Recyclable vena cava filter

A vena cava and filter technology, applied in the direction of filters in blood vessels, etc., can solve the problems of easy to cause hemolysis, blood flow disturbance, complex structure, etc., and achieve the effect of improving the filtering effect, good adherence and anti-shedding.

Pending Publication Date: 2021-07-23
INNER MONGOLIA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its contact with the blood vessel wall is limited, and its adherence, stability, and anti-shedding properties need to be further improved during use, and the structure of the part where it captures and filters thrombus is relatively complicated, which significantly disturbs the blood flow and easily causes hemolysis. Phenomenon

Method used

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  • Recyclable vena cava filter
  • Recyclable vena cava filter
  • Recyclable vena cava filter

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Embodiment Construction

[0047] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0048] as attached Figures 1 to 4 The shown retrievable vena cava filter includes a recovery column 1, a vena cava filter body in an expanded and folded state, the vena cava filter body includes a filter rod assembly connected to the recovery column 1, and a support connected to the filter rod assembly. rack 5.

[0049] as attached figure 1 and 2 As shown, the filter rod assembly includes a plurality of first filter rods 3 and a plurality of second filter rods 4, the first filter rod 3 includes a first part 31 and a second part 32, the upper end of the first part 31 is connected to the lower end of the recovery column 1 The lower end of the first part 31 is connected with the upper end of the second part 32 , and the lower end of the second part 32 is connected with the supporting frame 5 . The upper end of the second filter rod 4 is conne...

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Abstract

The invention relates to a recyclable vena cava filter. The recyclable vena cava filter comprises a recycling column and a vena cava filter body with unfolded and folded states, wherein the vena cava filter body comprises a filtering rod assembly and a support frame; the filtering rod assembly comprises a plurality of first filtering rods and a plurality of second filtering rods; when the filter is unfolded, an included angle A formed by the first filtering rod and the central axis of the recycling column is greater than an included angle B formed by the second filtering rod and the central axis of the recycling column; the distance from the lower end part of the first filtering rod to the central axis of the recycling column is smaller than the distance from the lower end part of the second part to the central axis of the recycling column; the support frame comprises a plurality of support rod pieces which are evenly arranged around the central axis of the recycling column and are of a closed structure; and when the filter is unfolded, the located plane of each support rod piece is parallel to the central axis of the recycling column. The vena cava filter provided by the invention has high structural stability, good wall adherence, good anti-falling performance, high embolus capture rate and small influence on blood circulation.

Description

technical field [0001] The invention belongs to the technical field of medical equipment, and in particular relates to a recoverable vena cava filter. Background technique [0002] Deep vein thrombosis (DVT) refers to abnormal coagulation of blood in deep veins due to vessel wall damage, blood stasis, blood hypercoagulability, etc. Embolism (Pulmonary embolism, PE). Inferior vena cava filter (IVCF) is a device designed to prevent pulmonary embolism caused by emboli falling off in deep vein thrombosis of the lower extremities. It can effectively prevent fatal PE and is widely used in clinical practice. The inferior vena cava filter can capture large clots, and then dissolve or break down the large clots into smaller blood clots through catheter thrombolysis, and disperse them to the small branches of the pulmonary artery, reducing the impact of thrombus on the pulmonary circulation. [0003] At present, the types of filters can be divided into permanent, retrievable and con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/01
CPCA61F2/01A61F2002/018
Inventor 冯海全马双全李长胜谭海鸥
Owner INNER MONGOLIA UNIV OF TECH
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