Protective umbrella and far-end protective device for peripheral blood vessel

Abstract

The invention provides a protective umbrella and a far-end protective device for peripheral blood vessels, and relates to the field of medical instruments, the protective umbrella comprises a near-end developing ring, a near-end supporting ring, a supporting beam and a pocket-shaped elastic filter membrane; the near ends of the multiple supporting beams are connected to the near-end developing ring, and the multiple supporting beams are connected to the near-end supporting ring at intervals; the opening edge of the elastic filter membrane is connected to the near-end supporting ring, and the opening of the elastic filter membrane faces the near-end developing ring; a developing component is arranged on the near-end supporting ring, or a developing coating is coated on the near-end supporting ring. The far-end protective device for the peripheral blood vessel comprises the protective umbrella. The technical problems that an umbrella body structure of an existing far-end protective device for the peripheral blood vessel is poor in wall attaching performance at an inlet of an elastic filter membrane and the overall flexibility of the umbrella body structure of the far-end protective device is poor are relieved, and the operation safety is improved.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a protective umbrella and a distal protection device for peripheral blood vessels. Background technique [0002] Peripheral arterial embolic disease is a group of vascular diseases that seriously threaten human health. Its incidence rate has increased significantly in recent years. The most common vascular surgical disease is the main cause of chronic lower extremity ischemia, and its incidence increases with age. The incidence rate is 15.9%, and the incidence rate is about 33.8% over the age of 70, and the incidence rate of lower extremity arteriosclerosis obliterans in men is slightly higher than that in women. The etiology of lower extremity arteriosclerosis obliterans is still unclear. Hyperlipidemia, hypertension, diabetes and smoking are the main risk factors leading to lower extremity arteriosclerosis obliterans. The main cause of death is cardiovascular and c...

AI Technical Summary

Problems solved by technology

[0007] However, at present, the existing distal protection devices for peripheral blood vessels at least have the problems of poor adhesion of the umbrella structure at the entrance of the elastic filter membrane and poor overall flexibility of the umbrella structure of the distal protection device.

Among them, the poor adherence at the entrance of the elastic filter membrane is specifically manifested as: the umbrella structure of the existing peripheral vascular distal protection device is generally a structure in which the elastic filter membrane is covered on a spindle-shaped frame composed of multiple support rods. The entrance end of the inlet end of the elastic filter is supported at multiple points by the part in contact with multiple support rods, and the part of the elastic filter membrane between two adjacent support rods is not supported, that is, the structure of this part of the elastic filter membrane is not in contact with the vessel wall. When they fit together, the structure of this part of the elastic filter membrane will bend during filtration, which will cause part of the unfiltered blood to flow from the gap between the elastic filter membrane and the blood vessel wall to the distal end of the blood vessel, blocking the distal blood vessel, causing distal end tissue necrosis; the overall poor flexibility of the umbrella structure of the distal protection device is due to the need to set more support rods in order to minimize leakage. more damage to blood vessels during the

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