Vena cava filter

Abstract

The invention discloses a vena cava filter. The vena cava filter comprises a filtering part, a binding part and a combining part, wherein the filtering part is arranged in the mode that the filtering part partially abuts against the inner wall of the vena cava; the binding part is made of biodegradable materials and is arranged in the mode that the binding part is connected with the filtering part at multiple positions and binds the filtering part; the combining part is arranged in the mode that the adjacent positions of the filtering part are connected with one another. Before the binding part is degraded, the vena cava filter is bound by the binding part to be of a cutting structure suitable for cutting thrombus flowing through the vena cava, and after the binding part is completely degraded, the vena cava filter is transformed into a support structure suitable for supporting the vena cava. The vena cava filter can be transformed into the support structure from the cutting structure more accurately after a period of preset time. The vena cava filter has the advantages of a conventional vena cava filter, for example, the vena cava filter is arranged in a minimally invasive surgery, the pain of a patient is little, and the side effects are low. A secondary surgery caused by recovery of the filter is avoided, and the relevant cost and the pain of the patient are further reduced.

Description

technical field [0001] The present invention relates to a vena cava filter, in particular to a vena cava filter partially containing degradable materials. Background technique [0002] Pulmonary embolism (Pulmonary embolism) refers to the pathological and clinical state caused by the impacted material entering the pulmonary artery and its branches, blocking the blood supply to the tissue. Its etiology is extensive, including: hypercoagulable state of blood, such as caused by trauma, major surgery, childbirth, tumor, taking contraceptive pills, smoking, genetic abnormal coagulation function, etc.; injury of vein wall, such as caused by surgery, fracture, infection Caused by other conditions; blood flow is slow, such as caused by sedentary, long-distance flight, long-term lying, atrial fibrillation, etc. [0003] Traditional treatment methods mainly include systemic anticoagulant therapy, and other methods include local thrombolysis and surgical thrombectomy. These tradition...

AI Technical Summary

Problems solved by technology

However, in these similarly designed vena cava filters, the end caps where multiple metal wires gather may have been entangled for a long time by coagulation and impaction substances in the blood. Therefore, even if the end caps degrade, the wires may not function as expected. stent

The unstretched metal wire will affect the normal access of blood vessels, resulting in relatively long-term and serious side effects

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