Vein filter recovery catcher
A catcher and filter technology, which is applied in the direction of the filter in the blood vessel, can solve the problems of low capture success rate and high operation difficulty, and achieve the effect of preventing thrombus from leaking and improving the capture success rate
Pending Publication Date: 2020-05-05
上海善迪医疗科技有限公司
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is to provide a venous filter recovery catcher, which solves the problems of high difficulty in operation and low capture success rate of the current venous filter catcher
Method used
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[0022] In order to easily understand the technical means, creative features, goals and effects of the present invention, the present invention will be further described below in conjunction with specific illustrations.
[0023] Such as Figure 1-Figure 4 As shown, a venous filter recovery arrester is composed of an inner tube 1, an outer tube 2, and an expansion catching net 3. The inner tube 1 is set in the outer tube 2, and the expansion catching net 3 is made of memory wire. Trumpet-shaped net structure, the small mouth end of the expansion catch net 3 is connected with the end of the inner pipe 1, the outer pipe 2 is pushed forward along the inner pipe 1, and the bell mouth of the bound expansion catch net 3 shrinks and becomes smaller.
[0024] The expansion catch net 3 is made of nickel-titanium wire, and is shaped by heat treatment. The expansion catch net 3 self-expands within the temperature range of the human body, and the diameter of the widest part of the expansion...
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The invention discloses a vein filter recovery catcher, and belongs to the technical field of vein filter catchers. The vein filter recovery catcher is composed of an inner tube, an outer tube and anexpansion catching net, wherein the inner tube is inserted in the outer tube, the expansion catching net is of a horn-shaped net structure woven by memory metal wires, the small opening end of the expansion catching net is connected with an end of the inner tube, the outer tube is pushed forwards along the inner tube, and a horn opening for restraining the expansion catching net shrinks and becomes smaller. The expansion catching net is woven by nickel-titanium wires, can expand to the size of a blood vessel within the temperature range of the human body after being subjected to heat treatmentand shaping, and can be attached to the wall of the blood vessel; catching teeth bent inwards are arranged on the horn opening of the expansion catching net, and the catching success rate is furtherincreased; the expansion catching net is woven by the nickel-titanium wires, catching is carried out in the circumferential direction during recovery, and a barb of a filter recovery tube can be easily caught no matter where the barb is located; and due to the fact that catching is carried out in the circumferential direction, a filter cannot get loose in the recovery process.
Description
technical field [0001] The invention relates to a venous filter recovery catcher, which belongs to the technical field of venous filter catchers. Background technique [0002] The incidence of deep vein thrombosis (DVT) is increasing day by day. Once venous thrombosis falls off, it can enter and block the pulmonary artery with the blood flow, causing clinical manifestations of pulmonary embolism (PE). In the United States, the incidence of DVT is about 1 / 2 1000 people. Nearly one-third of untreated symptomatic patients develop PE. [0003] The most effective physical therapy for the prevention of PE is the placement of a thrombus filter in the vein. There are two types of thrombus filters: permanent filters or retrievable filters. The permanent filter is used to provide life-long filtering function. It has the largest fixation force of the vena cava intima. Studies have confirmed that the filter can effectively reduce the incidence of PE after implantation. However, long-...
Claims
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Login to View More IPC IPC(8): A61F2/01
CPCA61F2/01
Inventor 方萍
Owner 上海善迪医疗科技有限公司