Double-umbrella-type recoverable venous thrombus filter

Abstract

The invention relates to a double-umbrella-type recoverable venous thrombus filter. The filter is composed of an upper part umbrella-shaped structure and a lower part umbrella-shaped structure. The upper part umbrella-shaped structure is composed of a recoverable hook, a connecting inner nut, a reverse prick and an upper part supporting rod, and the lower umbrella-shaped structure is composed of aconnecting pipe, a diamond filter net and a lower part supporting rod. Aiming at the problems that a single-umbrella-shaped venous thrombus filter exists in the market easily tilts under the flushingof blood resulting in poor thrombus capturing, and the structure of the contact position of the single-umbrella-shaped filter and a vascular wall is of a filiform structure which easily causes the puncturing of the vascular wall even hurts extra-vascular tissues, nerves and the like by stabbing, an upper and lower two-layer umbrella-shaped structure is provided by the filter to effectively maintain the balancing performance of the filter under the flushing of blood flow, and lower part supporting rod of the filter is bent inwards in the radial direction so that the supporting rod of the filter can be prevented from puncturing through the vascular wall to hurt the extra-vascular tissues, nerves and the like of a patient by stabbing. By means of the filter, not only can the thrombus capturing efficiency of the filter be improved, but also the using safety of the patient can be greatly improved.

Description

technical field [0001] The patent of the present invention relates to a medical device for the cardiovascular system, in particular to a recyclable vena cava thrombus filter that can filter floating thrombus in the vena cava system and prevent pulmonary embolism and pulmonary infarction. Background technique [0002] With the emergence of thrombus filtering devices on the market, more and more patients choose to implant thrombus filtering devices to prevent pulmonary embolism and pulmonary infarction. However, according to literature reports, patients who use a single umbrella-shaped vena cava thrombus filtering device will also have an inclination of the thrombus filtering device during follow-up follow-up, resulting in the inability to filter floating thrombus in the venous blood vessels, causing pulmonary embolism and pulmonary infarction again. . Furthermore, the single umbrella-shaped thrombus filtering device that appears on the market prevents slippage due to the fac...

AI Technical Summary

Problems solved by technology

However, according to literature reports, patients who use a single umbrella-shaped vena cava thrombus filtering device will also have an inclination of the thrombus filtering device during follow-up follow-up, resulting in the inability to filter floating thrombus in the venous blood vessels, causing pulmonary embolism and pulmonary infarction again.

Furthermore, the single umbrella-shaped thrombus filtering device that appears on the market prevents slippage due to the fact that this type of product is pierced into the vein wall by a filamentous structure. Cause the filamentous structure of this kind of product to pierce the blood vessel wall, or even pierce the extravascular tissue, nerves, etc. after piercing the blood vessel wall, resulting in unpredictable accidents

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