Percutaneous blood pump and mesh basket thereof

Abstract

The invention relates to a percutaneous axial blood pump for treating heart diseases and a mesh basket thereof. The mesh basket is mounted on the percutaneous axial blood pump. The mesh basket comprises an expandable tube; the expandable tube comprises an impeller area and a far end area; the far end area is fixedly connected with the impeller area; the impeller area and the far end area are arranged along the axial direction of the expandable tube; the impeller area is used for accommodating the impeller of the percutaneous axial blood pump, and the pipe diameter of the impeller area is larger than the pipe diameter of the far end area; and the impeller area of the expandable tube is positioned in an aorta and the far end area of the expandable tube is positioned in a left ventricle. As the pipe diameter of the impeller area of the expandable tube is larger than the pipe diameter of the distal end area of the expandable tube, the expandable tube does not easily move from the aorta tothe left ventricle. As the pipe diameter of the impeller area is large, the radial size of the impeller can be increased, so that the rotating speed of the impeller can be reduced on the premise of ensuring an auxiliary flow of 5L / min, the heating phenomenon of transmission parts such as bearings, rotating shafts and the like can be reduced, and a thrombus phenomenon caused by heating of the partscan be reduced.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a percutaneous blood pump for treating heart diseases and a mesh basket thereof. Background technique [0002] In a method of treating heart disease, a percutaneous blood pump may be inserted between the left ventricle and the aortic arch to assist the pumping function of the heart. A percutaneous blood pump consists of a mesh basket and an impeller within the mesh basket. Both the basket and the impeller have a compressed state and an expanded state. When the percutaneous blood pump is implanted in the patient's body, the mesh basket and the impeller are in a compressed state for easy entry into the body. After the percutaneous blood pump enters the heart, both the basket and the impeller are in a state of natural expansion, the impeller is located in the aorta, and the distal end of the basket is located in the left ventricle of the patient. When the percutaneous blo...

AI Technical Summary

Problems solved by technology

[0005] The gap between the impeller and the inner wall of the basket is too small. During the high-speed rotation of the impeller, the impeller is likely to collide with the inner wall of the basket. At the same time, when the blood passes through the gap between the impeller and the inner wall of the basket, the shear stress is extremely high. Severe damage to blood cells, during blood pump work, patients may have severe hemolysis symptoms

Images