Artificial heart blood-pump capable of increasing blood pressure step by step

Abstract

The invention discloses a mechanical heart blood pump which boosts blood pressure steps by steps, pertaining to the technical field of biomedical engineering, relating to a mechanical heart blood pump for boosting blood pressure. The mechanical heart blood pump comprises a driving stator and a rotor; a controller connected with a driving stator provides a driving power source; the driving stator composed of annular coils is located in an interlayer composed of a cylindrical shell 13 and a tubular cavity 10; a supporting rotor comprises a head guide vane 1 and a tail guide vane 8; the head guide vane 1 is arranged in the front end of the tubular cavity 10, the tail guide vane 8 is arranged in the rear end of the tubular cavity 10 and a rotor between the head guide vane 1 and the tail guide vane 8 is also arranged in the tubular cavity 10. The mechanical heart blood pump is characterized in that: the mechanical heart blood pump is divided into a front grade and a rear grade, wherein, the front grade is a Grade 1 blood pump and the rear grade is a Grade 2 blood pump; the Grade 1 blood pump and the Grade 2 blood pump are respectively driven by the controller. The blood firstly flows through the Grade 1 blood pump to generate a blood pressure and then flows through the Grade 2 blood pump to generate another blood pressure; the two blood pressures are overlaid to reach a blood pressure needed by the human body, thus avoiding the problem that red blood cells are injured by the rotational speed increase of an impeller when a single blood pump works to obtain a relatively high blood pressure.

Description

Technical field [0001] The invention belongs to the technical field of biomedical engineering, and relates to an artificial heart blood pump that gradually increases blood pressure. Background technique [0002] Artificial heart can be divided into volume type and impeller type according to the working principle of its blood pump. Many impeller-type artificial hearts have been used in clinical practice due to their simple structure and small size. At the same time, the problem of hemolysis has plagued the safe use of impeller blood pumps. At present, most of the impeller blood pumps are single-stage blood pumps. The typical structure of this type of blood pump has only a set of blood pump units that compensate blood pressure and provide blood flow. Therefore, huge suction power is required to meet the requirements of blood pressure and blood flow rate. Claim. For example, in the patent document with the patent number US2006241335A1, the blood pump has an impeller to provide blood...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a two-stage artificial heart blood pump to solve the problem of insufficient blood pressure difference under the premise of ensuring that the red blood cells are not destroyed

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