CN218338572U

CN218338572U - TIPS support convenient to installation

Info

Publication number: CN218338572U
Application number: CN202221796667.3U
Authority: CN
Inventors: 周春泽; 吕维富; 成德雷
Original assignee: Anhui Provincial Hospital First Affiliated Hospital of USTC
Current assignee: Anhui Provincial Hospital First Affiliated Hospital of USTC
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2023-01-20
Anticipated expiration: 2032-07-12

Abstract

The utility model relates to the technical field of medical equipment, a TIPS support convenient to installation is specifically disclosed. The split-joint type venous stent comprises at least two sections; the spliced venous stent and the connecting end of the blood vessel to be pressed are both provided with positioning components for assisting the installation of the venous stent, and at least two sections of the spliced venous stents are connected in series to form a complete venous stent. The utility model discloses a TIPS support not only can pinpoint to accurate control support total length can effectively avoid occuping and blockking normal blood vessel chamber, reduces the formation of support blocking phenomenon and thrombus, simple structure easily promotes moreover.

Description

TIPS support convenient to installation

Technical Field

The utility model belongs to the technical field of medical instrument, specifically relate to a TIPS support convenient to installation.

Background

Portal hypertension is a group of clinical syndromes caused by elevated portal system pressure due to various causes, and is most commonly seen in cirrhosis of the liver due to various causes. The pressure rise of the portal vein can cause various complications such as esophageal and gastric fundus varices rupture bleeding, refractory hepatic ascites and the like, and the quality of life of a patient is reduced and the life cycle of the patient is short. The incidence rate of the disease is high, according to relevant statistics, the number of the liver disease patients in China is more than 4 hundred million, and about 700 million patients with hepatic cirrhosis portal hypertension need to be treated every year.

The treatment of the hepatic cirrhosis portal hypertension relates to a plurality of disciplines, including a plurality of treatments such as medicines, endoscopes, interventions, surgeries and the like. Transjugular Intrahepatic Portosystemic Shunt (TIPS) is a minimally invasive interventional technique for establishing a shunt channel in the hepatic parenchyma between the hepatic vein and the portal vein through an implanted support, remarkably reducing portal vein resistance structurally in a minimally invasive manner and treating portal hypertension-related complications. In recent years, the covered stent made of PTFE has achieved better portal hypertension control rate and stent patency rate, and has gradually replaced the bare stent to become the recommended stent for TIPS operation. However, there are still some problems with the currently used stents. Since the TIPS stents currently in use are generally a one-piece metal stent, one end of the stent is designed to be a mesh. When the blood vessel stent is installed, in order to prevent blood in the portal vein and the hepatic vein from flowing out along the respective stent installation positions, the net-shaped end of the blood vessel stent is installed in the portal vein, and the other end of the blood vessel stent is installed in the hepatic vein; however, because the degree of the two ends of the blood vessel support positioned in the portal vein and the hepatic vein can not be accurately grasped, operators need to replace different supports according to different patients, and the arrangement openings of the blood vessel support are required to be arranged in the portal vein and the hepatic vein simultaneously, so that higher requirements are provided for the arrangement time and the operation process of the blood vessel support. The integral blood vessel stent is complex to operate during operation and installation, and partial stent catheters in the portal vein and the hepatic vein occupy the space of the vein blood vessel, so that a series of problems are caused, which are mainly shown in that (1) redundant stent parts in the portal vein and the hepatic vein block the blood flow of the corresponding liver, so that the liver function is reduced and the corresponding blood vessel is thrombotic; (2) the extra stent in the portal vein and the hepatic vein can increase the difficulty of the later liver transplantation operation, and even make some patients lose the chance of liver transplantation; (3) an included angle is formed between the redundant part of the stent in the portal vein and the hepatic vein and the vessel wall, so that the stent is blocked, the patency rate of the stent is reduced, and the portal vein high pressure relapse is caused.

At present, a plurality of research reports at home and abroad show that fewer stents are designed for indications by intrahepatic portal vein shunt through jugular vein. At present, the three TIPS stents which are most clinically used in China are respectively a Wallgraft metal stent of the family Bordeaceae,

TIPS Endoprosthesis and Barde medical Vascular Steel gradient covered Stent, wherein

TIPS is specifically approved by the national drug administration to be suitable for establishing an artificial shunt channel in the hepatic parenchyma between a hepatic vein and a portal vein, while Vascular Stent Graft and Wallgraft covered Stent of bard medical national drug administration only approve the TIPS to be suitable for interventional therapy of iliac and femoral artery stenosis, and the TIPS is clinically used in the ultra-adaptation syndrome. These stents all present the potential risk of occupying portal and hepatic venous spaces or angulation with normal blood vessels, and there is a need for the development and application of new TIPS stents.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a TIPS support convenient to installation, this support is the location of not only installing easily, simple structure moreover, easily promotes.

In order to achieve the above object, the utility model provides a following technical scheme:

a TIPS stent convenient for installation, which is characterized by comprising at least two sections of spliced venous stents; the spliced venous stent and the connecting end of the blood vessel to be pressed are both provided with positioning components for assisting the installation of the venous stent, and at least two sections of the spliced venous stents are connected in series to form a complete venous stent.

Preferably, the positioning assembly comprises an inclined elliptical end surface; the inclined elliptical end surfaces are respectively arranged at two ends of the complete venous stent and form inclined installation angles with tube bodies at two ends of the complete venous stent.

Preferably, the inclined elliptical end face is provided with a positioning wire extending outwards along the end face; the number of the positioning wires is at least three, the positioning wires are distributed at equal intervals along the circumferential direction of the inclined elliptical end surface, and the positioning wires are reversely folded to the outer walls of the tube bodies at the two ends of the complete venous stent under the action of the stent mounting sleeve.

Preferably, the positioning wire is made of memory alloy and is arranged in a corrugated shape.

Preferably, the splittable venous stent comprises a proximal stent and a distal stent; one end of the near-end bracket is set as a sleeving end; one end of the far-end bracket is set as an adjusting end; the adjusting end of the far-end bracket is sleeved in the sleeved end of the near-end bracket.

Preferably, the adjusting end of the distal bracket is flared.

Preferably, the sleeved end of the proximal bracket is provided with an adjusting scale.

Preferably, the near-end stent and the far-end stent are both arranged to be elastic catheters with slightly adjustable pipe diameters, and the outsides of the elastic catheters are provided with covering films.

Preferably, the oblique installation angle of both ends of the complete venous stent is 20 degrees.

Preferably, the surface of the positioning wire is covered with a human blood vessel absorbable material.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) The utility model discloses set up near-end support and distal end support, carried out the portal vein connection that blood dredged with the one end of distal end support and needs, the other end and near-end leg joint, and the other end and the hepatic vein connection of near-end support. Through the arrangement, the whole traditional blood vessel stent is divided into two parts, even into a plurality of sections according to the actual installation requirement. Therefore, an operator can select a combination mode of the support according to actual installation requirements, and the flexibility of the support is improved.

(2) The utility model discloses a link of distal end support and near-end support sets up to adjusting the end, and the link of near-end support and distal end support then sets up to the suit end, and the regulation end suit of distal end support is in the suit end of near-end support. Because distal end support and near-end support are the elastic conduit, during actual operation, operating personnel packs in the tip of the adjusting end of distal end support along the suit end of near-end support, make the suit end of near-end support draw together a little, and adjust the end and set up to loudspeaker form, under the combined action of the elastic conduit elastic retraction of itself and the constraint of tectorial membrane to near-end support pipe wall, adjust the end and be connected with the suit end more closely, avoided blood along the junction seepage of near-end support and distal end support, the security and the stability of intravascular stent use have been promoted.

(3) The utility model discloses a set up the terminal surface of near-end support and hepatic vein junction into the oval terminal surface of slope, and the oval terminal surface of slope forms the slope installation angle with the pipe shaft of near-end support. By the design, the connection part of the near-end bracket and the hepatic vein can simulate the natural trend close to the human vascular vein, so that blood flows more naturally and smoothly after entering the hepatic vein along the near-end bracket, and the overall use effect of the bracket is improved.

(4) The utility model discloses a set up on the oval terminal surface of slope of near-end support and have three location silk at least, the location silk outwards extends along the terminal surface of the oval terminal surface of slope, and the equidistant distribution of circumference of the oval terminal surface of slope is followed to the location silk. Because the positioning wire is made of memory alloy, the positioning wire can automatically open in the vein cavity of the hepatic vein, and an operator slightly pulls back the proximal bracket to enable the positioning wire to be tightly attached to the inner wall of the vein cavity of the hepatic vein. In addition, the positioning wire is arranged in a corrugated line shape, and the surface of the positioning wire is covered with a human blood vessel absorbable material. The contact area of the positioning wire and the inner wall of the hepatic vein in unit distance is increased, the positioning wire is connected with the hepatic vein more tightly, and therefore the installation effect between the near-end bracket and the hepatic vein is improved.

(5) The utility model discloses a be equipped with on the outer wall of the suit end of near-end support and adjust the scale. The length of the adjusting end of the far-end bracket sleeved in the sleeved end of the near-end bracket can be adjusted by an operator according to the distance between the portal vein and the hepatic vein during actual operation. Therefore, convenience of installing the blood vessel support is improved, flexibility of installing the support is improved, blood transfusion effect of the blood vessel support is improved by integrally adjusting the blood vessel support to a proper length, and then the integral treatment effect of the blood vessel support on portal vein is improved.

Drawings

Fig. 1 is a sectional view of the present invention after installation.

Fig. 2 is a schematic structural view of the distal end bracket of the present invention.

Fig. 3 is a schematic structural diagram of the present invention.

The utility model discloses each reference numeral is as follows with the actual corresponding relation of part name:

a-portal vein B-hepatic vein

11-near-end stent 12-adjusting end 13-far-end stent 14-positioning wire 15-coating

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

A TIPS stent for easy installation as shown in fig. 1-3, comprising a proximal stent 11 and a distal stent 13, wherein the proximal stent 11 and the distal stent 13 are each configured as a flexible catheter having a radially slightly smaller diameter. The elastic catheter is externally provided with a film 15, the film 15 wraps the outer wall of the elastic catheter and limits over expansion of the elastic catheter, and therefore the tube diameter of the proximal stent 11 and the tube diameter of the distal stent 13 can be recovered after expansion.

The portal vein a and the hepatic vein B constitute blood vessels to be pressed of the proximal stent 11 and the distal stent 13. In actual use, one end of the proximal stent 11 is connected to the hepatic vein B. In order to facilitate the blood flow in the catheter and simulate the vein trend of a human body blood vessel, the end face of the joint of the proximal stent 11 and the hepatic vein B is set to be an inclined elliptical end face 16, and the inclined elliptical end face 16 and the tube body of the proximal stent 11 form an inclined installation angle of 20 degrees. During actual operation, an operator rotates the near-end bracket 11 according to the trend of the hepatic vein B until the inclined installation angle of the near-end bracket 11 is matched with the trend of the hepatic vein B, so that the near-end bracket 11 and the hepatic vein B are in natural transition, blood flows more naturally after entering the hepatic vein B along the near-end bracket 11, and the use effect of the bracket is improved.

The inclined elliptical end surface 16 of the proximal stent 11 is further provided with positioning wires 14, the positioning wires 14 extend outwards along the end surface of the inclined elliptical end surface 16, and at least three positioning wires 14 are distributed at equal intervals along the circumferential direction of the inclined elliptical end surface 16.

In actual use, the positioning wires 14 are folded back to the outer walls of the tube bodies at the two ends of the complete venous stent under the action of the stent mounting sleeve. The end part of the near-end bracket 11 provided with the inclined elliptical end surface 16 is conveyed into the hepatic vein B by the bracket mounting sleeve, and the bracket mounting sleeve is removed after an operator adjusts the mounting angle of the near-end bracket 11 according to the trend of the hepatic vein B. Because the positioning wire 14 is made of memory alloy, the positioning wire 14 automatically opens in the vein cavity of the hepatic vein B, and the operator slightly pushes the proximal bracket 11 forward, so that the positioning wire 14 is tightly attached to the vein cavity inner wall of the hepatic vein B. In addition, because the positioning wire 14 is arranged in a wavy line shape, the contact area of the positioning wire 14 and the inner wall of the vein cavity of the hepatic vein B at a unit distance is increased, so that the connection between the positioning wire 14 and the hepatic vein B is tighter, and the surface of the positioning wire 14 is covered with a human blood vessel absorbable material, thereby improving the installation effect between the proximal stent 11 and the hepatic vein B.

One end of the distal stent 13 is connected to the portal vein a to be catheterized, and the other end is connected to the proximal stent 11. The structure of the connecting end of the far-end bracket 13 and the portal vein A is the same as that of the connecting end of the near-end bracket 11 and the hepatic vein B, and in actual operation, the far-end bracket 13 is installed after the near-end bracket 11 is installed, and the specific installation mode is also the same as that of the near-end bracket 11. Namely, the positioning wire 14 is automatically opened in the lumen of the portal vein A, and the operator slightly pulls back the far-end venous stent 13 to ensure that the positioning wire 14 is tightly attached to the inner wall of the lumen of the portal vein A

The connecting end of the far end bracket 13 and the near end bracket 11 is set as an adjusting end 12, the connecting end of the near end bracket 11 and the far end bracket 13 is set as a sleeving end, and the adjusting end 12 of the far end bracket 13 is sleeved in the sleeving end of the near end bracket 11. Because distal end support 13 and near-end support 11 are the elastic conduit, during actual operation, operating personnel packs in the tip of the regulation end 12 of distal end support 13 along the suit end of near-end support 11 for the suit end of near-end support 11 is little including, and regulation end 12 sets up to loudspeaker form, under the combined action of elastic conduit elastic retraction itself and tectorial membrane 15 to the constraint of near-end support 11 pipe wall, regulation end 12 is more inseparable with the suit end is connected, blood has avoided the junction seepage of blood along near-end support 11 and distal end support 13, the security and the stability of the use of support have been promoted.

In addition, an adjusting scale is arranged on the outer wall of the sleeved end of the near-end bracket 11. In actual operation, an operator adjusts the length of the adjusting end 12 of the distal bracket 13 sleeved in the sleeved end of the proximal bracket 11 according to the distance between the portal vein a and the hepatic vein B. Such setting has not only promoted the convenience of blood vessel support installation, has promoted the flexibility of support mounting moreover, has improved present blood vessel support installation dilemma greatly, and the suitable length of blood vessel support has also promoted blood transfusion effect of blood vessel support simultaneously, and then has promoted blood vessel support to portal vein A's whole treatment.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A TIPS stent convenient to install is characterized by comprising at least two sections of splicing vein stents; the spliced venous stent and the connecting end of the blood vessel to be pressed are both provided with positioning components for assisting the installation of the venous stent, and at least two sections of the spliced venous stents are connected in series to form a complete venous stent.

2. A TIPS stent for ease of installation according to claim 1, wherein; the positioning assembly includes an inclined elliptical end surface (16); the inclined elliptical end surfaces (16) are respectively arranged at two ends of the complete venous stent and form inclined installation angles with tube bodies at two ends of the complete venous stent.

3. A TIPS stent for ease of installation according to claim 2 wherein the inclined oval end surface (16) has a retaining wire (14) extending outwardly therefrom; the number of the positioning wires (14) is at least three, the positioning wires are distributed at equal intervals along the circumferential direction of the inclined elliptical end surface (16), and the positioning wires are reversely folded to the outer walls of the tube bodies at the two ends of the complete venous stent under the action of the stent mounting sleeve.

4. A tiss stent for ease of installation according to claim 3, wherein the positioning wire (14) is made of memory alloy and is provided in the form of an undulating wire.

5. A TIPS stent convenient to install according to claim 1 or 2 or 3 or 4, wherein the splittable venous stent comprises a proximal stent (11) and a distal stent (13); one end of the near-end bracket (11) is set as a sleeving end; one end of the far-end bracket (13) is arranged as an adjusting end (12); the adjusting end (12) of the far-end bracket (13) is sleeved in the sleeved end of the near-end bracket (11).

6. A TIPS scaffold for facilitating mounting according to claim 5, wherein the adjustment end (12) of the distal scaffold (13) is flared.

7. A TIPS holder for facilitating mounting according to claim 6, wherein the sleeved end of the proximal holder (11) is provided with adjustment graduations.

8. A TIPS stent convenient to install as claimed in claim 7, wherein the proximal stent (11) and the distal stent (13) are both provided as elastic catheters with slightly adjustable tube diameters, and the elastic catheters are externally provided with covering membranes (15).

9. A ready-to-mount TIPS stent according to claim 8, wherein the oblique mounting angle of the ends of the complete venous stent is 20 degrees.

10. A TIPS stent convenient to install as claimed in claim 4, wherein the surface of the retaining wire (14) is covered with a material absorbable by human blood vessels.