CN217697615U

CN217697615U - Coaxial block opening mechanism

Info

Publication number: CN217697615U
Application number: CN202121959668.0U
Authority: CN
Inventors: 王格; 刘斌
Original assignee: Shanghai Li Kai Technology Co ltd
Current assignee: Shanghai Li Kai Technology Co ltd
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2022-11-01
Anticipated expiration: 2031-08-19

Abstract

The application relates to a coaxial occlusion opening mechanism, which comprises a balloon catheter, a micro guide wire and a conveying guide pipe component; the balloon catheter is provided with an inner cavity; the micro-catheter is arranged in the inner cavity of the balloon catheter in a penetrating way, and the outer wall of the micro-catheter is attached to the inner cavity of the balloon catheter; the micro guide wire is arranged in the micro catheter in a penetrating way and attached to the inner wall of the micro catheter; the conveying guide pipe assembly is sleeved outside the balloon catheter and is used for conveying the balloon catheter to a far-end position; the balloon catheter, the microcatheter, the micro guide wire and the delivery guide pipe component are coaxially arranged. Through wearing to establish the inner chamber at sacculus pipe with little pipe, the little seal wire of deuterogamying constitutes coaxial system jointly, very big promotion sacculus pipe is at the stability of transportation process, on the inner chamber wall of the attached sacculus pipe of little pipe, play good supporting role, effectually avoided little seal wire directly to wear to establish in the sacculus pipe, rock at the in-process that targets in place and be difficult to accurate scheduling problem that targets in place, promote the ability that targets in place of sacculus pipe, so that use sacculus pipe to treat more diseases.

Description

Coaxial block opening mechanism

Technical Field

The application relates to the technical field of medical equipment, in particular to a coaxial block opening mechanism.

Background

According to the largest-scale clinical research (CICAS) on intracranial atherosclerotic stenosis in China, 46.6% of Chinese AIS patients have intracranial atherosclerotic stenosis, and the risk of stroke recurrence is obviously improved due to the combined stenosis. At present, the most main treatment mode of intracranial atherosclerotic stenosis is to perform expansion by using a balloon, and whether to continue the stent implantation is determined according to the effect after the expansion. There are two types of balloons that are mainly used at present, a rapid exchange balloon and an OTW balloon. The two types of saccules have advantages, the quick exchange of the saccule catheters can be realized by the quick exchange saccule, the guide wire does not need to be prolonged, and the operation of a doctor is convenient. The OTW balloon has a smaller lumen and a smaller volume.

The existing balloon catheter system has the problem of difficult in-place delivery by using the traditional 0.014 micro guide wire because the balloon catheter has higher rigidity and larger inner diameter.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present application provides a coaxial occlusion opening mechanism, which includes a balloon catheter, a micro-guide wire, and a delivery guide tube assembly; the balloon catheter is provided with an inner cavity; the micro catheter is arranged in the inner cavity of the balloon catheter in a penetrating mode, the outer wall of the micro catheter is attached to the inner cavity of the balloon catheter, and the balloon catheter and the micro catheter can move relatively; the micro guide wire penetrates through the micro catheter and is attached to the inner wall of the micro catheter, and the micro guide wire and the micro catheter can move relatively; the conveying guide pipe assembly is sleeved outside the balloon catheter and used for conveying the balloon catheter to a far-end position, and the conveying guide pipe assembly and the balloon catheter can move relatively; the balloon catheter, the micro-guide wire and the conveying guide pipe assembly are coaxially arranged.

In one possible implementation, the delivery guide tube assembly includes an intermediate catheter; the middle catheter is sleeved outside the balloon catheter, the inner wall of the middle catheter is attached to the balloon catheter, the middle catheter and the balloon catheter can move relatively, and the middle catheter and the balloon catheter are coaxially arranged.

In one possible implementation, the delivery guide tube assembly includes a guide catheter; the guiding catheter is sleeved outside the middle catheter, the guiding catheter and the middle catheter can move relatively, and the guiding catheter and the balloon catheter are coaxially arranged.

In one embodiment, the distal end of the microcatheter extends out of the balloon catheter.

In one particular embodiment, the balloon of the balloon catheter is disposed at a location proximal to the distal end thereof.

In one embodiment, the distal end of the intermediate catheter extends out of the guiding catheter; the distal end of the balloon catheter extends out of the intermediate catheter.

In one embodiment, the balloon catheter lumens have the same width and are within 0.010 inches to 0.055 inches wide.

In one embodiment, the microcatheter has an outer diameter in the range of 0.010 inches to 0.055 inches.

The beneficial effect of this application: through wearing to establish the inner chamber at sacculus pipe with little pipe, the little seal wire of deuterogamy constitutes coaxial system jointly, very big promotion sacculus pipe is at the stability of transportation process, on the inner chamber wall of the attached sacculus pipe of little pipe, play good supporting role, effectually avoided little seal wire directly to wear to establish in the sacculus pipe, rock the in-process that targets in place and be difficult to accurate scheduling problem that targets in place, promote the ability of targeting in the sacculus pipe, so that use the more diseases of sacculus pipe treatment. The conveying guide tube assembly outside the balloon catheter is matched again, and high-efficient and quick conveying is completed, so that the operation time is effectively shortened, the operation risk is reduced, the operation effect is improved, the operation of medical personnel is facilitated, and the applicability of the coaxial occlusion opening mechanism is improved.

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 cross-sectional view of a balloon of a coaxial occlusion break mechanism after expansion in accordance with an embodiment of the present application;

fig. 2 illustrates a cross-sectional view of a balloon recoil of a coaxial occlusion break-away mechanism according to 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 the present application or for simplicity of 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 therefore should not be considered limiting of 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.

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 cross-sectional view of a balloon of a coaxial occlusion break mechanism after expansion, according to an embodiment of the present application; fig. 2 illustrates a cross-sectional view of a balloon recoil of a coaxial occlusion break-away mechanism according to an embodiment of the present application.

As shown in fig. 1 to 2, the coaxial occlusion passing mechanism includes: the balloon catheter 3 is provided with an inner cavity, the micro catheter 4 is arranged in the inner cavity of the balloon catheter 3 in a penetrating mode, and the balloon catheter 3 and the micro catheter 4 can generate relative displacement; the outer wall of the micro-catheter 4 is attached to the inner cavity of the balloon catheter 3, the micro-guide wire 5 penetrates through the micro-catheter 4 and is attached to the inner wall of the micro-catheter 4, and the micro-guide wire 5 can be displaced relative to the micro-catheter 4; the conveying guide tube component is sleeved outside the balloon catheter 3 and used for conveying the balloon catheter 3 to a far-end position, the conveying guide tube component can generate relative displacement with the balloon catheter 3, and the balloon catheter 3, the micro-catheter 4, the micro-guide wire 5 and the conveying guide tube component are coaxially arranged.

In this embodiment, through wearing to establish little pipe 4 in the inner chamber of sacculus pipe 3, cooperate little seal wire 5 again and form coaxial system jointly, very big promotion sacculus pipe 3 is at the stability of transportation process, on little pipe 4 attaches the inner chamber wall of sacculus pipe 3, play good supporting role, effectually avoided little seal wire 5 directly to wear to establish in sacculus pipe 3, rock the scheduling problem that is difficult to accurately target in place at the in-process that targets in place, promote sacculus pipe 3's the ability of targeting in place, so that use sacculus pipe 3 to treat more diseases. Cooperate the outer delivery guide tube subassembly of sacculus pipe 3 again, high-efficient, quick completion is carried to effectual shortening operation time reduces the operation risk, promotes the operation effect, more does benefit to the medical personnel operation, improves the coaxial obliteration of this application and opens the suitability of mechanism.

It is also specifically emphasized that the proximal end is the end near the medical practitioner in the field, and the opposite end is the distal end.

Furthermore, the coaxial occlusion opening mechanism is preferably suitable for treatment of intracranial atherosclerosis stenosis, after the micro guide wire 5 is in place, the multilayer tube is coaxially conveyed forwards until the balloon catheter 3 reaches a lesion part to perform balloon dilatation, and after the balloon dilatation is finished, the stent can be released in situ through the micro catheter 4 without further exchange operation, so that the working process of treating personnel is simplified, and the risk is reduced.

As shown in fig. 1, in one embodiment, the delivery guide tube assembly further includes an intermediate catheter 2, the intermediate catheter 2 is sleeved outside the balloon catheter 3, the inner wall of the intermediate catheter 2 is attached to the balloon catheter 3, the intermediate catheter 2 and the balloon catheter 3 can be displaced relatively, and the intermediate catheter 2 and the balloon catheter 3 are coaxially disposed.

In this embodiment, the function of the delivery guide tube assembly is to mainly deliver the balloon catheter 3 and the micro-catheter 4 from the proximal end to the distal end, so that the balloon catheter 3 and the micro-catheter 4 can be pushed to the lesion site from the distal end in a narrower blood vessel.

As shown in fig. 2, in one embodiment, the delivery guide tube assembly further includes a guide catheter 1, the guide catheter 1 is sleeved outside the intermediate catheter 2, the guide catheter 1 and the intermediate catheter 2 can be displaced relatively, and the guide catheter 1 and the balloon catheter 3 are coaxially disposed.

In this embodiment, the middle catheter 2 is further sleeved with a guiding catheter 1, and the guiding catheter 1 can convey the middle catheter 2, the balloon catheter 3 and the micro-catheter 4 from the proximal end to the distal end, so that the middle catheter 2, the balloon catheter 3 and the micro-catheter 4 can be pushed to the distal end continuously along the direction of the micro-guide wire 5.

More specifically, the guiding catheter 1, the middle catheter 2, the balloon catheter 3, the micro-catheter 4 and the micro-guide wire 5 which are sleeved layer by layer from outside to inside are coaxially arranged, and form the coaxial occlusion opening mechanism of the present application, so that the in-place capability of the balloon catheter 3 is improved, and the balloon catheter 3 can be used for treating more diseases.

In one embodiment, the distal end of the intermediate catheter 2 extends out of the guide catheter 1, and the distal end of the balloon catheter 3 extends out of the intermediate catheter 2.

So far, the specific working process of the coaxial occlusion and opening mechanism of the present application, as an example of the intracranial atherosclerosis stenosis therapy, is to insert the coaxial occlusion and opening mechanism from the inner femoral artery of a human body, insert a distal blood vessel as a guide wire, insert the guide catheter 1, the middle catheter 2, the balloon catheter 3 and the micro-catheter 4 coaxially in the direction of the micro-guide wire 5 to extend distally, when entering a narrower blood vessel, the outermost guide catheter 1 stops pushing forward, the middle catheter 2 and the rest of the catheters therein continue to extend forward together, then until reaching the intracranial artery, the middle catheter 2 stops pushing forward, the balloon catheter 3 and the micro-catheter 4 continue to extend forward, and after the balloon catheter 3 reaches a diseased location, the balloon of the balloon catheter 3 stops expanding, and medical personnel in the field can specifically make a subsequent treatment scheme according to actual situations.

In one embodiment, the distal end of the microcatheter 4 extends out of the balloon catheter 3.

In this embodiment, the distal end of the micro-catheter 4 ensures that the inner cavity of the balloon catheter 3 is always used as a delivery channel for the micro-catheter 4 and the micro-guide wire 5, and ensures that the coaxial occlusion opening mechanism of the present application has high stability and accurate positioning.

In one of the specific embodiments, the balloon of the balloon catheter 3 is disposed at a position near the distal end thereof.

In one embodiment, the width of the lumen of the balloon catheter 3 is the same and the inner diameter of the lumen is within 0.010 inches to 0.055 inches.

In one embodiment, the microcatheter 4 has an outer diameter in the range of 0.010 inches to 0.055 inches.

In the above embodiment, it is preferable that the guide catheter 1 used in the system is an 8F or 6F conventional guide catheter 1; the distal access catheter is a 6F (0.070 inch) or 5F (0.058 inch) conventional distal access catheter; the microcatheter 4 is a conventional microcatheter 4 of 0.027 inch, 0.021 inch or 0.017 inch and the micro-wire 5 is a conventional micro-wire 5 of 0.018 inch, 0.014 inch or 0.010 inch. The inner diameter of the balloon catheter 3 is in the range of 0.33mm to 1.33mm, and it is ensured that the lumen thereof can pass through the conventional microcatheter 4 of 0.027 inch, 0.021 inch or 0.017 inch, and the outer diameter thereof before expansion can be adapted to the 6F or 5F intermediate catheter 2 by itself.

The foregoing description of the embodiments of the present application has been presented for purposes of illustration and description and is not intended to be exhaustive or limited to the embodiments disclosed. 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 was chosen in order to best explain the principles of the embodiments, the practical application, or improvements 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 coaxial occlusion opening mechanism is characterized by comprising a balloon catheter, a micro guide wire and a conveying guide pipe assembly;

the balloon catheter is provided with an inner cavity;

the micro-catheter is arranged in the inner cavity of the balloon catheter in a penetrating mode, the outer wall of the micro-catheter is attached to the inner cavity of the balloon catheter, and the balloon catheter and the micro-catheter can move relatively;

the micro guide wire penetrates through the micro catheter and is attached to the inner wall of the micro catheter, and the micro guide wire and the micro catheter can move relatively;

the conveying guide pipe assembly is sleeved outside the balloon catheter and used for conveying the balloon catheter to a far-end position, and the conveying guide pipe assembly and the balloon catheter can move relatively;

the balloon catheter, the micro-guide wire and the conveying guide pipe assembly are coaxially arranged.

2. The coaxial occlusion break-up mechanism of claim 1, wherein the delivery guide tube assembly comprises an intermediate catheter;

the middle catheter is sleeved outside the balloon catheter, the inner wall of the middle catheter is attached to the balloon catheter, the middle catheter and the balloon catheter can move relatively, and the middle catheter and the balloon catheter are coaxially arranged.

3. The coaxial occlusion break-up mechanism of claim 2, wherein the delivery guide tube assembly comprises a guide catheter;

the guiding catheter is sleeved outside the middle catheter, the guiding catheter and the middle catheter can move relatively, and the guiding catheter and the balloon catheter are coaxially arranged.

4. The coaxial occlusion break mechanism of claim 1, wherein a distal end of the microcatheter extends out of the balloon catheter.

5. The coaxial occlusion break mechanism of any of claims 1-4, wherein the balloon of the balloon catheter is disposed at a location proximal to the distal end thereof.

6. The coaxial occlusion passing mechanism of claim 3, wherein a distal end of the intermediate catheter extends out of the guide catheter;

the distal end of the balloon catheter extends out of the intermediate catheter.

7. The coaxial occlusion break mechanism of any of claims 1-4, 6, wherein the balloon catheter lumens have the same diameter and are within the range of 0.010 inches to 0.055 inches.

8. The coaxial occlusion break mechanism of any of claims 1-4, 6, wherein the outer diameter of the microcatheter is within the interval of 0.010 inches to 0.055 inches.