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    • 8. 发明授权
    • Methods and apparatus for reducing localized circulatory system pressure
    • 减少局部循环系统压力的方法和装置
    • US08091556B2
    • 2012-01-10
    • US09839643
    • 2001-04-20
    • Gad KerenRandy Kesten
    • Gad KerenRandy Kesten
    • A61B19/00
    • A61M27/006A61B17/00234A61B2017/00243A61B2017/00252A61F2/2412A61F2/2493A61M1/1008A61M1/101A61M1/1098A61M1/122A61M1/125A61M27/002
    • Methods and apparatus for decreasing cardiac pressure in a patient by implanting a shunt communicating with an area outside a first portion, whereby a volume of blood sufficient to reduce pressure in a first portion is released. Preferably, the end diastolic pressure in the left ventricle is reduced, which is accomplished by having the shunt communicate with the left ventricle so a small volume of blood is released from the left ventricle. Most preferably, the shunt selectively permits flow when a pressure differential between the left ventricle and another chamber of a heart above a threshold pressure, so that shunting is prevented during left ventricular systole, or, alternatively, selectively permits flow when a pressure differential between the left ventricle and another chamber of a heart is between a lower threshold and a higher threshold. In certain embodiments a semi-passive check-valve is controlled and actuated by an external signal.
    • 通过植入与第一部分之外的区域连通的分流器来降低患者心脏压力的方法和装置,由此释放足以减少第一部分中的压力的​​体积的血液。 优选地,左心室的舒张末期压力降低,这是通过使分流器与左心室连通而实现的,因此从左心室释放少量的血液。 最优选地,当左心室和心脏另一腔室之间的压差高于阈值压力时,分流器选择性地允许流动,使得在左心室收缩期间防止分流,或者当选择性地允许 左心室和心脏的另一个腔室处于较低阈值和较高阈值之间。 在某些实施例中,半被动止回阀由外部信号控制和致动。