| 摘要 |
An auxiliary mechanical heart (10) consisting of a blood tube (14) by which the blood ejected from the heart ventricle is fed into the auxiliary mechanical heart; a one-way valve (22) provided in the blood tube which opens exclusively toward the auxiliary mechanical heart side; an afterload regulatory chamber (11) in which the blood ejected from the heart ventricle is tentatively pooled; a pressure sensor (23) by which the pressure in the afterload regulatory chamber (11) is detected; a blood pump (25); a driving controller (26) for the pump; a blood tube (16) for the arterial blood; and a probe (27) and a blood flow meter (28) for measuring the blood flow rate of the blood pump (25). The pressure in the afterload regulatory chamber (11) is controlled so that the one-way valve (22) is closed in the ventricular diastolic phase while, in the ventricular systolic phase, the whole blood ejected from the heart ventricle flows toward the afterload regulatory chamber (11). Thus, this novel auxiliary mechanical heart is elaborated so that the self-heart can eject the blood at a low ejection resistance and effect sufficient dilation and contraction.
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