CN212879699U

CN212879699U - Connection structure of multiple vascular stents

Info

Publication number: CN212879699U
Application number: CN202020118692.0U
Authority: CN
Inventors: 王盛强; 周艺; 葛思茗
Original assignee: Shanghai Ensheng Medical Technology Co ltd
Current assignee: Shanghai Ensheng Medical Technology Co ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2021-04-06
Anticipated expiration: 2030-01-19

Abstract

The utility model relates to the technical field of medical equipment, especially a connection structure of multiple vascular support. The multiple blood vessel stents at least comprise a woven stent and a cutting stent, and the woven stent and the cutting stent are connected in a sleeving or welding mode. The utility model discloses a connection structure makes two kinds or multiple supporting structure can the independent assortment, forms the integration support that has multiple good performance, and the linkage segment does not have the overlap, reduces the probability that forms the thrombus in the support. The defect that thrombus is easily formed due to mutual overlapping of the two or more stents which are required to be placed when long-section iliac vein lesion is treated in the prior art is avoided. The multiple connected stents ensure enough supporting force in the cutting type stent section and the connecting structure section, ensure the smoothness of the stent, avoid the blockage in the stent and prevent and reduce the occurrence of thrombus. The braided stent section has good flexibility and conformability and is more suitable for the bending section of a blood vessel.

Description

Connection structure of multiple vascular stents

Technical Field

The utility model relates to the technical field of medical equipment, especially a connection structure of multiple vascular support.

Background

Venous reflux disorder caused by iliac vein occlusion or stenosis, and chronic and difficult-to-recover diseases such as venous insufficiency of lower limb, varicose veins, edema of lower limb and the like caused by venous hypertension are called iliac vein compression syndrome or iliac vein thrombosis syndrome. The syndrome is not single in manifestation, and meanwhile, iliac femoral vein thrombosis can be caused to cause varicocele of spermatic cord of the male to influence the normal fertility of the male, so that the patency of the iliac vein is a very key index for clinical treatment. At present, related medical measures comprise traditional open surgery, but unstable factors such as large trauma and poor curative effect lead to that the treatment measures are rarely adopted clinically, and venous thrombosis easily occurs to target blood vessels after the open surgery. The intracavity operation is the ideal main treatment mode for treating the iliac vein occlusion at present, and the metal venous stent is placed at the iliac vein stenosis part through the interventional therapy mode, and can be implanted after sacculus expansion if necessary.

Although the clinical effect of the intracavity surgery is better than that of the open surgery, the surgical method still has some defects caused by the performance of the stent, and the currently clinically applicable iliac vein stent mainly has the following two structures: 1. the cutting type metal support is formed by laser engraving. 2. The metal braided stent is braided by filiform metal. The cutting type stent can be accurately positioned and placed in a diseased common iliac vein and has excellent supporting performance, however, for long-section iliac vein diseases, thrombus is easily formed in the stent by using the long-section cutting type stent, and the flexibility of the cutting type stent is not good, so that the whole iliac vein cannot be spanned in a long section. Compared with the prior art, the metal woven stent has good flexibility and can be ideally attached to a diseased blood vessel, however, the length of the woven structure cannot be generally fixed as the former and is easily shortened, so that the woven stent must enter the inferior vena cava by more than 2cm to ensure the normal operation of the stent, the opening of the lateral common iliac vein is shielded by the stent under the common condition, the reflux of the lateral common iliac vein is influenced, the probability of forming thrombus of the lateral common iliac vein is increased, the radial supporting force of the woven stent is not good, and the problem that the stent cannot completely support the iliac vein easily occurs.

Because of the advantages and limitations of the two stents, in the prior art, aiming at the treatment of long-section iliac vein lesion, two or more stents are often required to be placed at different parts of the iliac vein, and the multiple stents are easy to displace and overlap with each other, so that the overlapped parts generate vascular obstruction to form thrombus. Is not beneficial to the treatment and recovery of patients.

SUMMERY OF THE UTILITY MODEL

To above not enough, the utility model provides a connection structure of multiple vascular support for two kinds or multiple supporting structure can the independent assortment, both can provide sufficient radial support power for the demand position, can make the support have the compliance of expectation again, effectively reduces the emergence of endovascular thrombus, keeps vascular unobstructed for a long time.

The technical scheme of the utility model is that:

the utility model provides a connection structure of multiple vascular support, multiple vascular support is including weaving type support and cutting type support at least, weaving type support and cutting type support are connected with the mode of cup jointing or welding.

The sleeving mode comprises sleeving without a lantern ring, sleeving with a single lantern ring and sleeving with double lantern rings.

The lantern ring-free sleeve joint is that the tail end of the weaving type support directly penetrates through the tail end of the cutting type support to be connected.

The single lantern ring is sleeved, a lantern ring is arranged at the tail end of the cutting type support, and the tail end of the weaving type support directly penetrates through the lantern ring at the tail end of the cutting type support to be connected.

The double-lantern ring is sleeved, lantern rings are arranged at the tail end of the woven support and the tail end of the cutting support, and the lantern ring at the tail end of the woven support penetrates through the lantern ring at the tail end of the cutting support to be connected.

The lantern ring of the woven stent is connected to the tail end of the stent in a welding mode.

The welding mode is brazing or fusion welding.

The woven stent and the cutting stent are adjustable in length.

The utility model discloses a connection structure of multiple vascular support for two kinds or multiple vascular support are in order to cup joint or welded mode is connected, can the independent assortment, form the integration support that has multiple good performance, and the linkage segment does not have the overlap, reduces the probability that forms the thrombus in the support. The defect that thrombus is easily formed due to mutual overlapping of the two or more stents which are required to be placed when long-section iliac vein lesion is treated in the prior art is avoided. The integrated bracket ensures enough supporting force at the cutting type bracket section and the connecting structure section, ensures the smoothness of the bracket, avoids the blockage in the bracket and prevents and reduces the occurrence of thrombus. The woven stent section has good flexibility and conformability, forms a curve walking shape similar to an S shape, and is more suitable for the bending section of a blood vessel. The length of the segmented support can be freely adjusted according to the actual condition of the diseased blood vessel of the patient so as to meet the actual condition of the diseased blood vessel of the patient.

Drawings

FIG. 1 is a schematic view of the connection structure of the ferrule-less sleeve of the present invention;

FIG. 2 is a schematic view of the connection structure of the single-sleeve bushing of the present invention;

FIG. 3 is a schematic view of the connection structure of the double-ferrule sleeve of the present invention;

FIG. 4 is a schematic view of the welding connection structure of the present invention;

FIG. 5 is a partial view of the various vascular stent connector segments of the present invention;

fig. 6 is an overall view of the connected vascular stents of the present invention.

Detailed Description

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

Referring to fig. 5 and 6, the utility model discloses a connection structure of multiple vascular support, multiple vascular support is at least including weaving type support 10 and cutting type support 20, and both connect in order to cup joint or welded mode, the mode of cup jointing is including no lantern ring cup joint, the single lantern ring cup joints and the two lantern rings cup joints. The lengths of the woven stent 10 and the cut stent 20 can be freely adjusted according to actual conditions of the diseased vessel of the patient to meet the actual requirements of the diseased vessel.

Referring to fig. 1, the loop-free sheathing manner is such that the distal ends of the woven stent 10 directly penetrate the distal ends of the cut stent 20 to be connected. The connection method is that the metal wires at the tail end of the braided stent 10 are cut off, the cut metal wires directly pass through the circular ring at the tail end of the cutting stent 20, and the cut parts are reconnected in a welding mode, so that the mutual connection of the two stents is completed.

Referring to fig. 2, the single loop is coupled in such a manner that the distal end of the stent graft 20 has a loop 21 and the distal end of the woven stent 10 is directly inserted through the loop 21 of the distal end of the stent graft 20 to be coupled. The connection method is that the metal wires at the tail ends of the woven stent 10 are cut off, the cut metal wires pass through the lantern rings 21 at the tail ends of the cutting stent 20, and the cut parts are reconnected by welding, thus completing the mutual connection of the two stents.

In the above two connection modes, the metal wire at the end of the woven stent 10 directly passes through the cutting stent 20 without changing the design of the woven stent 10 and without additional processing of the end of the woven stent 10.

Referring to fig. 3, the double-loop coupling manner is such that the distal end of the woven stent 10 and the distal end of the stent graft 20 each have a loop 21, and the loops 21 of the distal end of the woven stent 10 pass through the loops 21 of the distal end of the stent graft 20 to be coupled. The connection is made by welding one end of the loop member to the end of the woven stent 10 and the other end of the loop member to the end of the woven stent 10 through the loop 21 of the cut stent 20.

Referring to fig. 4, the woven stent 10 may also be directly connected to the cut stent 20 by welding, such as soldering or welding.

The utility model discloses a connected mode of multiple vascular support for two kinds or multiple supporting structure can the independent assortment, form the integration support that has multiple good performance, and the linkage segment does not have the overlap, reduces the probability that forms the thrombus in the support. The defect that thrombus is easily formed due to mutual overlapping of the two or more stents which are required to be placed when long-section iliac vein lesion is treated in the prior art is avoided. The integrated bracket is arranged on the cutting type bracket section and the connecting structure section, so that enough supporting force is ensured, the bracket is ensured to be smooth, the blockage in the bracket is avoided, and the occurrence of thrombus is prevented and reduced; the woven stent section has good flexibility and conformability, forms a curve walking shape similar to an S shape, and is more suitable for the bending section of a blood vessel.

The above disclosure is only for the embodiment of the present invention, however, the present invention is not limited thereto, and any changes that can be considered by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. The utility model provides a connection structure of multiple vascular support, characterized in that, multiple vascular support is at least including weaving type support (10) and cutting type support (20), weaving type support (10) and cutting type support (20) are connected with the mode of cup jointing, the mode of cup jointing includes that no lantern ring cup joints, the single lantern ring cup joints and the double lantern ring cup joints.

2. The connecting structure of multiple vascular stents according to claim 1, wherein the loop-free sleeves are connected by directly passing the ends of the woven stent (10) through the ends of the cut stent (20).

3. The connecting structure of multiple vascular stents according to claim 1, wherein the single loop is sleeved in such a way that the distal end of the cutting stent (20) is provided with a loop (21), and the distal end of the woven stent (10) directly passes through the loop (21) at the distal end of the cutting stent (20) for connection.

4. The connecting structure of multiple vascular stents according to claim 1, wherein the double loops are sleeved, the end of the woven stent (10) and the end of the cut stent (20) are provided with loops (21), and the loops (21) at the end of the woven stent (10) penetrate through the loops (21) at the end of the cut stent (20) for connection.

5. The connecting structure of a plurality of blood vessel stents according to claim 4, wherein the loop (21) of the woven stent (10) is connected to the distal end of the stent by welding.

6. A plurality of vascular stent connection structures according to any one of claims 1 to 5, wherein the woven stent (10) and the cut stent (20) are adjustable in length.