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Vena cava filter with anti-tilt supporting arm and processing method thereof

A support arm and vena cava technology, applied in the field of medical devices, can solve problems such as difficulty in recycling, poor self-neutrality of filters, poor filtering effect of retrievable vena cava filters, etc.

Pending Publication Date: 2020-10-20
EVANS SCI BEIJING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a vena cava filter with an anti-tilt support arm and its processing method to solve the problems of poor filtering effect, poor filter self-neutrality and difficult recovery of existing retrievable vena cava filters. question

Method used

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  • Vena cava filter with anti-tilt supporting arm and processing method thereof
  • Vena cava filter with anti-tilt supporting arm and processing method thereof
  • Vena cava filter with anti-tilt supporting arm and processing method thereof

Examples

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Embodiment 1

[0073] A specific embodiment of the present invention discloses a vena cava filter with a double-layer filter screen, such as Figure 1A and Figure 1B As shown, the vena cava filter includes a filter body, a recovery part 1 and a filter part, and the filter body, recovery part 1 and filter part are integrally cut; the recovery part 1 is arranged at the end of the filter body, and the recovery part 1 is provided with a recovery hook 11. The recovery hook 11 is integrally formed with the filter body, and the recovery hook 11 cooperates with the delivery device to realize the recovery and release of the vena cava filter; the filter part is composed of a filter screen 2 and a support component 3 .

[0074] Further, the filter screen 2 includes an upper layer filter screen 21 and a lower layer filter screen 22, and the upper layer filter screen 21 and the lower layer filter screen 22 are connected by connecting rods 23 between filter screens, such as figure 2 As shown, the filter...

Embodiment 2

[0098] Another specific embodiment of the present invention discloses a vena cava filter with an anti-tilt support arm, including a filter body, a recovery part 1 and a filter part. The difference from Embodiment 1 is that the filter part is composed of a support assembly 3 , the filter screen 2 is not provided, the support arm 31 extends outward from the bottom end of the recovery part 1, and is in an S-shaped structure, and the support assembly 3 composed of a plurality of support legs 32 and a plurality of support arms 31 in an S-shaped structure can act To the effect of the filter screen, the structure is simple and the filtering effect is good.

[0099] In this embodiment, the support arm 31 has a first end and a second end, the first end is connected to the bottom end of the recovery part 1 , and the second end is a free end and is located below the first end. There is a crest and a trough between the first end and the second end. Along the surface of the support arm 31,...

Embodiment 3

[0120] Another specific embodiment of the present invention discloses the processing method of the vena cava filter in Embodiments 1 to 2. The processing process is as follows: the vena cava filter is integrally cut by laser cutting technology, processed by heat treatment, sandblasting, and electrochemical polishing made.

[0121] Specifically: the nickel-titanium alloy tube is cut by a laser cutting machine to obtain the filter before forming, the filter before forming is subjected to heat treatment mold for shaping, and after the filter is formed, it undergoes surface treatment processes such as sandblasting and electrochemical polishing to obtain the final filter structure.

[0122] When cutting the recovery hook 11, the top of the recovery part 1 is rotated and cut downwards to form a downward arc-shaped sheet-like protrusion 111. The recovery hook 11 that has been rotated and cut has the highest point of the inner concave surface, and the inner concave surface The highest...

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Abstract

The invention relates to a vena cava filter with an anti-tilt supporting arm and a processing method of the vena cava filter, belongs to the technical field of medical instruments, and solves the problems that an existing recyclable vena cava filter is poor in filtering effect, poor in filter self-neutrality and difficult to recycle. The vena cava filter comprises a filter main body, a recovery part (1) and a filtering part, wherein the filter main body, the recovery part (1) and the filtering part are integrally arranged; the filtering part comprises a supporting assembly (3), the supportingassembly (3) is composed of a plurality of supporting arms (31) and a plurality of supporting legs (32), and the supporting arms (31) and the supporting legs (32) are evenly distributed in the circumferential direction of the filter body; and after the supporting arms (31) and the supporting legs (32) are opened, an upper opening filtering cavity (311) and a lower opening filtering cavity (321) are respectively formed. The filter is good in filtering effect, good in filter self-neutrality and easy to recycle.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a vena cava filter with an anti-tilt support arm and a processing method thereof. Background technique [0002] Venous thromboembolism (VTE) includes deep vein thrombosis (DVT) and pulmonary embolism (PE), both of which can be considered as different manifestations of the same disease in different periods. life and health. At present, anticoagulation is the main clinical treatment for deep vein thrombosis, but even if a sufficient amount of anticoagulant is given, there is still a risk of fatal pulmonary embolism. Implantation of inferior vena cava filter is an effective means to prevent secondary fatal pulmonary embolism after deep vein thrombosis. [0003] The filters used clinically in the past are usually permanent filters, but while preventing pulmonary embolism, they increase the risk of long-term thrombotic complications after filter implantation, thus limiting t...

Claims

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Application Information

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IPC IPC(8): A61F2/01
CPCA61F2/01A61F2002/016
Inventor 赵子健李雷
Owner EVANS SCI BEIJING CO LTD
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