CN212700026U

CN212700026U - Extension finger guide tube with anchoring function

Info

Publication number: CN212700026U
Application number: CN202020181634.2U
Authority: CN
Inventors: 李世强
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-02-18
Filing date: 2020-02-18
Publication date: 2021-03-16
Anticipated expiration: 2030-02-18

Abstract

The application discloses extension finger guide pipe with anchoring function includes: the catheter is axially communicated, the length of the catheter is 10 mm-30 mm, and a channel for blood supply and/or medical instruments to pass through is arranged inside the catheter; a hypotube connected to the catheter; a balloon wound around the periphery of the catheter; the injection tube is communicated with the balloon to provide a medium channel, and the injection tube and the hypotube extend towards the near end in a side-by-side arrangement or an inner-outer nesting or combination mode.

Description

Extension finger guide tube with anchoring function

Technical Field

The application relates to the field of medical instruments, in particular to an extension finger guide tube with an anchoring function.

Background

With the progress of science and technology, medical science also develops more and more, will all adopt intervention therapy to some cardiovascular disease's treatment mostly, and the equipment that uses is most including the extension guide pipe, guides the pipe to penetrate the blood vessel through the guide extension, then pushes away medical instrument (seal wire etc.) from the extension guide pipe, realizes treatment.

However, the axial supporting force of the existing extension guide catheter in the blood vessel is weak, and when the medical instrument is pushed through the extension guide catheter, the problem that the extension guide catheter is driven to reversely move in the blood vessel occurs, so that the problems that the supporting force of the extension guide catheter is weak, the grasping difficulty of an operator is high, and complications are high are caused.

SUMMERY OF THE UTILITY MODEL

The application provides an extension guide catheter with anchoring function for when medical instrument pushes away through extension guide catheter among the solution prior art, can drive extension guide catheter reverse motion's in the blood vessel technical problem.

The application provides an extension guide pipe with anchoring function includes:

the catheter is axially communicated, the length of the catheter is 10 mm-300 mm, and a channel for blood supply and/or medical instruments to pass through is arranged inside the catheter;

a hypotube connected to the catheter;

a balloon wound around the periphery of the catheter;

and the injection tube is communicated with the balloon to provide a medium channel, and the injection tube and the hypotube extend towards the proximal end of the balloon together in a side-by-side arrangement or an inner-outer nesting or combination manner.

Several alternatives are provided below, but not as an additional limitation to the above general solution, but merely as a further addition or preference, each alternative being combinable individually for the above general solution or among several alternatives without technical or logical contradictions.

Optionally, the end face of the catheter facing the hypotube is arranged obliquely relative to the axial direction of the catheter.

Optionally, the pipe diameter of the conduit is 3F-6F.

Optionally, the conduit is of an inner-outer multi-layer structure, and at least one layer is a metal reinforcing layer; the metal reinforcing layer is woven or wound by metal wires.

Optionally, the hypotube is butted against a proximal side of the catheter, or the hypotube further extends towards a distal end of the catheter within a sandwich of the catheter.

Optionally, the axis of the hypotube is parallel to the axis of the catheter.

Optionally, the length specification of the balloon is 10 mm-30 mm along the axial direction of the catheter;

the diameter specification of the saccule under the expansion state of the medium channel is 2.5 mm-5.0 mm.

Optionally, the number of the balloons is one, and the balloons surround the periphery of the catheter at least for one circle;

or the number of the balloons is multiple, each balloon surrounds the periphery of the catheter for a circle, the distribution mode is circumferential distribution or non-uniform distribution, and the shapes of the balloons are the same or different.

Optionally, the injection tube is in communication with a proximal side of the balloon.

Optionally, the injection tube is attached and fixed to the outer side wall of the catheter.

Optionally, the injection tube and the hypotube are nested inside and outside, specifically one of the following modes:

the injection tube is positioned inside the hypotube;

the injection tube is arranged outside the hypotube, and a sandwich layer of the injection tube and the hypotube is used as the medium channel.

Optionally, the injection tube and the hypotube are combined, and the interior of the hypotube is used as the medium channel.

Optionally, a control valve is installed at one end of the injection tube far away from the balloon.

The application provides an extension guide pipe with anchoring function has following technological effect:

the saccule anchors the catheter at the preset position in the blood vessel, and when the medical instrument is pushed into the channel of the catheter, the axial reaction force applied to the catheter by the medical instrument is resisted, and the catheter is driven to move reversely in the blood vessel, so that the supporting force of the extension guide catheter is enhanced, the grasping difficulty of an operator is reduced, and the problem of complications is solved.

Drawings

FIG. 1 is a schematic structural view of an elongate guiding catheter according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of an elongate guiding catheter according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of the structure of the catheter and balloon;

FIG. 4 is a schematic view of the structure of the catheter and balloon;

FIG. 5 is a schematic view of the structure of the hypotube and the injection tube;

FIG. 6 is a schematic view of the structure of the hypotube and the injection tube;

FIG. 7 is a schematic structural view of a hypotube and a syringe.

The reference numerals in the figures are illustrated as follows:

100. extending the guide catheter; 101. a medical device; 10. a conduit; 11. a channel; 12. an end face; 13. a metal reinforcing layer; 20. a hypotube; 21. a through hole; 30. a balloon; 31. a deformation section; 40. an injection tube; 41. a media channel; 50. and (4) controlling the valve.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present.

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 application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In one embodiment, as shown in fig. 1 to 7, the present application provides an extension guiding catheter 100 with anchoring function, which includes a catheter 10 passing through axially, a hypotube 20 connected to the catheter 10, a balloon 30 surrounding the catheter 10, and an injection tube 40 communicating with the balloon 30 to provide a medium channel 41. Inside the catheter 10 is a channel 11 through which blood and/or medical instruments 101 pass.

The hypotube 20 can drive the catheter 10 to move in the blood vessel, after the catheter 10 reaches a predetermined position of the blood vessel, a medium enters the balloon 30 from the medium channel 41 of the injection tube 40, the balloon 30 expands under the action of the medium, the outer wall of the balloon 30 abuts against the inner wall of the blood vessel to anchor the catheter 10 in the blood vessel, and when the medical apparatus 101 (such as a guide wire) is pushed into the channel 11 of the catheter 10, the axial reaction force applied to the catheter 10 by the medical apparatus 101 is resisted, so that the problem that the catheter 10 moves in the blood vessel is driven, the supporting force of the extension guide catheter 100 is enhanced, the grasping difficulty of an operator is reduced, and the problem of complications is reduced.

The elongate guiding catheter 100, when anchored at a predetermined location in a blood vessel, provides the necessary sealed operative plane for other forward operative techniques such as medical devices 101 to reliably prevent the formation of a subintimal hematoma.

When the side wall of the blood vessel (coronary artery) is broken, the saccule 30 can block the broken part of the side wall of the blood vessel to stop bleeding on the side wall of the blood vessel, meanwhile, the channel 11 of the catheter 10 can keep blood flowing in the blood vessel continuously to maintain blood supply of the heart, and provide accurate hemostasis and stable myocardial perfusion guarantee and preparation time for subsequent operations.

Wherein, adopt integrative structure or detachable to be connected between sacculus 30 and the pipe 10, the leakproofness of integrative structure is better, and the security is high. The detachably connected structure facilitates assembly of the balloon 30 and the catheter 10 at a lower cost. When the balloon 30 and the catheter 10 are detachably connected, the balloon 30 and the catheter 10 are fixed by gluing.

Balloon 30 is of a hollow construction. Balloon 30 may be made of an elastic or deformable material (e.g., rubber). When balloon 30 is filled with a medium, which may be a fluid, a hydrogel or other water-swellable material, such as saline, balloon 30 will expand.

In another embodiment, the length of the catheter 10 is between 10mm and 300 mm.

Too short a length of the catheter 10 increases the difficulty of the process of mounting the balloon 30 to the catheter 10. An excessive length of the catheter 10 can result in material waste.

The length of the catheter 10 is selected according to the actual use of the extension guide catheter 100:

when the extension guiding catheter 100 needs to be anchored at a predetermined position of a blood vessel, the length of the catheter 10 is 200mm to 300 mm; similarly, when the extended guide catheter 100 is required to seal a damaged vascular wall, the length of the catheter 10 is 10mm to 30 mm.

Wherein 1F is 0.33 mm.

Preferably, the length of the catheter 10 is 20mm or 300 mm.

In another embodiment, as shown in FIG. 1, the end face 12 of the catheter 10 facing the hypotube 20 is disposed obliquely with respect to the axial direction of the catheter 10.

The catheter 10 has the end surface 12 on one side, which is the proximal side, and on the opposite side, which is the distal side. The end surface 12 serves to increase the inlet area of the channel 11 of the catheter 10 to facilitate passage of the medical device 101 through the channel 11.

The angle between the end face 12 of the catheter 10 facing the hypotube 20 and the axial direction of the catheter 10 is 10 to 60 degrees. The angle between the end surface 12 of the catheter 10 facing the hypotube 20 and the length direction of the catheter 10 is too small, the area of the inlet of the channel 11 of the catheter 10 is increased a little, and the effect of facilitating the medical instrument 101 to pass through the channel 11 is not achieved. An excessively large angle between the end face 12 of the catheter 10 facing the hypotube 20 with respect to the axial direction of the catheter 10 may result in an increased length of the catheter 10.

Preferably, the angle between the end face 12 of the catheter 10 facing the hypotube 20 and the axial direction of the catheter 10 is 45 degrees.

In another embodiment, as shown in FIG. 1, the conduit 10 has a tube diameter of 3F to 6F. The tube diameter of the catheter 10 is too large, which causes a problem that the catheter 10 is tightly adhered to the inner wall of the blood vessel, causing complications. An excessively small tube diameter of the catheter 10 may result in blood not being able to circulate in the channel 11 of the catheter 10 in a timely manner, or the medical device 101 being unable to pass through the channel 11 of the catheter 10.

Preferably, the pipe 10 has a pipe diameter of 4F.

In another embodiment, as shown in FIG. 2, the catheter 10 is a multi-layer structure with an inner and an outer layer, and at least one layer is a metal reinforcement layer 13. The metal reinforcement layer 13 can reinforce the rigidity of the catheter 10.

When the balloon 30 is inflated by the medium, a part of the force of the balloon 30 acts on the side wall of the catheter 10, and in order to limit the radial deformation range of the balloon 30, effectively store energy and prevent the catheter 10 from collapsing, the catheter 10 is of a rigid cylindrical structure, and the material of the non-elastic body is adopted, so that the elastic deformation is reduced as much as possible.

The tubular structure is not limited to a cross-sectional shape, and may be, for example, circular or elliptical, and the cross-sectional area of each portion of the catheter 10 may be appropriately changed along the length of the catheter 10 to match the change in shape of the balloon 30.

The metal reinforcing layer 13 is woven by steel wires or wound.

In another embodiment, as shown in fig. 1, hypotube 20 is docked to the proximal side of catheter 10. The hypotube 20 is secured to the proximal side of the catheter 10 by welding or adhesive bonding.

Alternatively, in other embodiments, hypotube 20 extends further distally of catheter 10 within the confines of catheter 10. When the catheter 10 is of a multi-layered construction, the hypotube 20 may extend through one of the interlayers toward the distal end of the catheter 10.

Preferably, the axis of hypotube 20 is disposed parallel to the axis of catheter 10.

In another embodiment, as shown in FIG. 1, the length of the balloon 30 may be 10mm to 30mm in the axial direction of the catheter 10.

When the length of the balloon 30 is too short, and the damaged part of the side wall of the blood vessel is too large, the balloon 30 cannot block the damaged part of the side wall of the blood vessel; or the balloon 30 has a sharp angle at the side close to the inner wall of the blood vessel in the expanded state, and the balloon 30 can puncture the blood vessel wall when anchoring the catheter 10 in the blood vessel. An excessively long length of the balloon 30 may result in a waste of material and a complicated manufacturing process for the extension guide catheter 100.

Further, the diameter of the balloon 30 in the expanded state of the medium passage 41 is 2.5mm to 5.0 mm.

When the diameter of the balloon 30 in the expanded state of the medium passage 41 is too small, the inner diameter of the blood vessel becomes too large, and the balloon 30 cannot exert the effect of anchoring the catheter 10. When the diameter of the balloon 30 in the expanded state of the medium passage 41 is too large, the balloon 30 may rupture the blood vessel wall under the condition that the pressure of the balloon 30 is not well controlled.

In another embodiment, as shown in fig. 3, the number of balloons 30 is one and at least one circumference around the periphery of the catheter 10. This simplifies the structure of the extension guide catheter 100 and facilitates the manufacturing process.

Alternatively, to improve the compatibility of the extension guiding catheter 100 with blood vessels of different inner diameters, in one embodiment, as shown in fig. 4, the number of balloons 30 is multiple, each balloon 30 is circumferentially distributed or non-uniformly distributed around the periphery of the catheter 10, and the shape of each balloon 30 is the same or different.

Given the tooling costs of the elongate guide catheter 100, in one embodiment, the number of balloons is 2, 3, or 4. Specifically, in the longitudinal direction of the catheter 10, the balloon is provided with the deformation part 31 at least in the middle part thereof, and the deformation parts 31 of the balloons are positioned to commonly act on the inner wall of the blood vessel.

In another embodiment, as shown in fig. 1, injection tube 40 is in communication with the proximal side of balloon 30.

The proximal side of balloon 30 is open and communicates with syringe tube 40.

In another embodiment, as shown in FIG. 1, the syringe 40 engages and secures to the outer sidewall of the catheter 10. The injection tube 40 is fixed to the outer side wall of the catheter 10 by means of gluing, whereby the pair of injection tubes 40 are fixed to the catheter 10.

In another embodiment, as shown in fig. 1 and 5, both the injection tube 40 and the hypotube 20 extend in a side-by-side arrangement together towards the proximal end of the balloon 30.

The axis of the syringe 40 is parallel to the axis of the hypotube 20, and the syringe 40 is fixed to the outer sidewall of the hypotube 20 by gluing.

In another embodiment, as shown in fig. 6 and 7, the syringe tube 40 extends proximally of the balloon 30 with both the hypotube 20 nested inside and outside.

As shown in fig. 6, the syringe 40 is nested inside and outside the hypotube 20, specifically, the syringe 40 is inside the hypotube 20.

The hypotube 20 is provided with a through hole 21 which is axially communicated, and the injection tube 40 extends and penetrates through the through hole 21 of the hypotube 20 after being connected with the balloon 30; this simplifies the structure of the extension guide catheter 100 and facilitates the processing of the extension guide catheter 100. When the injection tube 40 is disposed in the through hole 21 of the hypotube 20, it may be fixed on the inner wall of the through hole 21 by gluing, so as to increase the stability of the extension guiding catheter 100 during use.

Of course, in other embodiments, as shown in fig. 7, the injection tube 40 and the hypotube 20 are nested inside and outside, specifically, the injection tube 40 is located outside the hypotube 20, and the interlayer of the two is used as the medium channel 41.

In another embodiment, the syringe tube 40 and hypotube 20 both merge and extend proximally. The injection tube 40 and the hypotube 20 are integrated, and the inside of the hypotube 20 serves as a medium passage 41.

In this manner, syringe 40 may be omitted. The through hole 21 inside the hypotube 20 can be communicated with the balloon 30, the through hole 21 serves as a medium channel 41, and a medium can be conveyed to the balloon 30 through the through hole 21, so that the structure of the extension guide catheter 100 can be further simplified, and the extension guide catheter 100 can be conveniently processed.

In another embodiment, as shown in FIG. 1, the end of syringe tube 40 distal to balloon 30 is fitted with a control valve 50. The control valve 50 may be a complete valve body structure or a corresponding fitting structure, for example, a luer fitting or the like.

An appropriate amount of filler is first injected into balloon 30 according to the inner diameter of the vessel, and then control valve 50 on injection tube 40 is closed to retain the filler within balloon 30, thereby achieving a relatively stable contact pressure. The pressure of balloon 30 may also be adjusted instantaneously by controlling valve 50.

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. When technical features in different embodiments are represented in the same drawing, it can be seen that the drawing also discloses a combination of the embodiments concerned.

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application.

Claims

1. An extended guide tube having an anchoring function, comprising:

a hypotube connected to the catheter;

a balloon wound around the periphery of the catheter;

2. The extension guide tube with an anchoring function according to claim 1, wherein an end face of the catheter toward the hypotube is disposed obliquely with respect to an axial direction of the catheter.

3. The extension guide tube with an anchoring function according to claim 1 or 2, wherein the tube diameter of the tube is 3F to 6F.

4. The extension guide tube with an anchoring function according to claim 1, wherein the tube has an inner and outer multi-layer structure, and at least one layer is a metal reinforcing layer; the metal reinforcing layer is woven or wound by metal wires.

5. The extension guide tube with anchoring function according to claim 1, wherein the hypotube is butted up to a proximal side of the catheter, or the hypotube further extends to a distal end of the catheter within a sandwich of the catheter.

6. The extended guide catheter with an anchoring function according to claim 1, wherein the axis of the hypotube is arranged in parallel with the axis of the catheter.

7. The extension guide catheter with an anchoring function according to claim 1, wherein the length of the balloon is 10mm to 30mm in the axial direction of the catheter;

8. The extension guide tube with anchoring function of claim 1 or 7, wherein the number of the balloons is one, and at least one circle is around the periphery of the tube;

9. The extended guide catheter with anchoring function according to claim 1, wherein the injection tube communicates with a proximal side of the balloon.

10. The extended guide catheter with an anchoring function according to claim 1 or 9, wherein the syringe is engaged and fixed with an outer side wall of the catheter.

11. The extension guiding tube with anchoring function as claimed in claim 1, wherein the injection tube and the hypotube are nested inside and outside, specifically one of the following ways:

the injection tube is positioned inside the hypotube;

12. The extended guide tube with an anchoring function according to claim 1, wherein the injection tube and the hypotube are integrated, and the inside of the hypotube serves as the medium passage.

13. The extended guide tube with anchoring function of claim 1, wherein a control valve is installed at one end of the injection tube away from the balloon.