip structure of the joint of the present invention.

In the figure: 1. a PU outer pipe; 2. a nylon outer tube; 3. a hydrophilic coating; 4. a marker ring; 5. a stress buffer sleeve; 6. a connecting pipe; 7. a luer fitting; 8. introducing a sheath tube; 9. a shaping needle; 10. an intermediate layer; 11. a spring braid layer; 12. weaving in a net shape; 13. an inner tube; 14. a joint anti-slip structure; 1401. fixing a sleeve; 1402. mounting grooves; 1403. a silica gel cushion; 1404. and (4) an anti-slip groove.

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.

Example 1: referring to fig. 1-4, the distal end pathway guiding catheter comprises a PU outer tube 1, one side of the PU outer tube 1 is fixedly connected with a nylon outer tube 2, the exterior of the nylon outer tube 2 is sleeved with a marking ring 4, the other side of the PU outer tube 1 is fixedly connected with a stress buffering sleeve 5, one side of the stress buffering sleeve 5 is provided with a luer connector 7, one side of the luer connector 7 is provided with a guiding sheath tube 8, a connecting tube 6 is arranged between the luer connector 7 and the stress buffering sleeve 5, one end of the PU outer tube 1 is provided with a shaping needle 9, and the interior of the PU outer tube 1 is provided with a stable supporting anti-deformation structure;

referring to fig. 1-4, the distal end access guiding catheter further comprises a stable support anti-deformation structure, the stable support anti-deformation structure comprises an inner tube 13, the inner tube 13 is arranged inside the PU outer tube 1, a middle layer 10 is arranged between the PU outer tube 1 and the inner tube 13, a spring braid 11 is fixedly connected to the top end inside the middle layer 10, and a mesh braid 12 is fixedly connected to the bottom end inside the middle layer 10;

the outer diameter of the spring braided layer 11 is consistent with the inner diameter of the PU outer pipe 1, and the inner diameter of the net braided layer 12 is consistent with the outer diameter of the inner pipe 13;

the inner diameter of the inner tube 13 is larger than the outer diameter of the introducing sheath tube 8;

specifically, as shown in fig. 1 and 2, the intermediate layer 10 formed between the inner tube 13 and the outer tube provides a space for the inner supporting layer to be filled, the spring braid 11 is made of nickel-titanium alloy, the mesh braid 12 is made of mesh SUS304V, and the mesh SUS304V and the mesh braid are mutually supported, so that the flexibility of the mesh braid itself is ensured on the premise of ensuring the toughness of the inner portion, the mesh braid can be flexibly bent in a blood vessel, and the function of stably supporting and preventing deformation is realized.

Example 2: the outer part of one side of the nylon outer tube 2 is provided with a hydrophilic coating 3;

specifically, as shown in fig. 1 and 3, when the catheter is inserted into a blood vessel, the nylon outer tube 2 at the tip of the catheter directly contacts with the inside of the blood vessel, and the hydrophilic coating 3 of the methyl ethyl ether anhydrous maleic acid copolymer uniformly coated on the contact surface of the nylon outer tube 2 and the blood vessel mucosa increases the hydrophilicity of the nylon outer tube 2, so that the nylon outer tube is more lubricated, the friction force between the tip and the blood vessel is reduced, the damage to the inside of the blood vessel is reduced, and the function of lubricating the tip and preventing the blood vessel from being scratched is realized.

Example 3: the upper end and the lower end of the Ruhr joint 7 are respectively provided with a joint anti-slip structure 14, each joint anti-slip structure 14 consists of a fixed sleeve 1401, a mounting groove 1402, a silica gel cushion 1403 and an anti-slip groove 1404, the fixed sleeves 1401 are respectively sleeved at the upper end and the lower end of the Ruhr joint 7, the mounting groove 1402 is arranged outside the fixed sleeves 1401, the silica gel cushion 1403 is fixedly connected inside the mounting groove 1402, and a plurality of groups of anti-slip grooves 1404 are arranged outside the silica gel cushion 1403;

the anti-skid grooves 1404 are arranged at equal intervals, and the fixed sleeve 1401 is symmetrically distributed about the transverse center line of the luer connector 7;

specifically, as shown in fig. 1 and 4, the fixing sleeve 1401 is sleeved outside the luer connector 7, the fixing sleeve 1401 and the mounting groove 1402 provide a foundation for mounting and fixing the whole structure, the silica gel cushion 1403 enhances the hand feeling of holding by pinching of medical staff, and the anti-slip groove 1404 on the silica gel cushion 1403 increases the friction force, prevents slipping, and realizes the anti-slip function of the connector.

The inner diameter of the introducing sheath 8 is larger than the outer diameter of one side of the luer connector 7;

the outer diameter of the shaping needle 9 is smaller than the inner diameter of the nylon outer tube 2;

the working principle is as follows: when the catheter is used, firstly, when the catheter is inserted into a blood vessel, the hydrophilic coating 3 of the methyl ethyl ether anhydrous maleic acid copolymer uniformly coated on the contact surface of the nylon outer tube 2 and the blood vessel mucosa increases the hydrophilicity of the nylon outer tube 2, so that the nylon outer tube is more lubricated, the friction force between the tip and the blood vessel is reduced, the damage to the inside of the blood vessel is reduced, and the function of lubricating the tip and preventing the blood vessel from being scratched is realized; when the catheter advances in the blood vessel, the spring braided layer 11 between the inner tube 13 and the outer tube is made of nickel-titanium alloy, the net braided layer 12 is made of net SUS304V, and the two are mutually supported, so that the flexibility of the catheter is ensured on the premise of ensuring the toughness of the inner part, the catheter can be flexibly bent in the blood vessel, and the function of stably supporting and preventing deformation is realized; in the operation process, medical staff can hold between the fingers and hold the anti-skidding structure 14 that connects at luer 7 both ends, and silica gel cushion 1403 has strengthened medical staff and has held between the fingers feel of holding, and anti-skidding groove 1404 on silica gel cushion 1403 has increased frictional force, prevents to slide, has realized connecting skid-proof function.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. Distal end route guide catheter, including PU outer tube (1), its characterized in that: the anti-deformation PU tube is characterized in that a nylon outer tube (2) is fixedly connected to one side of the PU outer tube (1), a marking ring (4) is sleeved outside the nylon outer tube (2), a stress buffer sleeve (5) is fixedly connected to the other side of the PU outer tube (1), a luer joint (7) is arranged on one side of the stress buffer sleeve (5), a guiding sheath tube (8) is arranged on one side of the luer joint (7), a shaping needle (9) is arranged at one end of the PU outer tube (1), a hydrophilic coating (3) is arranged outside one side of the nylon outer tube (2), a connecting tube (6) is arranged between the luer joint (7) and the stress buffer sleeve (5), joint anti-skidding structures (14) are respectively arranged at the upper end and the lower end of the luer joint (7), and a stable supporting anti-deformation structure is arranged inside the PU outer tube (1);

the stable supporting deformation-preventing structure comprises an inner tube (13), wherein the inner tube (13) is arranged inside a PU outer tube (1), an intermediate layer (10) is arranged between the PU outer tube (1) and the inner tube (13), a spring weaving layer (11) is fixedly connected to the top end inside the intermediate layer (10), and a net weaving layer (12) is fixedly connected to the bottom end inside the intermediate layer (10).

2. The distal access guide catheter of claim 1, wherein: the outer diameter of the spring braided layer (11) is consistent with the inner diameter of the PU outer pipe (1), and the inner diameter of the net braided layer (12) is consistent with the outer diameter of the inner pipe (13).

3. The distal access guide catheter of claim 1, wherein: connect anti-skidding structure (14) to constitute by fixed cover (1401), mounting groove (1402), silica gel cushion (1403) and anti-skidding groove (1404), fixed cover (1401) cup joint respectively at the upper and lower both ends that luer connects (7), the outside of fixed cover (1401) is provided with mounting groove (1402), the inside fixedly connected with silica gel cushion (1403) of mounting groove (1402), the outside of silica gel cushion (1403) is provided with multiunit anti-skidding groove (1404).

4. The distal access guide catheter of claim 3, wherein: the anti-skidding grooves (1404) are arranged at equal intervals, and the fixing sleeves (1401) are symmetrically distributed about the transverse central line of the luer connector (7).

5. The distal access guide catheter of claim 1, wherein: the inner diameter of the leading-in sheath tube (8) is larger than the outer diameter of one side of the luer connector (7).

6. The distal access guide catheter of claim 1, wherein: the outer diameter of the shaping needle (9) is smaller than the inner diameter of the nylon outer tube (2).