Problem to be solved: to provide an ultrasonic measuring apparatus which can be used in an extracorporeal circulation device and can measure a flow rate and a bubble of a liquid flowing through a blood circuit.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 a flow rate and a bubble of a liquid flowing through the blood circuit 110, and a measuring circuit 20A is a transmitting portion 21 of the transmitter A receiver 22, a transmission signal transmitted by the transmitting unit 21 and a flow rate calculating part 24a for calculating a flow rate based on a received signal received by the receiver 22, and a bubble based on received intensity of the received signalA bubble detecting section 25 is provided.Diagram【課題】体外循環装置に用いられ、血液回路を流れる液体の流量及び気泡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、血液回路110を流れる液体の流量及び気泡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流量を算出する流量算出部24Aと、受信信号の受信強度に基づいて気泡を検出する気泡検出部25と、を備える。【選択図】図1
