PROBLEM TO BE SOLVED: To provide a device for estimating a cardiac volume and a cardiac output, the device capable of detecting time series variation of the cardiac volume and of the cardiac output of a measurement subject in a non-contact and unconstrained manner.SOLUTION: The device for estimating a cardiac volume and a cardiac output comprises: a transmission unit 12 and a transmitting antenna 13 for applying microwave toward the heart of a human body a receiving antenna 14 and a receiving unit 15 for receiving the microwave passing through the heart a detection unit 16 for detecting the microwave and detecting a detection signal and an estimation unit for estimating the change of the cardiac volume and of the cardiac output based on the change of the amplitude or the phase of the detection signal. When a transmitted radio wave intensity is E0, a detection signal strength is E, a damping constant of the radio wave passing through the heart is α and a cardiac volume is V, the time series variation of the cardiac volume V estimated by the following mathematical formula 1 is estimated to be a change of the cardiac volume. (mathematical formula 1) V=-π/6 1/α3 ln(E/E0)3.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】非接触かつ非拘束で測定対象者の心容積及び心拍出量の時系列変化を検出することができる心容積及び心拍出量の推定装置を提供する。【解決手段】人体の心臓に向けてマイクロ波を照射する送信部12及び送信アンテナ13と、心臓を透過したマイクロ波を受信する受信アンテナ14及び受信部15と、 マイクロ波を検波して検波信号を検出する検波部16と、検波信号の振幅又は位相の変化に基づいて心容積及び心拍出量の変化を推定する推定部とを備え、送信した電波の強度をE0とし、検波信号の強度をEとし、心臓を透過する電波の減衰定数をαとし、心容積をVとし、以下の数式1により推定された心容積Vの時系列変化を心容積の変化と推定する。 (数式1)V=-π/6・1/α3・ln(E/E0)3【選択図】図2
