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retrievable thrombus filter

A filter and thrombus technology, applied in the direction of filters in blood vessels, etc., can solve the problems of unfavorable permanent implants, self-corrosion, and high toxicity of corrosion products, so as to avoid the production of toxic substances, slow down the speed of creep, and increase the creep rate. The effect of difficulty

Active Publication Date: 2017-10-17
SHENZHEN KYD BIOMEDICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

, In addition, the nut usually used to connect the push rod is made of stainless steel, which is welded in the filter tube of nickel-titanium alloy. Different materials are prone to self-corrosion under the action of body fluids
Corrosion products are highly toxic, which is not conducive to permanent implantation in the body

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 2 , 3 As shown in , 4 and 5, in this embodiment, the filter 1 is formed by integral laser cutting of a nickel-titanium alloy tube, and the nickel-titanium alloy tube used has anti-magnetic properties and does not affect nuclear magnetic resonance imaging. The filter has a cage-like structure as a whole, and has excellent mechanical stability, is not easy to deform, break and fall apart, and maintains its structural integrity. Such as figure 2 As shown, the retrievable thrombus filter involved in the present invention can be placed at the position of the inferior vena cava 7 between the renal vein 9 and the iliac vein 8 through an interventional method to prevent the thrombus from the lower extremities from ascending into the lungs and causing pulmonary embolism. Such as image 3 As shown, a two-layer filter design is adopted, including a near-end net 2 and a far-end net 3 . The support rod 4 connecting the proximal net 2 and the distal net 3 adopts ...

Embodiment 2

[0042] Such as Figure 7 , Figure 8 and Figure 9 As shown, the retrievable thrombus filter provided in this embodiment is the same as that in Embodiment 1. It is formed by laser cutting a nickel-titanium alloy tube as a whole. The nickel-titanium alloy tube used has anti-magnetic properties and does not affect MRI. Its cage-like structure has excellent mechanical stability, is not easy to deform, break and fall apart, and maintains its structural integrity. The retrievable thrombus filter provided in this example can also be placed at the position of the inferior vena cava 7 between the renal vein 9 and the iliac vein 8 through an interventional method to prevent lower extremity thrombus from ascending into the lungs and causing pulmonary embolism. Such as Figure 7 As shown, a two-layer filter design is adopted, including a near-end net 2 and a far-end net 3 . The support rod 4 connecting the proximal net 2 and the distal net 3 adopts a concave design. The support rod ...

Embodiment 3

[0044] Such as Figure 10 , Figure 11 and Figure 12 As shown, on the basis of Embodiment 1, a recovery hook 5 similar to that at the proximal end is provided at the distal end to form a two-way connectable feature. During vena cava filter implantation, a transfemoral or transjugular access is usually used. In order to realize that one filter is suitable for two access requirements, two retrieval hooks 5 are respectively arranged at the proximal end and the distal end of the filter 1 for connecting with the push rod 15 . Femoral vein and jugular vein can also be used for recovery.

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Abstract

The invention discloses a recyclable thrombus filter, which is placed in the inferior vena cava between the renal vein and the iliac vein through an interventional method, so as to prevent the thrombus from the lower extremities from ascending into the lungs and causing pulmonary embolism. Filter screen design, including: a near-end net, a far-end net and a support rod connected between the proximal net and the far-end net, the support rod adopts a concave design, and the concave design includes a concave part and a The proximal point and the distal point connected to the upper and lower sides of the concave part, the proximal point and the distal point are attached to the inner wall of the blood vessel to support the blood vessel, and the proximal point is provided with an anchor The thorns play a fixed role and prevent the filter from being displaced under the washing of blood. The invention is a recyclable thrombus filter which has good thrombus filtering effect, can be positioned repeatedly, is fixed and stable, and can prolong the implantation time.

Description

technical field [0001] The invention relates to a recyclable thrombus filter which has good thrombus filtering effect, can be positioned repeatedly, is fixed stably, and can prolong the implantation time. Background technique [0002] Currently, the incidence of deep venous thrombosis (deep venous thrombosis, DVT) and pulmonary thromboembolism (pulmonarythromboembolism, PE) is increasing day by day. As the most serious complication of DVT, PE has very high morbidity and mortality. According to epidemiological surveys in recent years, the annual incidence of PE in the United States alone is 750,000 to 900,000, and the annual death toll is 120,000 to 150,000. Pulmonary thromboembolism not only has a very high morbidity and mortality rate, but also has a sudden onset and rapid progression. Generally, patients with pulmonary thromboembolism die within the first hour of onset. Pulmonary thromboembolism also leads to chronic pulmonary hypertension, which seriously affects the liv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/01
Inventor 陈奕龙黄伟
Owner SHENZHEN KYD BIOMEDICAL TECH CO LTD
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