Temporary filter with far-end protector

A protector and temporary technology, applied in medical science, surgery, etc., can solve the problems of thrombus shedding, increased surgical risk, vascular embolism, etc., and achieve the possible effects of simple operation, reduced surgical risk, and reduced new danger.

Active Publication Date: 2013-11-13
BEIJING HONGHAI MICROTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing temporary thrombus filter has the problem and risk of new thrombus falling off when it is recovered and taken out. This is because the filter is compressed into the sheath during the recovery process, and the deformation changes greatly from the fully expanded state to the compressed state. The intercepted thrombus will cut and break, and enter the pulmonary artery with the direction of blood flow, causing new pulmonary embolism or entering other blood vessels of

Method used

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  • Temporary filter with far-end protector
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  • Temporary filter with far-end protector

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Embodiment Construction

[0024] See Figure 1-12 , the specific embodiment of the present invention is as follows: comprise sheath tube 1 and the strainer screen 2 that can expand and reduce diameter on sheath tube 1, there is a fixer 3 at the rear end of sheath tube 1, there is in the sheath tube 1 that can follow the sheath tube 1 inner channel The protective umbrella in the retracted state of the displacement has a recovery guiding device that can be connected with the sheath tube 1 rear end at any time. figure 1 As shown, the sheath tube 1 is a hollow tube made of medical polymer materials, and the filter screen 2 is 6 to 16 nickel-titanium alloy wires welded into a preset basket shape or made of a metal tube through laser engraving. One end of the filter screen 2 is welded to the front end 9, and the other end is welded to the rear end 8. Both the front end 9 and the rear end 8 are hollow structures, and the inner diameter of the rear end 8 is slightly smaller than that of the sheath tube 1. The...

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Abstract

The invention discloses a temporary filter with a far-end protector, which has high safety, is easy to collect and can be used for collecting thrombus. The temporary filter comprises a sheathing canal (1) and a filter screen (2) which is arranged on the sheathing canal (1) and can stretch for reducing the diameter, wherein a fixator (3) is arranged on the rear end of the sheathing canal (1); a protection umbrella is arranged in the sheathing canal (1), can move along the inner passage of the sheathing canal (1) and is in a contraction state; a collecting and guiding device is arranged and can be connected with the rear end of the sheathing canal (1) at any time. By utilizing the temporary filter, a thrombus falling problem which is caused by taking existing recycled filters or temporary filters out is solved, and surgical risks are reduced to the maximum extent.

Description

Technical field: [0001] The invention relates to an interventional medical device, in particular to a temporary filter with a distal protector suitable for thrombus recovery or a temporary filter placed along the direction of blood flow. Background technique: [0002] Pulmonary embolism has an acute onset, is prone to recurring, and has a high mortality rate. Recurrent small-area pulmonary embolism (involving less than 30% of the pulmonary vascular bed) can cause or aggravate respiratory diseases such as chronic pulmonary hypertension; large-area pulmonary embolism (more than 50% of the pulmonary vascular bed) can occur in a short It leads to death within a period of time, and its case fatality rate is 30%. Most of the disease is secondary to peripheral venous thrombosis. The use of clinical filters is mainly aimed at high-risk patients within a limited period of time, especially those who cannot receive anticoagulant therapy or have complications after anticoagulant thera...

Claims

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Application Information

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IPC IPC(8): A61B17/221A61L31/02
Inventor 王涛田昆玲
Owner BEIJING HONGHAI MICROTECH CO LTD
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