CN216294959U

CN216294959U - Composite catheter

Info

Publication number: CN216294959U
Application number: CN202122508024.6U
Authority: CN
Inventors: 程玉涛
Original assignee: Shanghai Li Kai Technology Co ltd
Current assignee: Shanghai Li Kai Technology Co ltd
Priority date: 2021-10-18
Filing date: 2021-10-18
Publication date: 2022-04-15
Anticipated expiration: 2031-10-18

Abstract

The present application relates to a composite catheter comprising a first outer tube, a second outer tube, and a support layer. The connecting end of the first outer layer pipe is arranged in a conical shape. The shape of the inner side wall of the connecting end of the second outer layer pipe is matched with the outer side wall of the connecting end of the first outer layer pipe, and the second outer layer pipe is used for being connected with the connecting end of the first outer layer pipe. The supporting layer sets up the inside behind first outer pipe and the intercommunication of second outer pipe, and the supporting layer all is connected the setting with the inner wall of first outer pipe, the cylindrical inner wall of second outer pipe. Through designing the link outside of first outer layer pipe and the link inboard of second outer layer pipe for the toper respectively, the effectual area of contact that has increased the link makes the junction after the thermal current becomes the connection more firm. Through setting up the supporting layer, the effectual anti deformability who improves the junction makes the junction can not break off because of the deformation degree is too big when buckling. Effectively changes the transition of connection with different hardness between the outer layer pipes, and makes the transition smoother and more abrupt.

Description

Composite catheter

Technical Field

The application relates to the field of medical equipment, in particular to a composite catheter.

Background

When a catheter of the existing medical instrument, a distal end passage catheter of a microcatheter and the like are inserted into a peripheral composite catheter, the material of the outer layer of the catheter is mostly formed by rheologic of high polymer catheters with different hardness, the hardness change of the connecting part of each catheter is abrupt in the manufacturing process, and the outer layer is easy to break after the connecting part of each section is bent.

How to prolong the service life of a joint after thermo-rheological connection of two conduits with different hardness becomes a problem to be solved urgently by the technical personnel in the field.

Disclosure of Invention

In view of this, the present application provides a composite conduit, wherein an outer cone and an inner cone are respectively formed at the connecting ends of two conduits, and a supporting layer is disposed at the connecting position of the inner walls of the two conduits after the two conduits are connected, so that the service life of the connecting position of the two conduits after the two conduits are connected by the thermo-rheological connection is longer.

According to an aspect of the present application, there is provided a composite catheter comprising a first outer tube, a second outer tube, and a support layer;

the connecting end of the first outer layer pipe is arranged in a conical shape;

the shape of the inner side wall of the connecting end of the second outer layer pipe is matched with that of the outer side wall of the connecting end of the first outer layer pipe; and is

The connecting end of the second outer layer pipe is connected with the connecting end of the first outer layer pipe;

the supporting layer is arranged in the first outer layer pipe and the second outer layer pipe after being communicated, and the supporting layer is connected with the inner wall of the first outer layer pipe and the cylindrical inner wall of the second outer layer pipe.

In one possible implementation, the inner diameter of the first outer tube is the same as the inner diameter of the cylindrical inner wall of the second outer tube.

In one possible implementation, the first outer tube has a hardness greater than the hardness of the second outer tube.

In one possible implementation, the supporting layer is of a braided structure or a wound spring structure.

In a possible implementation manner, the material of the supporting layer is metal.

In one possible implementation, the device further comprises an inner layer pipe;

the inner pipe is arranged inside the supporting layer, and the outer side wall of the inner pipe is connected with the inner side wall of the supporting layer.

In a possible implementation manner, the material of the inner-layer tube is polytetrafluoroethylene.

In one possible implementation, the length of the support layer in the length direction is greater than the taper height of the connecting end of the first outer tube.

In one possible implementation, the first outer tube has a cylindrical outer diameter dimension that is the same as the outer diameter dimension of the second outer tube.

In one possible implementation, the first outer tube and the second outer tube are both thermoplastic materials.

Through the inboard design of the link outside with first outer pipe and the link of second outer pipe respectively for the toper, the effectual area of contact that has increased first outer pipe and second outer pipe makes first outer pipe and second outer union coupling department after the thermorheological connection more firm. The supporting layer is arranged on the inner wall of the joint of the first outer-layer pipe and the second outer-layer pipe, so that the deformation resistance of the joint is effectively improved, and the joint cannot break due to too large deformation degree when being bent. Effectively changes the transition of connection with different hardness between the outer layer pipes, and makes the transition smoother and more abrupt.

Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the application and, together with the description, serve to explain the principles of the application.

FIG. 1 illustrates a body structure view of a composite catheter of an embodiment of the present application;

fig. 2 is a main body structural view of a first outer tube according to an embodiment of the present application;

FIG. 3 is a view showing a main body structure of a second outer pipe according to the embodiment of the present application;

fig. 4 shows a partial cross-sectional view of a composite catheter of an embodiment of the present application.

Detailed Description

Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

It will be understood, however, that the terms "central," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing or simplifying the description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present application.

FIG. 1 illustrates a body structure view of a composite catheter according to an embodiment of the present application; FIG. 2 illustrates a body structure view of a first outer tube according to an embodiment of the present application; FIG. 3 illustrates a body structure view of a second outer tube according to an embodiment of the present application; FIG. 4 illustrates a partial cross-sectional view of a composite catheter according to an embodiment of the present application. As shown in fig. 1, 2 and 3, the composite conduit includes: a first outer tube 100, a second outer tube 200, and a support layer 300. The connection end of the first outer tube 100 is tapered. The shape of the inner side wall of the connection end of the second outer pipe 200 matches with the shape of the outer side wall of the connection end of the first outer pipe 100. And the connection end of the second outer tube 200 is connected with the connection end of the first outer tube 100. The support layer 300 is disposed inside the first outer layer tube 100 and the second outer layer tube 200 after being communicated, and the support layer 300 is connected to both the inner wall of the first outer layer tube 100 and the cylindrical inner wall of the second outer layer tube 200.

The outer side of the connecting end of the first outer layer pipe 100 and the inner side of the connecting end of the second outer layer pipe 200 are designed to be conical, so that the contact area of the first outer layer pipe 100 and the second outer layer pipe 200 is effectively increased, and the connecting part of the first outer layer pipe 100 and the second outer layer pipe 200 after thermo-rheological connection is firmer. The inner wall of the joint of the first outer layer pipe 100 and the second outer layer pipe 200 is provided with the support layer 300, so that the deformation resistance of the joint is effectively improved, and the joint cannot break due to too large deformation degree when being bent. Effectively changes the transition of connection with different hardness between the outer layer pipes, and makes the transition smoother and more abrupt.

Here, it should be noted that although the composite catheter is described above by taking fig. 1 as an example, those skilled in the art will understand that the present application should not be limited thereto. In fact, the user can flexibly set the shape of the connection end of the first outer tube 100 and the shape of the connection end of the second outer tube 200 according to personal preference and/or practical application scenarios, as long as the connection end of the second outer tube 200 is wrapped around the connection end of the first outer tube 100.

In a possible implementation manner, the inner diameter of the first outer layer tube 100 is the same as the inner diameter of the cylindrical inner wall of the second outer layer tube 200, so that the joint between the inner wall of the first outer layer tube 100 and the inner wall of the second outer layer tube 200 is flat, the support layer 300 is convenient to arrange, and the support layer 300 is in full contact with the inner wall of the first outer layer tube 100 and the inner wall of the second outer layer tube 200, thereby improving the support effect.

In one possible implementation, the first outer tube 100 has a hardness greater than the hardness of the second outer tube 200. After the first outer layer pipe 100 and the second outer layer pipe 200 are connected through the thermo-rheological process, when the joint of the first outer layer pipe 100 and the second outer layer pipe 200 is bent, the hardness is low, the second outer layer pipe 200 with high elasticity is arranged on the outermost layer, the deformation is more, the bending limit of the conduit can be improved, and the risk of fracture of the joint of the first outer layer pipe 100 and the second outer layer pipe 200 can be reduced.

In one possible implementation, the support layer 300 is a braided structure or a wound spring structure. The supporting layer of the braided structure or the coiled spring structure can support the joint of the first outer layer pipe 100 and the second outer layer pipe 200, so that the deformation degree of the joint is reduced, the risk of fracture of the joint is reduced, the composite pipe can be bent, and the normal use of the composite pipe is not influenced.

In one possible implementation, the material of the support layer 300 is metal. The metal material further improves the supporting effect of the supporting layer 300.

In one possible implementation, as shown in fig. 4, an inner tube 400 is also included. The inner tube 400 is disposed inside the support layer 300, and the outer sidewall of the inner tube 400 is connected to the inner sidewall of the support layer 300. Because the supporting layer 300 is a woven structure or a spring winding structure, the inner wall is rough, the flow of fluid in the composite conduit can be influenced, and the inner wall of the supporting layer 300 is provided with the inner-layer tube 400, so that the fluid can not directly contact the supporting layer 300 when contacting with the inner wall of the inner-layer tube 400, and the smooth flow of the fluid is ensured. Furthermore, the fluid in the composite conduit may corrode the support layer 300 made of a metal material, and the fluid does not contact the support layer 300 by the inner pipe 400, thereby prolonging the service life of the support layer 300.

In one possible implementation, the inner tube 400 is made of teflon. The polytetrafluoroethylene has good heat resistance and cold resistance, the application range of the application is expanded, meanwhile, the polytetrafluoroethylene also has good corrosion resistance, and the service life of the application is prolonged.

In one possible implementation, the body length of the support layer 300 is greater than the taper height of the connection end of the first outer tube 100. The tapered outer side wall of the connection end of the first outer layer pipe 100 is adapted to be connected with the inner side wall of the connection end of the second outer layer pipe 200, and thermo-rheological processing is performed after connection, so that the connection position of the first outer layer pipe 100 and the second outer layer pipe 200 is the tapered outer side wall of the connection end of the first outer layer pipe 100, the length of the support layer 300 in the length direction is greater than the tapered height of the connection end of the first outer layer pipe 100, the support layer 300 can cover the connection position of the first outer layer pipe 100 and the second outer layer pipe 200, and the support effect of the support layer 300 is ensured.

Here, it should be noted that the length of the inner tube 400 in the length direction is greater than the length of the support layer 300 in the length direction, so that the inner tube 400 can cover the entire support layer 300, and the inner tube 400 can protect the support layer 300.

In a possible implementation manner, the cylindrical outer diameter of the first outer layer pipe 100 is the same as the outer diameter of the second outer layer pipe 200, so that the joint of the first outer layer pipe 100 and the second outer layer pipe 200 is in smooth transition, the applicability of the composite conduit is not affected, the thermo-rheological connection effect is improved, and the risk of fracture at the joint is reduced.

In one possible implementation, the first outer tube 100 and the second outer tube 200 are both thermoplastic materials, so that the first outer tube 100 and the second outer tube 200 can be connected by thermo-rheological.

Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A composite catheter is characterized by comprising a first outer layer tube, a second outer layer tube and a supporting layer;

2. The composite catheter of claim 1, wherein the first outer tube has an inner diameter dimension that is the same as an inner diameter dimension of the cylindrical inner wall of the second outer tube.

3. The composite catheter of claim 1, wherein the first outer tube has a durometer greater than the durometer of the second outer tube.

4. The composite catheter of claim 1, wherein the support layer is a braided structure or a wound spring structure.

5. The composite catheter of claim 4, wherein the support layer is made of metal.

6. The composite catheter of claim 4, further comprising an inner tube;

7. The composite catheter of claim 6, wherein the inner tube is made of polytetrafluoroethylene.

8. The composite catheter of claim 1, wherein the support layer has a length in the lengthwise direction that is greater than the taper height of the coupling end of the first outer tube.

9. The composite catheter of claim 1, wherein the first outer tube has a cylindrical outer diameter dimension that is the same as an outer diameter dimension of the second outer tube.

10. The composite catheter of any of claims 1 to 9, wherein the first outer tube and the second outer tube are both thermoplastic materials.