Problem to be solved: to provide an ultrasonic measuring apparatus which can be used in an extracorporeal circulation device and can measure blood flow and concentration.The ultrasonic measuring apparatus 1A comprises an ultrasonic transducer 10a, 10b used in an extracorporeal circulation device 100A, and a measuring circuit 20A for measuring blood flow and concentration, and a measuring circuit 20A transmits a transmitting portion 21, a receiving part 22, and a transmission Based on the transmission signal transmitted by the portion 21 and the received signal received by the receiver 22, the flow rate calculating part 24a for calculating the blood flow rate and the attenuation degree of the amplitude of the received signal to the amplitude of the transmitted signalA density calculating section 25 for calculating blood concentration is provided.Diagram【課題】体外循環装置に用いられ、血液の流量及び濃度を測定可能な超音波測定装置を提供すること。【解決手段】超音波測定装置1Aは、体外循環装置100Aに用いられ、血液回路110に取り付けられる超音波送受波器10A、10Bと、血液の流量及び濃度を測定する測定回路20Aと、を備え、測定回路20Aは、送信部21と、受信部22と、送信部21により送信された送信信号及び受信部22により受信された受信信号に基づいて血液流量を算出する流量算出部24Aと、送信信号の振幅に対する受信信号の振幅の減衰度合に基づいて血液濃度を算出する濃度算出部25と、を備える。【選択図】図1
