A dual-umbrella adjustable thrombus retrieval device

Abstract

The invention discloses a double-umbrella-type adjustable thrombus taking device and relates to cardiovascular and cerebrovascular thrombus taking devices. The device comprises an inner pipe, an outerpipe, a near-end catching umbrella and a far-end catching umbrella; the inner pipe is positioned in the outer pipe, and the inner pipe can slide relative to the outer pipe; a slot is arranged on theside surface of the outer pipe; in the slot, the near-end catching umbrella is configured to slide relative to the outer pipe along with the inner pipe, and the umbrella surface of the near-end catching umbrella can be supported and closed relative to the outer pipe; and the far-end catching umbrella is configured to slide relative to the outer pipe along with the inner pipe, and the umbrella surface of the far-end catching umbrella can be supported and closed relative to the outer pipe. According to the thrombus taking device disclosed by the invention, the thrombus can be caught on both sides, the clamping force is improved, and the falling or broken thrombus is prevented from escaping along with blood flow.

Description

technical field [0001] The invention relates to the field of a cardiovascular and cerebrovascular thrombus removal device, in particular to a double-umbrella adjustable thrombus removal device. Background technique [0002] Cardiovascular embolism may cause myocardial infarction and stroke, which poses a huge threat to human life and health. The current main treatment methods include drug thrombolysis, mechanical thrombectomy, and thrombus aspiration. Mechanical thrombus removal and thrombus aspiration both remove thrombus from human blood vessels by physical methods, so as to recanalize the blood vessels and restore the normal flow of blood to achieve the purpose of treatment. Mechanical thrombectomy relies on the assistance of guide wires and catheters to send the thrombus retrieval stent made of memory alloy material to the target position. After the thrombus retrieval stent is released, it captures the thrombus and pulls it into the catheter before taking it out of the ...

AI Technical Summary

Problems solved by technology

[0003] However, the existing thrombus retrieval stent is generally in the form of a roll after release, and can only capture the thrombus from one side, and the surface is made of grids, so the clamping force is limited, and the thrombus is easy to fall off from the thrombus retrieval scaffold

If the thrombus falls off or breaks, the existing thrombus retrieval stent can no longer be captured, and the broken or broken thrombus escapes with the blood, which poses a huge risk

In addition, the diameter of the existing thrombectomy stent cannot be adjusted after release, and the adaptability to blood vessels is poor

Specifically, if the diameter of the selected stent is too large, it is easy to scratch the blood vessel during thrombectomy; if the selected size is too small, it is difficult to capture large thrombus

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