CN111096776A

CN111096776A - Bendable covered stent opening pricking needle device

Info

Publication number: CN111096776A
Application number: CN201911376540.9A
Authority: CN
Inventors: 许培林; 吴光亚; 黄炫民; 吴强; 黄伟
Original assignee: Suzhou Tepxin Intelligent Technology Co ltd
Current assignee: Suzhou Tepxin Intelligent Technology Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-05-05

Abstract

The invention relates to a bendable covered stent opening puncture needle device, which comprises an outer sheath, a puncture needle and a control guide wire; the felting needle and the control guide wire are arranged inside the sheath along the axial direction of the sheath; the number of the control guide wires is at least two, the front ends of the control guide wires are respectively arranged on the inner wall of the front part of the outer sheath, and the positions of the control guide wires are not completely the same; the front end part of the sheath is provided with an opening; the puncture needle can move back and forth along the axial direction of the sheath, and the front end of the puncture needle can extend out of the opening at the front end part of the sheath under the driving; the control wire can move outside the outer sheath under the driving action. Compared with the conventional arrangement, the device is provided with two groups of control guide wires, and the front ends of the two groups of control guide wires, which are connected with the outer sheath, are arranged in front and back, so that the back part of the outer sheath can be bent, and the wall sticking points at the back part of the outer sheath during operation are reduced; the wall sticking points are reduced, the whole device has room for rotation, and the device can rotate left and right in the operation, so that the area which can be punctured by the puncture needle is enlarged, the opening of the passage is increased, and the flexibility of the operation is improved.

Description

Bendable covered stent opening pricking needle device

Technical Field

The invention relates to the field of medical instruments, in particular to a bendable covered stent opening pricking pin device.

Background

In modern surgery, a tectorial stent is often required to be placed in a main blood vessel; but this may occlude part of the branch vessels communicating with the main vessel; it is therefore necessary to puncture some portion of the stent graft with a lancet to open it; in order not to puncture a blood vessel, the lancet is usually housed in an outer sheath to constitute a lancet device into the body; because the body vessel is curved, the lancet device is generally flexible and its curvature can be adjusted by a pull wire to effect movement in the curved body vessel; however, the conventional puncture needle device can reach the puncture position at the front part, and the rear part of the conventional puncture needle device is often attached to the wall of a blood vessel due to the flexibility of the blood vessel, so that the conventional puncture needle device is difficult to rotate in the left-right direction, and the size of a puncture needle opening is greatly limited.

Disclosure of Invention

The invention overcomes the defects of the prior art and provides the puncture needle device with the large opening of the covered stent.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a tectorial membrane support opening felting needle device that adjustable is bent which characterized in that: comprises an outer sheath, a puncture needle and a control guide wire; the pricking pin and the control guide wire are both arranged inside the outer sheath along the axial direction of the outer sheath; the number of the control guide wires is at least two, and the front ends of the control guide wires are respectively arranged on the inner wall of the front part of the outer sheath; the positions of the front ends of the control guide wires in the axial direction of the outer sheath are not completely the same; the front end part of the outer sheath is provided with an opening; the puncture needle can move back and forth along the axial direction of the sheath, and the front end of the puncture needle can extend out of the opening at the front end part of the sheath under the driving of external force; the control guide wire can move towards the outside of the outer sheath under the drive of external force.

Preferably, the rear end of the outer sheath is provided with a push-pull handle, and the rear end of the puncture needle is connected with the push-pull handle.

Preferably, the rear side of the outer sheath is provided with a guide wire opening facing backwards; the rear end of the control guide wire penetrates out of the guide wire opening.

As a preferred approach, the control guidewires are divided into two groups; the positions of the front ends of the control guide wires in the same group in the axial direction of the outer sheath are the same, and the positions of the front ends of the control guide wires in different groups in the axial direction of the outer sheath are different.

More preferably, each control guidewire group includes two control guidewires.

As a preferred scheme, a guide wire cavity is arranged in the outer sheath along the axial direction of the outer sheath, and the guide wire cavity is formed by combining a covering film and the inner wall of the outer sheath; the control guide wire is arranged in the guide wire cavity.

Preferably, the outer sheath is provided with a blood return tube extending in an axial direction thereof.

Preferably, the outer sheath is provided with a leading guide wire tube extending in an axial direction thereof.

The beneficial technical effects of the invention are mainly as follows: provides a puncture needle device with a large opening of a covered stent; compared with the conventional arrangement, the device is provided with two groups of control guide wires, and the front ends of the two groups of control guide wires, which are connected with the outer sheath, are arranged in front and back, so that the back part of the outer sheath can be bent, and the wall sticking points at the back part of the outer sheath during operation are reduced; the wall sticking points are reduced, the whole device has room for rotation, and the device can rotate left and right in the operation, so that the area which can be punctured by the puncture needle is enlarged, the opening of the passage is increased, and the flexibility of the operation is improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic structural view of a preferred embodiment of the present invention.

Fig. 2 is an enlarged view at a in fig. 1.

Fig. 3 is a cross-sectional view at B-B in fig. 1.

Figure 4 is a schematic illustration of a preferred embodiment of the present invention in use.

Fig. 5 is a schematic view of a conventional apparatus in use.

In the figure: 1 is sheath, 2 is felting needle, 3 is control guide wire, 4 is push-pull handle, 5 is covering film, 6 is guide wire cavity, 7 is guide wire opening, 8 is blood return pipe, 9 is leading guide wire pipe, 10 is covering film support, 20 is main blood vessel, 30 is branch blood vessel.

Detailed Description

The invention will now be described in further detail with reference to the accompanying drawings and examples, which are simplified schematic drawings and illustrate only the basic structure of the invention in a schematic manner, and thus show only the constituents relevant to the invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

As shown in FIGS. 1-5, the adjustable and bendable covered stent opening and puncturing needle device comprises an outer sheath 1, a puncturing needle 2 and a control guide wire 3; the sheath 1 is a soft sheath, the front end part of the sheath is provided with an opening, and the rear end part is provided with a push-pull handle 4; the felting needle 2 is a soft felting needle and is arranged inside the sheath 1 along the axial direction of the sheath 1, and the rear end of the felting needle is connected with the push-pull handle 4; the front end of the puncture needle 2 can extend out of or retract into the opening of the front end part of the sheath 1 under the push-pull driving of the push-pull handle 4.

A covering film 5 extending along the axial direction of the sheath 1 is arranged in the sheath 1, and a guide wire cavity 6 is formed by the covering film 5 and the inner wall of the sheath 1; the control guide wire 3 is arranged in the guide wire cavity 6 along the axial direction of the sheath 1, and the front end of the control guide wire 3 is fixedly connected with the inner wall of the front part of the sheath 1; four control guide wires 3 are arranged and divided into two groups; each group of control guide wires 3 is arranged in the same guide wire cavity 6; the front ends of the control guide wires 3 in the same group (namely the connection position with the sheath 1) are at the same position in the axial direction of the sheath 1, and the front ends of the control guide wires 3 in different groups are arranged in the front and back of the axial direction of the sheath 1; two guide wire openings 7 facing backwards are arranged on the side surface of the rear part of the outer sheath 1, and each guide wire opening 7 corresponds to one group of control guide wires 3; the rear ends of the control guide wires 3 penetrate out of the corresponding guide wire openings 7; the free end (namely the rear end) can be pulled by manpower or connected with other pulling mechanisms; the control guide wire 3 is moved to the outside of the sheath 1 by pulling; because the front end of the control guide wire 3 is fixedly connected with the inner wall of the sheath 1, when the control guide wire 3 moves outwards, the control guide wire can drive the connecting point of the sheath 1 and the control guide wire 3 to displace, so that the sheath 1 is bent.

In addition, a blood return tube 8 and a leading guide wire tube 9 are provided in the wall of the sheath 1, extending in the axial direction thereof.

When in use: extending the leading guidewire from the branch vessel 30 to the target location; then the leading guide wire is inserted into the leading guide wire tube 9, and the whole device moves to a target position along the path of the leading guide wire; then, the front part of the outer sheath 1 can be bent by pulling the group of control guide wires 3 with the front ends, so that the puncture needle 2 can be accurately bent to pass through the branch blood vessel 30 and puncture the covered stent 10 in the main blood vessel 20; at the moment, the back part of the sheath 1 is attached to the wall of the branch vessel 30; then, pulling the group of control guide wires 3 with the front ends at the back can bend the back part of the outer sheath 1, thereby releasing part of the anchorage points; the wall sticking points are reduced, so that the whole device has room for rotation, and the device can rotate (namely rotate left and right) in the branch vessel 30 by taking the whole advancing direction of the device as the axial direction to reach 5 degrees, thereby enlarging the area which can be penetrated by the puncture needle 2, increasing the opening of a passage and improving the flexibility of the operation.

In light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. But tuningout's tectorial membrane support opening felting needle device which characterized in that: comprises an outer sheath, a puncture needle and a control guide wire; the pricking pin and the control guide wire are both arranged inside the outer sheath along the axial direction of the outer sheath; the number of the control guide wires is at least two, and the front ends of the control guide wires are respectively arranged on the inner wall of the front part of the outer sheath; the positions of the front ends of the control guide wires in the axial direction of the outer sheath are not completely the same; the front end part of the outer sheath is provided with an opening; the puncture needle can move back and forth along the axial direction of the sheath, and the front end of the puncture needle can extend out of the opening at the front end part of the sheath under the driving of external force; the control guide wire can move towards the outside of the outer sheath under the drive of external force.

2. The adjustable curved stent graft opening spike device of claim 1, wherein: the back end of the outer sheath is provided with a push-pull handle, and the back end of the puncture needle is connected with the push-pull handle.

3. The adjustable curved stent graft opening spike device of claim 1, wherein: a guide wire opening facing backwards is arranged on the side surface of the back part of the outer sheath; the rear end of the control guide wire penetrates out of the guide wire opening.

4. The adjustable curved stent graft opening spike device of claim 1, wherein: the control guide wires are divided into two groups; the positions of the front ends of the control guide wires in the same group in the axial direction of the outer sheath are the same, and the positions of the front ends of the control guide wires in different groups in the axial direction of the outer sheath are different.

5. The adjustable curved stent graft opening spike device of claim 4, wherein: each control guidewire group includes two control guidewires.

6. The adjustable curved stent graft opening spike device of claim 1, wherein: a thread guide cavity is arranged in the outer sheath along the axial direction of the outer sheath, and the thread guide cavity is formed by combining a covering film and the inner wall of the outer sheath; the control guide wire is arranged in the guide wire cavity.

7. The adjustable curved stent graft opening spike device of claim 1, wherein: the outer sheath is provided with a blood return tube extending in an axial direction thereof.

8. The adjustable curved stent graft opening spike device of claim 1, wherein: the sheath is provided with a leading guide wire tube extending along the axial direction of the sheath.