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Removal-free temporary vena cava filter and manufacture method thereof

A vena cava, temporary technology, applied in the direction of the filter in the blood vessel, etc., to achieve the effect of simple production, avoiding complications and costs, and low cost

Inactive Publication Date: 2012-12-19
SHANGHAI SIXTH PEOPLES HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems of many defects in the existing vena cava filter, the present invention provides a new type of temporary vena cava filter without taking out and its manufacturing method

Method used

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  • Removal-free temporary vena cava filter and manufacture method thereof
  • Removal-free temporary vena cava filter and manufacture method thereof
  • Removal-free temporary vena cava filter and manufacture method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0044] refer to Figure 1~Figure 3 , The vena cava filter described in this method includes elastic support wires 1. In this embodiment, the number of elastic support wires 1 is 8, which are arranged vertically at equal intervals around the same central axis. One end of the elastic support wire 1 is bundled and fixed in the end cap 4 , and the other end of the elastic support wire 1 is connected to the support ring 2 to form a cage structure with one end open and the other end bundled.

[0045] The support ring 2 can be made of Figure 4 The zigzag wire shown is made end to end, and the preferred production method is as follows: the metal wire is repeatedly bent to form 8 corners on both sides, and made into a zigzag wire (zigzag wire), and the zigzag wire Parts are all in the same plane, and then connected end to end to form a ring. The support ring 2 can be a circular ring, a polygonal or an elliptical ring, and is preferably a circular ring, and each section of the ring h...

Embodiment 2

[0052] refer to Figure 1~Figure 3 , On the basis of Example 1, this embodiment also includes a short wire 3, the short wire 3 is made of 316L stainless steel, with a diameter of 0.28~0.30mm and a length of 3mm. One end is connected to the middle section of the elastic support wire, and the other end is a free end, and the free end is made into a tip and faces the end cap 4 . The angle between the short wire 3 and the elastic support wire is 45°.

[0053] The short wire 3 can further play a role of fixing, preventing the vena cava filter from moving under the action of blood flow and thrombus. It should be noted, however, that other methods of fixing may also be used.

[0054] In addition, in the above-mentioned embodiment, the elastic support wire 1, the support ring 2, the short wire 3 and the end cap 4 can all be made of X-ray-impermeable material, or at least one of them is made of X-ray-impermeable material made, or at least part of one of its components, of an X-ray o...

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Abstract

The invention provides a removal-free temporary vena cava filter and a manufacture method thereof. A plurality of elastic support wires are arranged in the same direction by enclosing the same central axis; one end of each elastic support wire is collected and fixed on an end cap, and the other end of each elastic support wire is connected to a support ring, so that a cage-shaped structure with one end opened and the other end collected is formed; after the end cap which is made of a degradable material is degraded in a preset time, the metal wires in a collection region are restored by means of own elasticity, and attached to the vascular wall to form a structure similar to an intravascular stent, so that the vessel lomen can be completely opened, lumen inflammatory stenosis caused by the filter can be dilated, and the vascular wall is endothelialized; the metal wires supporting on the vascular wall can be embedded by the blood vessel, so that the lumen becomes smooth and clear; and only once venipuncture operation is required, and secondary surgery for taking out, and related complication and cost can be saved.

Description

technical field [0001] The invention relates to a medical device, in particular to a vena cava filter with functions of filtering and intercepting thrombus. Background technique [0002] The incidence of venous thromboembolism (VTE) is about 100 people / 100,000 people / year, and 10-40% of them will have a thrombus detached from its original position and enter the pulmonary artery with the blood flow, that is, pulmonary embolism (PE). Part of PE can lead to sudden death in patients. For the vast majority of VTE patients, conventional anticoagulant and thrombolytic therapy are very effective. However, with the increasing number of complex cases among inpatients, clinicians still encounter some contraindications to anticoagulant therapy, such as the need for major surgery on the abdomen, pelvis or lower limbs, pregnancy, bleeding disorders, etc., or in anticoagulant therapy. VTE patients with life-threatening bleeding during coagulation therapy. In this case, the primary throm...

Claims

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Application Information

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IPC IPC(8): A61F2/01
Inventor 赵珺张扬
Owner SHANGHAI SIXTH PEOPLES HOSPITAL
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