公开(公告)号：US5076284A

公开(公告)日：1991-12-31

申请号：US607432

申请日：1990-10-23

申请人： James W. Joyce ,  Nassy Srour ,  Michael V. Scanlon ,  Stephen M. Tenney ,  George Mon ,  John P. Gills

发明人： James W. Joyce ,  Nassy Srour ,  Michael V. Scanlon ,  Stephen M. Tenney ,  George Mon ,  John P. Gills

IPC分类号： A61B7/02

CPC分类号： A61B7/023

摘要： A heart-sound monitor and esophageal stethoscope which makes use of fluidicaminar proportional amplifiers (LPAs). These LPA's are used to sense and amplify incoming acoustic pressure signals, such as heart signals. Moreover, the fluidic monitor is able to monitor a fetus heartbeat while eliminating the acoustic interference present from the mother's heartbeat. In this case, the LPA acts not only as an amplifier, but as an acoustic filter as well.

摘要翻译： 一种使用流体层流比例放大器（LPAs）的心音监视器和食管听诊器。 这些LPA用于感测和放大传入的声压信号，例如心脏信号。 此外，流体监测器能够监测胎儿心跳，同时消除母体心跳的声学干扰。 在这种情况下，LPA不仅用作放大器，而且用作声学滤波器。