CN218129554U - Pipe body of double-cavity micro-catheter and double-cavity micro-catheter - Google Patents

Abstract

The utility model belongs to the field of interventional medical instruments, in particular to a tube body of a double-cavity micro-catheter and the double-cavity micro-catheter, wherein the tube body comprises an outer sleeve layer, an outer sleeve reinforced layer and a double-cavity tube body, and the outer sleeve layer and the outer sleeve reinforced layer are sequentially sleeved outside the double-cavity tube body from outside to inside; the double-cavity pipe body comprises a main woven net pipe and a branch woven net pipe which are arranged side by side, and a main lining layer and a branch lining layer which are respectively arranged in the main woven net pipe and the branch woven net pipe. The pipe body is provided with the main woven net pipe branch woven net pipe outside the main lining layer and the branch lining layer respectively, the outer sleeve reinforcing layer is arranged between the outer sleeve layer and the double-cavity pipe body, the main woven net pipe supports the main guide wire cavity, the branch woven net pipe supports the branch guide wire cavity, the main woven net pipe and the branch woven net pipe support through the outer sleeve reinforcing layer, the bending resistance of the pipe body is improved, and the double-cavity micro-catheter is not prone to bending in the using process.

Description

Pipe body of double-cavity micro-catheter and double-cavity micro-catheter

Technical Field

The utility model relates to an intervention formula medical instrument technical field especially relates to a pipe shaft and two-chamber pipe a little of pipe of two-chamber pipe a little.

Background

In coronary intervention, bifurcation lesions account for approximately 20%, coronary Bifurcation lesions (Bifurcation) meaning that more than 50% of the stenosis is present in the coronary artery adjacent to and/or affecting the opening of the vital branch vessels. Atherosclerosis is likely to occur at the bifurcation of a blood vessel due to increased turbulence and shear forces in the blood flow.

In the process of bifurcation lesion intervention, in order to improve the success rate of guide wire crossing, a micro-catheter and a guide wire are usually required to be used in a matching way, and in the process of operation, the micro-catheter needs to be pushed to a lesion position from the outside of a body, so that the micro-catheter is required to have strong pushing performance, twisting control performance, flexibility and bending resistance. However, the tube body of the existing micro-catheter is usually made of high polymer materials, and is easy to bend in the using process, so that the bending resistance of the micro-catheter is reduced.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a pipe shaft and two-chamber pipe a little of pipe of two-chamber pipe aims at improving the anti bending performance of pipe a little.

Therefore, according to one aspect of the application, a double-cavity micro catheter body is provided, which comprises an outer sleeve layer, an outer sleeve reinforcing layer and a double-cavity catheter body, wherein the outer sleeve layer and the outer sleeve reinforcing layer are sequentially sleeved outside the double-cavity catheter body from outside to inside;

the double-cavity pipe body comprises a main woven net pipe and a branch woven net pipe which are arranged side by side, and a main lining layer and a branch lining layer which are respectively arranged in the main woven net pipe and the branch woven net pipe;

a main guide wire cavity and a branch guide wire cavity are respectively formed in the main lining layer and the branch lining layer, a main guide wire inlet and a branch guide wire inlet are respectively formed in the main guide wire cavity and the branch guide wire cavity at the near end of the outer sleeve layer, and a main guide wire outlet and a branch guide wire outlet are respectively formed in the main guide wire cavity and the branch guide wire cavity at the far end of the outer sleeve layer.

Optionally, the outer reinforcing layer is of a braided or spiral wound construction.

Optionally, the far ends of the main woven mesh pipe and the branch woven mesh pipe extend out of the far end of the outer sleeve reinforcing layer.

Optionally, the outer reinforcement layer is a braided structure with a braiding density gradually decreasing from the distal end to the proximal end, or the outer reinforcement layer is a spiral winding structure with a pitch gradually decreasing from the distal end to the proximal end;

the main weaving net pipe and the branch weaving net pipe are weaving structures with weaving density gradually reduced from a far end to a near end.

Optionally, the hardness of the outer jacket layer increases from the distal end to the proximal end.

Optionally, the outer wall of the outer jacket layer is provided with a main guide wire side inlet communicated with the main guide wire cavity and a branch guide wire side inlet communicated with the branch guide wire cavity, and the main guide wire side inlet and the branch guide wire side inlet are arranged at intervals in the length direction of the tube body.

Optionally, the front end of the outer jacket layer is provided with an arc-shaped guide portion, and the guide wire extending out of the branch guide wire outlet is abutted against the arc-shaped guide portion and then changes direction so as to form an included angle with the main guide wire outlet.

Optionally, the double-lumen microcatheter further comprises an X-ray opaque visualization marker, and the visualization markers are embedded at the outlet of the main guide wire and the outlet of the branch guide wire.

According to another aspect of the present application, there is provided a double lumen microcatheter comprising a shaft as described above.

Optionally, the double-lumen micro catheter further comprises a main luer base, a branch luer base and a stress relief tube, the main luer base is arranged at the proximal end of the catheter body and is communicated with the main guide wire inlet, the branch luer base is arranged at the proximal end of the catheter body and is communicated with the branch guide wire inlet, and the stress relief tube is sleeved outside the joint of the main luer base and the catheter body and the joint of the branch luer base and the catheter body.

The application provides a pipe shaft of little pipe of two-chamber and little pipe of two-chamber's beneficial effect lie in: compared with the prior art, the pipe body of the double-cavity micro-catheter is provided with the main woven net pipe branch woven net pipe outside the main lining layer and the branch lining layer respectively, the outer sleeve reinforcing layer is arranged between the outer sleeve layer and the double-cavity pipe body, the main woven net pipe supports the main guide wire cavity, the branch woven net pipe supports the branch guide wire cavity, the main woven net pipe and the branch woven net pipe support through the outer sleeve reinforcing layer, the bending resistance of the pipe body is improved, and the double-cavity micro-catheter is not prone to bending in the using process.

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 description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Wherein:

fig. 1 is a schematic view of a tube body structure of a double-lumen microcatheter according to an embodiment of the present invention;

FIG. 2 isbase:Sub>A sectional view taken along line A-A of FIG. 1;

fig. 3 is a schematic, partially cross-sectional view of the shaft of a double lumen microcatheter in accordance with an embodiment of the present invention;

fig. 4 is a schematic view of a portion of a tube body of a double lumen microcatheter according to an embodiment of the present invention;

fig. 5 is a schematic view of a portion of a tube body of a double lumen microcatheter according to another embodiment of the present invention;

fig. 6 is a schematic view of a double lumen microcatheter according to an embodiment of the present invention;

fig. 7 is another schematic view of a double lumen microcatheter according to an embodiment of the invention.

Description of the main element symbols:

10. a tube body; 11. a main guide wire inlet; 12. a branch guide wire inlet; 13. a main guide wire outlet; 14. a branch guide wire outlet;

20. a primary luer mount;

30. branching a luer base;

40. stress removing pipes;

100. an outer jacket layer; 101. a main guide wire side inlet; 102. a branch guide wire side inlet; 110. an arc-shaped guide part;

200. a reinforcing layer is sleeved outside;

300. a double-cavity tube body; 301. a main guide wire cavity; 302. a guide wire cavity is branched;

310. a master weave network management; 320. weaving a network management; 330. a primary innerliner layer; 340. supporting an inner lining layer;

400. and (5) developing identification.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

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 application, "a plurality" means two or more unless specifically limited otherwise.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that in the interventional medical device, the end close to the operator is referred to as "proximal end", the end far from the operator is referred to as "distal end", and the "proximal end" and the "distal end" of any one of the components of the double lumen microcatheter are defined according to this principle.

As described in the background art, the body of the conventional microcatheter is usually made of a polymer material, and is easily bent during use, thereby reducing the bending resistance of the microcatheter.

In order to solve the above problem, according to an aspect of the present application, an embodiment of the present application provides a tube body of a double-lumen microcatheter, as shown in fig. 1-3, the tube body 10 includes an outer jacket layer 100, an outer jacket reinforcing layer 200, and a double-lumen tube body 300, wherein the outer jacket layer 100 and the outer jacket reinforcing layer 200 are sequentially sleeved outside the double-lumen tube body 300 from outside to inside. The dual-chamber tube 300 comprises a main woven mesh tube 310 and a branch woven mesh tube 320 which are arranged side by side, and a main lining layer 330 and a branch lining layer 340 which are respectively arranged inside the main woven mesh tube 310 and the branch woven mesh tube 320. The main guide wire cavity 301 and the branch guide wire cavity 302 are respectively formed inside the main lining layer 330 and the branch lining layer 340, the main guide wire cavity 301 and the branch guide wire cavity 302 respectively form a main guide wire inlet 11 and a branch guide wire inlet 12 at the proximal end of the jacket layer 100, and the main guide wire cavity 301 and the branch guide wire cavity 302 respectively form a main guide wire outlet 13 and a branch guide wire outlet 14 at the distal end of the jacket layer 100.

The embodiment of the utility model provides an in, pipe shaft 10 sets up the owner respectively outside main inner liner 330 and a lining layer 340 and weaves net pipe 310 and weave net pipe 320, and set up overcoat enhancement layer 200 between overcoat layer 100 and two-chamber body 300, weave net pipe 310 through the owner and provide the support to leading silk chamber 301, weave net pipe 320 through a and provide the support to leading silk chamber 302, weave net pipe 310 through overcoat enhancement layer 200 and weave net pipe 320 through a to main, improved pipe shaft 10's bending resistance performance, make this two-chamber microcatheter difficult emergence in the use buckle.

It will be appreciated that the main woven mesh tube 310 and the sub-woven mesh tube 320 are arranged side by side, i.e. the axis of the main woven mesh tube 310 and the axis of the sub-woven mesh tube 320 are parallel to each other.

In some embodiments, the main liner layer 330 and the branch liner layer 340 are made of high-molecular materials with low friction coefficient, such as high-density polyethylene, polytetrafluoroethylene (PTFE), polyimide, and the like, which can improve the smoothness in the main guide wire cavity 301 and the branch guide wire cavity 302, and help to reduce the resistance of the guide wire passing through the main guide wire cavity 301 and the branch guide wire cavity 302.

In one embodiment, as shown in FIGS. 4-5, the outer reinforcement layer 200 is a braided or spiral wound structure.

The outer reinforcement layer 200 of the braided structure or the spiral wound structure not only helps to improve the buckling resistance of the tubular body 10, but also improves the flexibility of the tubular body 10 by the mutually staggered or orderly arranged threads. The weaving density or the spiral density can be adjusted according to the hardness requirement, and the flexibility change can be realized by combining different weaving densities of the main weaving mesh pipe 310 and the branch weaving mesh pipe 320, and the pipe body 10 can have stronger tensile strength and bending resistance.

Specifically, the braided structure can be made of stainless steel braided wires or nickel-titanium alloy braided wires or tungsten braided wires in a braiding mode, the shape of the metal wires can be cylindrical wires or flat wires, the thickness of the wires is 0.01-0.5mm, and the number of strands is 16-32. Of course, in other implementations, the braided structure can also be achieved by laser cutting the thin-walled tube, and the double-lumen tube 300 is wrapped and attached by a process of sheathing.

The spiral winding structure can be made by one or more stainless steel wires or nickel-titanium alloy wires or tungsten wires which are spirally wound according to a certain screw pitch. Of course, in other implementation manners, the spiral winding structure may also be implemented by laser cutting the thin-walled tube, and the double-lumen tube 300 is coated and attached by using an outer sleeve process.

In one embodiment, as shown in FIGS. 3-5, the distal ends of the main woven mesh tube 310 and the branch woven mesh tube 320 extend beyond the distal end of the outer reinforcing layer 200.

In the interventional operation process, the front end of the tube body 10 firstly enters the blood vessel of the human body, so better flexibility is required, and the outer sleeve reinforcing layer 200 can reduce the flexibility of the local tube body 10 to a certain extent, so that the outer sleeve reinforcing layer 200 does not wrap the far end of the main woven mesh tube 310 and the far end of the branch woven mesh tube 320 in order to avoid the situation that the tube body 10 is difficult to enter the blood vessel of the human body.

In one embodiment, as shown in FIGS. 4-5, the outer reinforcement layer 200 is a braided structure having a braid density that decreases progressively from the distal end to the proximal end, or the outer reinforcement layer 200 is a helically wound structure having a pitch that decreases progressively from the distal end to the proximal end. The main weaving net pipe and the branch weaving net pipe are weaving structures with weaving density gradually reduced from a far end to a near end.

Through the design, the hardness of the outer sleeve reinforcing layer 200, the hardness of the main woven mesh tube and the hardness of the branch woven mesh tube are gradually increased from the far end to the near end, so that the far end of the tube body 10 has good flexibility, the far end of the tube body 10 conveniently enters a pathological change position through a bent blood vessel, the position close to the near end of the tube body 10 has certain supporting force, deformation and distortion are not easy to occur in the pushing process, and the pushing performance of the tube body 10 is improved.

In some embodiments, as shown in fig. 1 and 3-5, to prevent damage to the vessel during pushing and withdrawing of the shaft 10, the passability of the catheter is further enhanced. The front end of the tube body 10 is also provided with a catheter head end, the catheter head end is designed into a streamline cone shape by adopting soft polyurethane or soft polyamide, and the catheter head end and the tube body 10 are tightly combined together through a welding process.

It can be understood that, in order not to obstruct the passage of the guide wires from the main guide wire outlet 13 and the branch guide wire outlet 14, the catheter head end is provided with an avoidance port corresponding to the main guide wire outlet 13 and the branch guide wire outlet 14.

In one embodiment, as shown in fig. 1 and 3-5, the hardness of outer jacket 100 may increase from the distal end to the proximal end.

Due to the design, the hardness of the outer sleeve layer 100 gradually becomes soft from the proximal end to the distal end, and the tube body 10 has certain flexibility while the bending prevention capability is improved.

Specifically, the outer jacket layer 100 may be made of various polyamide, polyurethane and polyolefin materials with different hardness, among the three polymer materials, polyamide has the lowest hardness, and polyolefin has the highest hardness, so that the hardness gradient effect of the outer jacket layer 100 is realized through the hardness properties of different materials.

Further, the outer jacket layer 100 can be heat welded to enclose the outer jacket reinforcing layer 200 and the dual-chamber tube body 300 inside, so that the tube body 10 is more compact, firm, loose-proof, and has better torsion resistance, torsion control and flexibility.

In one embodiment, as shown in fig. 4-5, the outer wall of the outer jacket layer 100 is provided with a main guide wire side inlet 101 communicating with the main guide wire cavity 301 and a branch guide wire side inlet 102 communicating with the branch guide wire cavity 302, and the main guide wire side inlet 101 and the branch guide wire side inlet 102 are spaced apart in the length direction of the tube body 10.

By arranging the main guide wire side inlet 101 and the branch guide wire side inlet 102 on the outer wall of the outer sleeve layer 100, the number of guide wire inlets is increased, and guide wires can selectively enter from different guide wire inlets according to different control modes in an operation. The main guide wire side inlet 101 and the branch guide wire side inlet 102 are arranged at intervals in the longitudinal direction of the tube body 10, so that the bending resistance of the tube body 10 at the same position is prevented from being reduced when the main guide wire side inlet 101 and the branch guide wire side inlet 102 are arranged at the same position.

It will be appreciated that in the event that guidewire exchange is not required for use, a guidewire may be accessed at the main guidewire side entry 101 and the branch guidewire side entry 102. Before operation, physiological saline can be injected into a washing lumen from a main guide wire inlet 11 and a branch guide wire inlet 12 at the proximal end of the tube body 10, and then a guide wire enters from a main guide wire side inlet 101 or a branch guide wire side inlet 102 for treatment.

Specifically, the main guide wire side inlet 101 and the branch guide wire side inlet 102 may be realized by a punch.

In one embodiment, as shown in fig. 3-5, the front end of the outer jacket layer 100 is provided with an arc-shaped guide portion 110, and the guide wires extending through the branch guide wire outlets 14 change direction after abutting against the arc-shaped guide portion 110 so as to be arranged at an angle to the main guide wire outlet 13.

By designing as above, the guide wire is angled as it passes through the arc-shaped guide part 110 at the branch guide wire outlet 14, and the guide wire can enter into the branched lesion vessel more easily.

Specifically, the arc guide 110 may be implemented by mold-hot welding.

In one embodiment, as shown in fig. 3-5, the double-lumen microcatheter further comprises a radiopaque visualization marker 400, and the visualization marker 400 is embedded at both the main guide wire outlet 13 and the branch guide wire outlet 14.

Through setting up development sign 400, can help the art person in the art to accurately grasp the position that the position and the seal wire export that the pipe shaft 10 distal end reachd, be favorable to going on smoothly of operation.

Specifically, the development mark 400 may be a platinum-iridium alloy or gold ring or wire wound winding structure, the development mark 400 at the main guide wire outlet 13 is nested between the distal end of the main woven mesh tube 310 and the outer jacket layer 100, and the development mark 400 at the branch guide wire outlet 14 is nested between the distal end of the branch woven mesh tube 320 and the outer jacket layer 100.

According to another aspect of the present application, embodiments of the present application also provide a double lumen microcatheter comprising a shaft 10 as described above.

Due to the use of the tube body 10, the double lumen microcatheter accordingly provides the advantages and benefits of the tube body 10, which are not further described herein.

In one embodiment, as shown in fig. 6-7, the double-lumen microcatheter further comprises a primary luer base 20, a branch luer base 30 and a destressing tube 40, wherein the primary luer base 20 is disposed at the proximal end of the body 10 and is communicated with the primary guidewire inlet 11, the branch luer base 30 is disposed at the proximal end of the body 10 and is communicated with the branch guidewire inlet 12, and the destressing tube 40 is sleeved outside the connection between the primary luer base 20 and the body 10 and the connection between the branch luer base 30 and the body 10.

By arranging the main luer seat 20 and the branch luer seat 30, an operator can conveniently take and operate the double-cavity micro catheter or access other instruments into the main guide wire inlet 11 or the branch guide wire inlet 12.

The stress removing tube 40 is arranged for relieving or diffusing stress generated when the tube body 10 bends, and avoiding the connection part of the tube body 10 and the main luer base 20 and the branch luer base 30 from being broken.

Specifically, the main luer base 20 and the branch luer base 30 may be made of rigid polycarbonate or polyurethane, and are connected to the proximal end of the tube body 10 by UV glue or quick-drying glue. The stress relief tube 40 is made of a soft elastomer material, such as a polyurethane elastomer, a polyolefin or a polyethylene elastomer.

In summary, the tube body of the double-lumen micro-catheter and the double-lumen micro-catheter provided by the embodiment have at least the following beneficial technical effects:

the pipe body of the double-cavity micro-catheter is provided with a main woven net pipe branch woven net pipe outside a main lining layer and a branch lining layer respectively, an outer sleeve reinforcing layer is arranged between the outer sleeve layer and the double-cavity pipe body, the main woven net pipe supports a main guide wire cavity, the branch woven net pipe supports a branch guide wire cavity, the main woven net pipe and the branch woven net pipe support through the outer sleeve reinforcing layer, the bending resistance of the pipe body is improved, and the double-cavity micro-catheter is not prone to bending in the using process.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples are merely illustrative of several embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the scope of the application. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The pipe body of the double-cavity micro-catheter is characterized by comprising an outer sleeve layer, an outer sleeve reinforcing layer and a double-cavity pipe body, wherein the outer sleeve layer and the outer sleeve reinforcing layer are sequentially sleeved outside the double-cavity pipe body from outside to inside;

the double-cavity pipe body comprises a main woven net pipe and a branch woven net pipe which are arranged side by side, and a main lining layer and a branch lining layer which are respectively arranged in the main woven net pipe and the branch woven net pipe;

the inside of main inner liner layer with the inside of propping up the inner liner layer forms main silk chamber and a branch's silk chamber respectively, main silk chamber with it is in to prop up the silk chamber the near-end on outer jacket layer forms main silk entry and a branch's silk entry respectively, main silk chamber with prop up the silk chamber and be in the distal end on outer jacket layer forms main silk export and a branch's silk export respectively.

2. The shaft of claim 1 wherein the outer reinforcing layer is a braided or spiral wound structure.

3. The shaft of claim 1 wherein the distal ends of both the main woven mesh tube and the branch woven mesh tube extend beyond the distal end of the outer reinforcing layer.

4. The tube body of claim 1,

the outer sleeve reinforcing layer is a braided structure with the braiding density gradually reduced from the far end to the near end, or the outer sleeve reinforcing layer is a spiral winding structure with the thread pitch gradually reduced from the far end to the near end;

the main weaving net pipe and the branch weaving net pipe are weaving structures of which the weaving density is gradually reduced from a far end to a near end.

5. The shaft of claim 1, wherein the hardness of the outer jacket layer increases from the distal end to the proximal end.

6. The tube body of claim 1, wherein the outer wall of the outer jacket layer is provided with a main guide wire side inlet communicated with the main guide wire cavity and a branch guide wire side inlet communicated with the branch guide wire cavity, and the main guide wire side inlet and the branch guide wire side inlet are arranged at an interval in the length direction of the tube body.

7. The tube body according to claim 1, wherein the front end of the outer sheath layer is provided with an arc-shaped guide portion, and the guide wire extending through the branch guide wire outlet is changed in direction after abutting against the arc-shaped guide portion so as to form an included angle with the main guide wire outlet.

8. The catheter body of claim 1, wherein the double-lumen microcatheter further comprises an X-ray opaque visualization marker, and the visualization marker is embedded at the outlet of the main guide wire and the outlet of the branch guide wire.

9. A double lumen microcatheter comprising the tube body of any of claims 1-8.

10. The double-lumen microcatheter of claim 9, further comprising a primary luer hub disposed at the proximal end of the shaft and communicating with the primary guidewire inlet, a branch luer hub disposed at the proximal end of the shaft and communicating with the branch guidewire inlet, and a stress relief tube sleeved outside the junction of the primary luer hub and the shaft and the junction of the branch luer hub and the shaft.

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