PROBLEM TO BE SOLVED: To avoid labor and time by integrating two sensors of Doppler and labor pain mounted on an abdominal wall of a pregnant woman to also collect a Doppler signal at a mounting position of a labor pain meter, in fetus monitoring.SOLUTION: There is provided a configuration for obtaining a Doppler signal of a fetus heart using incidence at an oblique angle from part directly under the pit of the stomach, the part being an optimum position for a labor pain meter. For the purpose, a variable angle probe (Fig.1) of a semi-sphere liquid chamber dome type is used. Being magnetically attracted by a magnet piece (4) with a knob (3) from the outside, a transceiver assembly (2) freely moves along a ceiling on the inner side of a semi-sphere part of a dome-like liquid chamber (1) while changing the transceiver assemblys direction to set an azimuth angle of an ultrasonic beam (13) transmitted/received via a contact surface (5) in an arbitrary manner. A pressure sensor (10) is also provided inside the liquid chamber static pressure received by the contact surface (5) is detected according to Pascals principle by the pressure sensor to obtain an externally measured labor pain signal.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】胎児監視において妊婦の腹壁上に装着するドプラ陣痛の2つのセンサを一体化し、陣痛計の装着位置でドプラも信号採取するように構成する事で煩雑さを避ける。【解決手段】陣痛計にとって最適位置であるみぞおち直下部から高角度の斜角入射で胎児心のドプラ信号を得るように構成する。その目的のため半球液室ドーム式の可変角度探触子(図1)を用いる。送受波器アセンブリー(2)はドーム状の液室(1)半球部の内側の天井に沿って、外部からつまみ(3)のついた磁石片(4)で磁気吸引され方角を変えつつ自在に移動し、接触面(5)を介して送受される超音波ビーム(13)の方位角を任意に設定する。該液室内には圧センサ(10)が併設され、これにより接触面(5)の受ける静圧をパスカルの原理に従い検知し、もって外測陣痛信号を得る。【選択図】図1
