CN204484411U

CN204484411U - Desirable go out self-inflated hepatic vein reducing support

Info

Publication number: CN204484411U
Application number: CN201520169709.4U
Authority: CN
Inventors: 张庆桥; 黄乾鑫
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-03-25
Filing date: 2015-03-25
Publication date: 2015-07-22
Anticipated expiration: 2025-03-25

Abstract

The utility model discloses a kind of desirable go out self-inflated hepatic vein reducing support, it is connected and composed successively by rack body (1), connecting filament (2) and taking-up hook (3); Described rack body (1) forms at least one medical metal wire weaves mutually, and in the self-inflated conic net tubular structure that near-end is thick, far-end is thin; The isometric connecting filament (2) of the described equidistant welding of rack body (1) near-end three, connecting filament (2) terminal fusion being connected with taking-up hook (3); Wherein, described taking-up hook (3) structure in T shape.This utility model is while guaranteeing support support force, structure and normal hepatocytes venous anatomy match, and can reduce the incidence rate of stent restenosis, after completed treatment object, can take out through jugular vein approach, avoid the complication that support Preserving time produces.

Description

Desirable go out self-inflated hepatic vein reducing support

Technical field

This utility model relates to a kind of hepatic vein support, specifically a kind of desirable go out self-inflated hepatic vein reducing support, belong to technical field of medical instruments.

Background technology

Hepatic venous system or obturation are the major reasons causing liver rear profile portal hypertension, can produce a series of clinical symptoms such as refractory ascites, upper gastrointestinal hemorrhage, spleen enlargement, hypersplenism.Current Therapeutic Method mainly contains interventional therapy and surgical operation therapy; Interventional therapy comprises Transluminal balloon expansion plasty, intravascular stenting etc., pathological changes section can be directly acted on, more meet dissection and the physiological characteristics of human normal, and easy and simple to handle, Wicresoft, can to repeat, replace traditional surgery open surgery gradually, become the first-selected Therapeutic Method for the treatment of hepatic venous system or obstructive pulmonary disease at present.

Simple balloon angioplasty is often torn because of tunica intima and is caused tube chamber restenosis or obturation with elastical retraction, and the application of endovascular stent can prevent the elastical retraction after balloon expandable or interlayer to be formed, and improves vascular patency.

But be permanent metal support for hepatic venous support at present, and the shape of support is cylindrical, in stent endoprosthesis after-poppet, the incidence rate of restenosis is up to 23%, its reason is: on the one hand, not recyclable after conventional stent release, Preserving time can stimulate local vascular internal film tissue hyperplasia or thrombosis in human body, finally causes vascular restenosis even inaccessible; On the other hand, normal hepatocytes vein tube chamber is to the tapered pyramidal structure of distal end from proximal part, and existing hepatic vein support is isometrical cylindrical stent, there is release after-poppet diameter along the constant feature of long axis direction, this traditional intravascular stent is adopted to go to support obstructive position, hepatic vein distal end support/blood vessel diameter can be caused than excessive, the damage be subject to after blood vessel is softened is heavier, thus increase the weight of increment and the migration of vascular smooth muscle cell, or incite inflammation reacts, cause vascellum endometrial hyperplasia to increase the weight of or form thrombosis, adding the incidence rate of restenosis.

Summary of the invention

For above-mentioned prior art Problems existing, this utility model provide a kind of desirable go out self-inflated hepatic vein reducing support, while guaranteeing support support force, structure and normal hepatocytes venous anatomy match, the incidence rate of stent restenosis can be reduced, after completed treatment object, can take out through jugular vein approach, avoid the complication that support Preserving time produces.

To achieve these goals, the technical solution adopted in the utility model is: a kind of desirable go out self-inflated hepatic vein reducing support,

It is connected and composed successively by rack body, connecting filament and taking-up hook;

Described rack body is at least mutually woven by a medical metal wire and forms, and in the self-inflated conic net tubular structure that near-end is thick, far-end is thin;

The isometric connecting filament of the described equidistant welding of rack body near-end three, connecting filament terminal fusion being connected with taking-up hook;

Wherein, described taking-up hook structure in T shape.

The proximal diameter of described rack body is 10mm ~ 16mm, distal diameter is 4mm ~ 8mm, length is 30mm ~ 80mm.

Grid on described rack body assumes diamond in shape or to be squarely uniformly distributed, and density, is of moderate size.

Described desirable go out the material of self-inflated hepatic vein reducing support be NiTi or cobalt chromium memorial alloy.

Compared with existing support, this utility model material is NiTi or cobalt chromium memorial alloy, there is good histocompatibility, pliability and stability, launch in self-inflated after release, can insert in early days to open narrow or inaccessible hepatic vein, prevent the postoperative tube chamber restenosis of simple balloon expandable, improve Successful treatment with interventional rate.

Rack body diameter is distally tapered by near-end, compared with traditional isometrical cylindrical stent, more meets hepatic vein lumen shape, inserts rear relatively little to the dynamic (dynamical) change of Hepatic venous flow; And alleviate rack far end to the stimulation of hepatic vein blood vessel wall and damage, thus reduction tunica intima hyperplasia or thrombosis cause the incidence rate of in-stent restenosis, and then improve curative effect.

Take out hook in " T " font, one-sided with tradition " fish hook shape " takes out compared with hook, no matter rack body places orientation, the direction of being somebody's turn to do " T " hook is constant, more easily extracted by catching device, can operating time be shortened, reduce suffered radiation dose in clinicist and operation in patients.

Accompanying drawing explanation

Fig. 1 is this utility model structure overall schematic;

Fig. 2 takes out hook structure enlarged diagram in Fig. 1;

Fig. 3 of the present utility modelly inserts schematic diagram.

In figure: 1, rack body, 2, connecting filament, 3, take out hook.

Detailed description of the invention

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figure 1, a kind of desirable go out self-inflated hepatic vein reducing support,

It is connected and composed successively by rack body 1, connecting filament 2 and taking-up hook 3;

Described rack body 1 is at least mutually woven by a medical metal wire and forms, and in the self-inflated conic net tubular structure that near-end is thick, far-end is thin, namely the diameter of rack body 1 is distally tapered by near-end, more meet hepatic vein lumen shape, insert rear relatively little to the dynamic (dynamical) change of Hepatic venous flow;

The isometric connecting filament 2 of the described equidistant welding of rack body 1 near-end three, connecting filament 2 terminal fusion being connected with taking-up hook 3; As shown in Figure 2, wherein, described taking-up hook 3 structure in T shape, can take out safely completing PTCA or and STENTS, can avoid the complication that permanent indwelling produces.

Wherein, the grid on described rack body 1 assumes diamond in shape or to be squarely uniformly distributed, and density, is of moderate size.

The proximal diameter of described rack body 1 is 10mm ~ 16mm, distal diameter is 4mm ~ 8mm, length is 30mm ~ 80mm, with the hepatic venous length of human body, diameter matches.

Material of the present utility model is NiTi or cobalt chromium memorial alloy, there is good histocompatibility, pliability and stability, launch in self-inflated after release, can insert in early days to open narrow or inaccessible hepatic vein, prevent the postoperative tube chamber restenosis of simple balloon expandable, improve Successful treatment with interventional rate.

As shown in Figure 3, be positioned over right hepatic veins for this utility model and explain application process:

1, through internal jugular vein puncture, 6 ~ 8F carrier is delivered to right hepatic veins under guiding by seal wire;

2, this utility model is compressed in the carrier of caliber 6 ~ 8F;

3, by push rod, this support is delivered to right hepatic veins, make taking-up hook 3 be positioned at postcava;

4, fixing push rod, recession carrier, is released in right hepatic veins by this support;

5, when this support reclaims, can puncture through internal jugular vein approach;

6, seal wire inserts 6 ~ 8F sheath pipe to taking out near hook 3 under guiding;

7, insert snare through sheath pipe, extract the taking-up hook 3 of support; Tighten up snare under perspective, sheath pipe is slowly pushed ahead, make support be retracted in sheath, then support is taken out to external through sheath pipe.

In sum: this utility model material is NiTi or cobalt chromium memorial alloy, there is good histocompatibility, pliability and stability, launch in self-inflated after release, can insert in early days to open narrow or inaccessible hepatic vein, prevent the postoperative tube chamber restenosis of simple balloon expandable, improve Successful treatment with interventional rate.

Rack body 1 diameter is distally tapered by near-end, compared with traditional isometrical cylindrical stent, more meets hepatic vein lumen shape, inserts rear relatively little to the dynamic (dynamical) change of Hepatic venous flow; And alleviate rack far end to the stimulation of hepatic vein blood vessel wall and damage, thus reduction tunica intima hyperplasia or thrombosis cause the incidence rate of in-stent restenosis, and then improve curative effect.

Take out hook 3 in " T " font, one-sided with tradition " fish hook shape " takes out compared with hook, no matter rack body 1 places orientation, take out hook 3 " T " font hook direction constant, more easily extracted by catching device, can operating time be shortened, reduce suffered radiation dose in clinicist and operation in patients.

Claims

1. desirable go out a self-inflated hepatic vein reducing support, it is characterized in that,

It is connected and composed successively by rack body (1), connecting filament (2) and taking-up hook (3);

Described rack body (1) is at least mutually woven by a medical metal wire and forms, and in the self-inflated conic net tubular structure that near-end is thick, far-end is thin;

The isometric connecting filament (2) of the described equidistant welding of rack body (1) near-end three, connecting filament (2) terminal fusion being connected with taking-up hook (3);

Wherein, described taking-up hook (3) structure in T shape.

2. one according to claim 1 desirable go out self-inflated hepatic vein reducing support, it is characterized in that, the proximal diameter of described rack body (1) is 10mm ~ 16mm, distal diameter is 4mm ~ 8mm, length is 30mm ~ 80mm.

3. one according to claim 1 and 2 desirable go out self-inflated hepatic vein reducing support, it is characterized in that, the grid on described rack body (1) assumes diamond in shape or to be squarely uniformly distributed, and density, is of moderate size.

4. one according to claim 3 desirable go out self-inflated hepatic vein reducing support, it is characterized in that, described desirable go out the material of self-inflated hepatic vein reducing support be NiTi or cobalt chromium memorial alloy.