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    • 4. 发明授权
    • System for treating blood processed in a cardiopulmonary bypass machine
and ultrasound filtration apparatus useful therein
    • 用于治疗在体外循环机中处理的血液的系统和其中有用的超声过滤装置
    • US5334136A
    • 1994-08-02
    • US467444
    • 1990-01-19
    • Karl SchwarzRichard S. MeltzerCharles C. Church
    • Karl SchwarzRichard S. MeltzerCharles C. Church
    • A61M1/36B01D19/00A61M1/30
    • B01D19/0078A61M1/3627A61M1/363
    • A system for reducing post-cardiopulmonary bypass encephalopathy due to microembolization of the brain of a patient with gaseous microbubbles (less than 40 microns in diameter) occurring during open-heart surgery using a cardiopulmonary bypass machine by passing a stream of blood from the patient through an ultrasonic traveling wave which propagates across the stream without reflection and sweeps the blood clean of the microbubbles without inducing blood cell trauma. The blood passes through a chamber between an input port and a filtrate exit port. An ultrasonic beam is projected so that a pressure maximum of the main lobe of the beam is centered at the filtrate exit port. The microbubbles are carried by the traveling wave to a waste exit port in the chamber downstream of the input port. To prevent establishment of resonance conditions, reflections and traveling waves the chamber may be submerged in a liquid bath and a body of acoustic absorbent material disposed at an end of the chamber opposite to the end into which the ultrasonic beam is projected.
    • 一种系统,用于通过使来自患者的血液流通过心肺旁路机器的患者的脑部微栓塞(小于直径小于40微米)而在心脏外科手术中发生的体外循环脑病系统, 超声波行波,其在没有反射的情况下传播,并扫描微泡的血液清洁而不引起血细胞损伤。 血液通过输入口和滤液出口之间的腔室。 投射超声波束,使得光束的主瓣的最大压力在滤液出口处居中。 微波通过行波携带到输入端口下游的室中的废物出口。 为了防止共振条件的建立,反射和行波,室可以浸没在液体槽中,并且吸声材料体设置在与突出超声波束的端部相反的端部处的吸声材料体。