Half-blade-rotor-type axial flow blood pump

Abstract

The invention discloses a half-blade-rotor-type axial flow blood pump which comprises an inner barrel, a front guide, a rotor and a rear guide. The front guide has three straight blades, the rotor has two rotating blades, the two rotating blades of half-blade structures are distributed on a front half of a hub of the rotor only, and blade tip clearance length of the rotor is reduced by a half; the rear guide has three big rotating blades and three small rotating blades, the big rotating blades and the small rotating blades are distributed at intervals, each big rotating blade is provided with a suspension arm with one-half length, each suspension arm extends into a rotor area to form a suspension arm blade structure, and a runner portion on the outer surface of the rotor is made by smooth date-pit-shaped cubic spline curves. The half-blade-rotor-type axial flow blood pump has the advantages that a whole runner formed by the front guide, the rotor and the rear guide is designed to be of a date-pit-shaped structure, and the smooth cubic spline curves are adopted, so that pressure rise of the blood pump is increased, flow field distribution in the pump is improved, area of a rotating-stilling interface is reduced, and risk of thrombosis at a bearing is lowered.

Description

technical field [0001] The patent of the present invention relates to the technical field of axial flow blood pumps. It is a half-blade rotor axial flow blood pump structure in which only half of the blades are on the rotor, and the blades of the rear guide rectifier cantilever and extend into the rotor area. The structure is extremely large. The blood damage at the tip of the rotor is reduced, and the inner rotor part of the blood pump is designed as a jujube-shaped structure to reduce the thrombus in the bearing area of ​​the axial flow blood pump. Background technique [0002] The main consequence of heart failure of all causes is a decrease in the heart's ability to pump blood. The role of the circulatory auxiliary blood pump is to compensate or replace the heart function, reduce the preload of the heart, benefit the recovery and balance of myocardial metabolism and nutrition, and promote the recovery of heart function. For the heart that cannot fully restore heart funct...

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Problems solved by technology

[0006] The problem that the axial flow blood pump needs to solve is hemolysis and thrombus. Severe hemolysis in the blood pump will cause the patient to bleed, and the thrombus will block the blood vessel and cause stroke or embolism.

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