CN211798167U

CN211798167U - High-performance guide catheter

Info

Publication number: CN211798167U
Application number: CN202020002875.6U
Authority: CN
Inventors: 张春艳; 魏世星; 高飞; 陈广涛; 周耀昌; 李鑫; 丁文博; 张明玺
Original assignee: Henan Tuoren Beisite Medical Devices Co ltd
Current assignee: Henan Tuoren Beisite Medical Devices Co ltd
Priority date: 2020-01-02
Filing date: 2020-01-02
Publication date: 2020-10-30
Anticipated expiration: 2030-01-02

Abstract

The utility model relates to the technical field of medical equipment, specifically disclose a high performance guide pipe, including pipe seat, stress buffer tube that connect gradually, turn round accuse pipe, anti roll over pipe, with axle pipe and hose, the stress buffer tube is the stereoplasm plastic tubing, turn round accuse pipe, anti roll over pipe and be soft plastic tubing with the axle pipe, the soft plastic tubing skin is equipped with the macromolecular material that has certain hardness, soft plastic tubing's inlayer is equipped with the polytetrafluoroethylene material. The turn round accuse pipe intermediate level be provided with the steel wire of steel wire weaving formation and compile the pipe, anti roll over the pipe with the material spiral that the pipe intermediate level was provided with certain hardness and toughness set up the skeleton of constituteing, the utility model discloses the utilization possesses the turn round accuse pipe of weaving the structure and possess anti roll over the pipe of spiral skeleton and with the axle pipe for the guide pipe has better compliance and coaxiality, does benefit to through tortuous blood vessel, has increased the practicality of guide pipe in clinical, has saved the time of operation.

Description

High-performance guide catheter

Technical Field

The utility model belongs to the technical field of the medical instrument technique and specifically relates to a high performance guide pipe is related to.

Background

The intravascular interventional diagnosis and treatment is a minimally invasive treatment mode, and with the progress of imaging equipment and the introduction and improvement of novel interventional equipment, vascular interventional doctors can treat more and more complex lesions, more and more cases are provided in clinical application, and the related disease types are more and more extensive in recent years. At present, the conventional guiding catheter is generally used for performing an endovascular intervention in clinic, and the supporting force of the guiding catheter plays a key role in clinical use. The supporting force of the guiding catheter refers to the capability of the guiding catheter to be firmly and stably connected with a coronary artery opening and keep good coaxiality so as to smoothly convey an interventional therapy instrument to a diseased blood vessel. The guide catheter is used for conveying various interventional treatment devices to a diseased region, and under the influence of acting force and counterforce, the force of pushing the devices forwards enables the guide catheter to obtain the trend of moving in the opposite direction, particularly for extremely twisted/calcified/angled arterial diseases, the counterforce trend is stronger, and the guide catheter is required to provide strong recoil support force to ensure the smooth operation of the interventional operation.

The clinical guide catheter that requires has higher compliance and higher holding power, and the guide catheter that clinical adoption at present is the braided structure of three-layer, and the skin is mostly the nylon material, and the inlayer is the PTFE material, and the intermediate level is 304 stainless steel. The prior structure limits the compliance and the anti-folding capability of the guiding catheter, especially in the branch part of the coronary artery, after the prior guiding catheter is used for treating the aorta of the coronary artery, the prior guiding catheter can not enter the branch of the coronary artery smoothly or can be folded after entering.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a high performance guiding catheter, which utilizes the anti-bending coaxial tube with a spiral skeleton to make the front end of the guiding catheter have better compliance and coaxiality, thereby facilitating the passing through the tortuous blood vessel, increasing the usability of the guiding catheter in clinic and saving the operation time.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a high-performance guide catheter comprises a catheter seat, a stress buffer tube, a torsion control tube, an anti-bending tube, a coaxial tube and a soft head tube which are sequentially connected, wherein the stress buffer tube is a hard plastic tube, the torsion control tube, the anti-bending tube and the coaxial tube are soft plastic tubes, each soft plastic tube is composed of an outer layer, a middle layer and an inner layer, the outer layer of each soft plastic tube is provided with a high polymer material with certain hardness, and the inner layer of each soft plastic tube is provided with a polytetrafluoroethylene material; the flexible plastic pipe intermediate level include the intermediate level of wrench movement control pipeline section, bending pipe section and coaxial pipeline section, wrench movement control pipeline intermediate level be provided with the steel wire braid pipe that the steel wire weaved the formation, bending pipe and coaxial pipeline intermediate level are provided with the skeleton that the material spiral setting of certain hardness and toughness constitutes.

As a further improvement of the utility model, the framework is a stainless steel spring.

As a further improvement of the utility model, the framework and the lap joint between the steel wire braided tubes

As a further improvement of the utility model, the length dimension of the torsion control pipe is 2-7 times of the sum of the length dimension of the anti-bending pipe and the length dimension of the coaxial pipe.

As a further improvement of the utility model, the steel wire braided tube is composed of flat steel wires, the height dimension of the cross section of the flat steel wires is 0.02-0.09mm, the width dimension is 0.06-0.25mm, the number of the wires is 16-32, and the number of each inch is 50-90.

As a further improvement of the utility model, the diameter of the section of the steel wire of the stainless steel spring is 0.025-0.1mm, and the pitch size of the spring is 0.2-0.8 mm.

The utility model has the advantages that:

the utility model discloses utilize the twist control pipe, anti roll over the major structure of pipe and coaxial pipe adopts the spiral and weave the mode that combines together, make the twist control pipe that is close to the conduit seat front end strengthen the holding power of guide pipe, keep away from the anti roll over pipe of conduit seat rear end and strengthened the compliance and the coaxiality of guide pipe with the coaxial pipe, it is low to solve guide pipe compliance among the prior art, the weak scheduling problem of resistance, especially in coronary artery operation, when especially the tortuous vasculogenesis of distal end is pathological change, make the guide pipe can be smooth through vascular acute angle bend, avoid secondary intubate and damage human organ tissue, the human security of guide pipe implantation has been guaranteed, strengthen its practicality in clinical, medical personnel's work efficiency has been improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of the structure of the present invention in a front view.

Fig. 2 is a schematic diagram of the point a enlarged structure of the present invention.

In the figure: the device comprises a catheter seat 1, a stress buffer tube 2, a torsion control tube 3, an anti-bending tube 4, a coaxial tube 5, a soft-end tube 6, a steel wire braided tube 7 and a framework 8.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the embodiments described are only some embodiments of the invention, and 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.

As shown in fig. 1 and 2, a high performance guide catheter includes a catheter hub 1, a stress buffer tube 2, a torsion control tube 3, an anti-bending tube 4, a coaxial tube 5 and a flexible head tube 6 which are connected in sequence. The catheter seat 1 is a standard luer connector and is used for being connected with external equipment such as a Y valve and the like, and convenience is provided for conveying various interventional instruments in a guide catheter; a stress buffer tube 2 is arranged between the catheter seat 1 and the torsion control tube 3, and the stress buffer tube 2 is a hard plastic tube and is a stress release part of the guide catheter. One end of the torsion control pipe 3, which is far away from the stress buffer pipe 2, is connected with an anti-bending pipe 4 and a coaxial pipe 5, the torsion control pipe 3, the anti-bending pipe 4 and the coaxial pipe 5 are soft plastic pipes, and each soft plastic pipe consists of an outer layer, a middle layer and an inner layer; the outer layer of the soft plastic pipe is provided with a high polymer material with certain hardness, and the high polymer material can be nylon, polyurethane or Pebax; the inner layer of the soft plastic pipe is provided with a polytetrafluoroethylene material; the middle layer of the flexible plastic pipe comprises a torsion control pipe 3, an anti-bending pipe 4 and a middle layer of a coaxial pipe 5, the middle layer of the torsion control pipe 3 is a steel wire braided pipe 7 formed by braiding steel wires, and sufficient supporting force can be provided under the condition that the size of the inner cavity of the guide pipe is ensured; a framework 8 which is formed by a material with certain hardness and toughness and is spirally arranged between the anti-bending pipe 4 and the coaxial pipe 5; the end part of the guide catheter is provided with a soft head tube 6, the soft head tube 6 is an embedded end, the prior art is adopted, and the soft head end can effectively avoid the damage of the instrument to the tissue.

Specifically, the bending-resistant pipe 4 and the coaxial pipe 5 are mainly different in hardness of the outer-layer polymer material, and the hardness of each part is as follows: the torsion control section 70D, the bending section 65D, the coaxial section 55D and the soft head section 45D are in Shore hardness.

In a specific embodiment, the frame 8 is a stainless steel spring, which can ensure the compliance and coaxiality of the guiding catheter and has the capability of resisting folding.

In a specific embodiment, the overlapping joint between the skeleton 8 and the steel wire braided tube 7 ensures both good compliance of the distal end of the guiding catheter far away from the catheter hub 1 and strong supporting force of the proximal end of the guiding catheter close to the catheter hub 1.

In a particular embodiment, the length dimension of the torsion control tube 3 is 2-7 times the sum of the length dimensions of the anti-kink tube 4 and the coaxial tube 5.

In a specific embodiment, the steel braid 7 is composed of flat steel wires having a cross-section with a height dimension of 0.02 to 0.09mm, a width dimension of 0.06 to 0.25mm, a number of wires of 16 to 32, and a number of wires per inch of 50 to 90. In practical application, the performance of the guide catheter can be achieved according to different knitting densities, so that the high compliance and coaxiality of the guide catheter are guaranteed, the strong supporting force of the guide catheter is guaranteed, the anti-bending performance of the far-end guide catheter is enhanced, and the clinical use performance is improved.

In a specific embodiment, the stainless steel spring has a wire cross-sectional diameter of 0.025-0.1mm and a pitch dimension of 0.2-0.8 mm.

The far end of the guide catheter far away from the catheter seat 1 is of a spring structure, so that the device has strong compliance and coaxiality, and after the guide catheter enters a human body, the bending condition is not easy to occur, the working efficiency of medical personnel is improved, and the guide catheter is ensured to smoothly enter a tortuous blood vessel at the far end. The near end of the guide catheter close to the catheter holder 1 is of a mesh-shaped braided structure of stainless steel wires, so that the hardness of the guide catheter is guaranteed, and when the guide catheter is continuously conveyed into a human body, enough supporting force is provided for the guide catheter, and the guide catheter is safely implanted.

It should be understood that the above detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirement is satisfied, the utility model is within the protection scope.

Claims

1. A high performance guide catheter, comprising: the stress buffer tube (2) is a hard plastic tube, the torsion control tube (3), the anti-bending tube (4) and the coaxial tube (5) are soft plastic tubes, the soft plastic tube is composed of an outer layer, a middle layer and an inner layer, the outer layer of the soft plastic tube is provided with a high polymer material with certain hardness, and the inner layer of the soft plastic tube is provided with a polytetrafluoroethylene material; the flexible plastic pipe intermediate level including turn round accuse pipe (3) section, anti pipe (4) section and the intermediate level of managing (5) section with the axle, turn round accuse pipe (3) intermediate level and be provided with the steel wire of steel wire weaving formation and compile pipe (7), anti pipe (4) and the material spiral that is provided with certain hardness and toughness with axle pipe (5) intermediate level set up skeleton (8) of constituteing.

2. A high performance guide catheter as in claim 1, wherein: the framework (8) is a stainless steel spring.

3. A high performance guide catheter as in claim 1, wherein: the framework (8) is in lap joint with the steel wire braided tube (7).

4. A high performance guide catheter as in claim 1, wherein: the length of the torsion control pipe (3) is 2-7 times of the sum of the length of the anti-bending pipe (4) and the length of the coaxial pipe (5).

5. A high performance guide catheter as in claim 1, wherein: the steel wire braided tube (7) is composed of flat steel wires, the height dimension of the cross section of each flat steel wire is 0.02-0.09mm, the width dimension of each flat steel wire is 0.06-0.25mm, the number of the steel wires is 16-32, and the number of the steel wires per inch is 50-90.

6. A high performance guide catheter as in claim 2, wherein: the diameter of the section of the steel wire of the stainless steel spring is 0.025-0.1mm, and the pitch size of the spring is 0.2-0.8 mm.