CN114028050A

CN114028050A - Support adherence assistor

Info

Publication number: CN114028050A
Application number: CN202111484079.6A
Authority: CN
Inventors: 张葳琳
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-02-11

Abstract

The invention provides a stent wall-adhering assistor, which belongs to the technical field of medical instruments and comprises: a push rod is slidably sleeved at the proximal end of the guide wire; the expansion net is of a tubular structure and is sleeved on the guide wire, the near end of the expansion net is connected with the push rod, and the far end of the expansion net is connected with the far end of the guide wire; the guide wire is suitable for moving towards the push rod and pressing the expansion net to axially retract and radially expand. The expansion net provides radial support for the inner wall of the whole dense net stent from 360 degrees, so that the outer wall of the dense net stent is completely attached to the vessel wall; after the expansion of the expansion net is finished, the guide wire and the push rod move synchronously to push the expansion net to move along the bending track of the blood vessel, so that each part of the dense net support is correspondingly attached to the blood vessel wall; the situations that the dense net stent is not released in place and the wall is not adhered completely are avoided.

Description

Support adherence assistor

Technical Field

The invention relates to the technical field of medical instruments, in particular to a stent wall-adhering assistor.

Background

Aneurysms are a common vascular defect that results from weakening of the vessel wall and subsequent expansion and dilation of the vessel wall. The vessel wall may become progressively thinner and, at some locations, the vessel wall may rupture due to continued blood flow pressure.

The dense-mesh stent is called a blood flow guiding stent, crosses aneurysm in blood vessel, reconstructs artery wall, changes the blood flow direction of lesion part, avoids the impact of blood on the inner wall of aneurysm, and further achieves the purpose of treating the aneurysm of blood vessel.

The diseased vessel environment may have tortuosity or three-dimensional bending, the dense mesh stent is not released in place after being conveyed to the intravascular diseased site, and the condition that the stent cannot adhere to the wall or cannot adhere to the wall completely can occur; the close net stent has poor adherence condition, which can cause partial stenosis, block blood circulation and easily cause thrombus.

Disclosure of Invention

Therefore, the invention aims to solve the technical problem of overcoming the defect that the dense mesh stent in the prior art is easy to adhere to the wall or cannot adhere to the wall completely, thereby providing a stent wall adhering assistor.

In order to solve the technical problem, the invention provides a stent wall attaching auxiliary device, which comprises:

a push rod is slidably sleeved at the proximal end of the guide wire;

the expansion net is of a tubular structure and is sleeved on the guide wire, the near end of the expansion net is connected with the push rod, and the far end of the expansion net is connected with the far end of the guide wire;

the guide wire is suitable for moving towards the push rod and pressing the expansion net to axially retract and radially expand.

Further, the far-end cover of seal wire is equipped with the elastic component, the distal end of elastic component with the seal wire is connected, the near-end of elastic component with the distal end of inflation net is connected, the elastic component provides the extrusion force that makes the inflation net produce the axial retraction.

Further, the elastic member has a developing structure.

Further, one end of the elastic piece facing the expansion net is connected with a first clamping ring, and the elastic piece is connected with the far end of the expansion net through the first clamping ring.

Further, the first snap ring has a developing structure.

Furthermore, a second snap ring is connected to one end of the push rod, which faces the expansion net, and the push rod is connected with the near end of the expansion net through the second snap ring.

Further, the second snap ring has a developing structure.

Further, an arc-shaped cap is connected to the end face of the far end of the guide wire, and the far end of the elastic piece is connected with the arc-shaped cap.

The technical scheme of the invention has the following advantages:

1. according to the wall-adhering assisting device for the stent, the expanded expansion net provides radial support for the inner wall of the whole dense-net stent from 360 degrees, so that the outer wall of the dense-net stent is completely attached to the wall of a blood vessel; after the expansion of the expansion net is finished, the guide wire and the push rod move synchronously to push the expansion net to move along the bending track of the blood vessel, so that each part of the dense net support is correspondingly attached to the blood vessel wall; the situations that the dense net stent is not released in place and the wall is not adhered completely are avoided.

2. According to the wall-adhering support for the stent, the elastic piece can enable the expansion net to slowly expand in the process of pulling the guide wire and enabling the expansion net to expand, so that strong extrusion of the expansion net to blood vessels due to sudden change is avoided; and moreover, after the dense mesh stent is attached to the vascular wall in place, the elastic piece can enable the expansion mesh to retract rapidly and ensure the expansion mesh to recover the original shape, and the expansion mesh is ensured to be withdrawn safely.

3. According to the support wall attaching auxiliary device provided by the invention, the elastic part is provided with the developing structure, so that the expansion condition of the elastic part can be observed conveniently; the first clamping ring and the second clamping ring are provided with developing structures, and the positions of the expansion net are judged by observing the positions of the first clamping ring and the second clamping ring so as to judge whether the wall attaching operation to the bracket is finished; in addition, the arrangement of the first clamping ring and the second clamping ring enables the connection among the elastic piece, the expansion net and the push rod to be firmer.

4. According to the wall-adhering support for the stent, the arc-shaped cover cap is arranged, so that the connection of the elastic piece is facilitated, and the scratch of the far end of the guide wire on the vessel wall is avoided.

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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural view of the anchorage device provided in the present invention in an unexpanded state.

Fig. 2 is a schematic structural view of the anchorage device in an expanded state.

Fig. 3 is a schematic view of the position relationship between the adherence assisting device and the dense net support.

Fig. 4 is a schematic diagram of the position relationship of the wall-adhering assistor when the dense-mesh stent is in the fitting process.

Fig. 5 is a schematic diagram of the position relationship of the wall-adhering assistor when the dense-mesh stent is completely attached.

Description of reference numerals:

1. a guide wire; 2. a push rod; 3. an expanded mesh; 4. an elastic member; 5. a first snap ring; 6. a second snap ring; 7. an arc-shaped cover cap; 8. a dense net support; 9. a blood vessel; 10. a conduit.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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 invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but 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 construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The support adherence assistor that this embodiment provided includes: the device comprises a guide wire 1, a push rod 2, an expansion net 3, an elastic piece 4, a first clamping ring 5 and a second clamping ring 6.

As shown in fig. 1, the push rod 2 is made of a flexible material, is slidably sleeved at the proximal end of the guide wire 1, and is close to one end of the far end of the guide wire 1, and a second snap ring 6 is fixedly sleeved at the position of the push rod 2. The far-end face of the guide wire 1 is connected with an arc-shaped cap 7, and the arc-shaped cap 7 can prevent the far end of the guide wire 1 from scratching the wall of the blood vessel 9. Elastic component 4 is the spring, and the cover is established the distal end department of seal wire 1, elastic component 4 the distal end with arc block 7 fixed connection, the near end fixedly connected with first snap ring 5 of spring, first snap ring 5 cover is established on the seal wire 1. The expansion net 3 is located between the elastic piece 4 and the push rod 2, the seal wire 1 is sleeved with the expansion net 3, the near end of the expansion net 3 is fixedly connected with the first snap ring 5, and the far end of the expansion net 3 is fixedly connected with the second snap ring 6.

As shown in fig. 2, the push rod 2 is kept in a fixed position, and the guide wire 1 is pulled towards the push rod 2 to compress the elastic member 4; at this time, the distal end of the elastic member 4 has a resilient force, which acts on the distal end of the expanded mesh 3 through the first snap ring 5 to cause the expanded mesh 3 to axially retract and radially expand.

The elastic member 4, the first snap ring 5 and the second snap ring 6 are all made of platinum-iridium alloy, and the platinum-iridium alloy has a developing characteristic, so that the elastic member 4, the first snap ring 5 and the second snap ring 6 all have a developing effect. The expansion state of the expansion net 3 is judged by observing the expansion and contraction condition of the elastic piece 4; and judging the position of the expansion net 3 by observing the positions of the first snap ring 5 and the second snap ring 6, and further judging whether the wall adhering operation on the bracket is finished.

As an alternative embodiment, the surfaces of the elastic member 4, the first snap ring 5, and the second snap ring 6 may be coated with a development coating; the surfaces of the elastic member 4, the first snap ring 5 and the second snap ring 6 can be adhered with developing sheets.

The working principle is as follows:

as shown in fig. 3, the adherence assisting device is arranged inside the dense mesh stent 8 in a penetrating manner, and enters the lesion of the blood vessel 9 together with the dense mesh stent 8; while the catheter 10 is withdrawn, the dense mesh stent 8 is expanded and released; at this time, the part of the expanded mesh 3 of the adherence aid protrudes from the distal end of the dense mesh stent 8;

as shown in fig. 4 and 5, the guide wire 1 is pulled to axially retract and radially expand the expansion net 3 of the anchorage device; after the expansion net 3 is expanded in place, the guide wire 1 and the push rod 2 move synchronously, so that the outer wall of the dense net support 8 is attached to the wall of the blood vessel 9 from far to near in 360 degrees;

after the dense mesh stent 8 is completely attached to the wall of the blood vessel 9, the dense mesh stent contacts with the tension of the guide wire 1, so that the elastic part 4 naturally rebounds to drive the expansion mesh 3 to radially retract; after the expansion net 3 is retracted to the position, the adherence assisting device and the catheter 10 are withdrawn from the blood vessel 9 together.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A stent wall attachment aid comprising:

the guide wire (1) is sleeved with a push rod (2) at the near end in a sliding manner;

the expansion net (3) is of a tubular structure and is sleeved on the guide wire (1), the near end of the expansion net (3) is connected with the push rod (2), and the far end of the expansion net (3) is connected with the far end of the guide wire (1);

the guide wire (1) is suitable for moving towards the push rod (2) and pressing the expansion net (3) to axially retract and radially expand.

2. The stent anchorage-dependent device according to claim 1, wherein the distal end of the guide wire (1) is sleeved with an elastic member (4), the distal end of the elastic member (4) is connected with the guide wire (1), the proximal end of the elastic member (4) is connected with the distal end of the expanded mesh (3), and the elastic member (4) provides a pressing force for axially retracting the expanded mesh (3).

3. The stent anchorage-dependent device according to claim 2, wherein the elastic member (4) has a visualization structure.

4. The stent anchorage device according to claim 2, wherein a first snap ring (5) is connected to the end of the elastic member (4) facing the expansion mesh (3), and the elastic member (4) is connected to the distal end of the expansion mesh (3) via the first snap ring (5).

5. The stent anchorage-dependent device according to claim 4, wherein the first snap ring (5) has a visualization structure.

6. The stent anchorage device according to claim 1, wherein a second snap ring (6) is connected to the end of the push rod (2) facing the expansion net (3), and the push rod (2) is connected to the proximal end of the expansion net (3) through the second snap ring (6).

7. The stent anchorage-dependent device according to claim 6, wherein the second snap ring (6) has a visualization structure.

8. The stent anchorage-dependent device according to claim 2, wherein an arc-shaped cap (7) is connected to the distal end face of the guide wire (1), and the distal end of the elastic member (4) is connected to the arc-shaped cap (7).