PROBLEM TO BE SOLVED: To provide a blood purification device capable of detecting positive pressure in a blood circuit without providing new sensors separately.SOLUTION: A blood purification device includes a blood circuit capable of extracorporeally circulating a patient blood from the tip of an artery side blood circuit 1 to the tip of a vein side blood circuit 2, a dialyzer 3 for purifying the blood that flows through the blood circuit, and air bubble detection means 7 including holding means H capable of holding a part of the blood circuit, an ultrasonic vibration element A3 capable of oscillating an ultrasonic wave to a flow channel held by the holding means H, and an ultrasonic wave receiving element A4 capable of receiving the ultrasonic wave oscillated from the ultrasonic vibration element A3 that transmits the flow channel, which can detect air bubbles in the liquid flowing through the flow channel based on the ultrasonic wave received by the ultrasonic wave receiving element A4. The air bubble detection means 7 can detect positive pressure of the flow channel held by the holding means H according to the ultrasonic wave receiving by the ultrasonic wave receiving element A4.COPYRIGHT: (C)2016,JPO&INPIT【課題】別途新たにセンサ類を設けることなく血液回路における陽圧を検出することができる血液浄化装置を提供する。【解決手段】動脈側血液回路1の先端から静脈側血液回路2の先端まで患者の血液を体外循環させ得る血液回路と、血液回路を流れる血液を浄化するダイアライザ3と、血液回路の一部を挟持し得る挟持手段H、該挟持手段Hで挟持した流路に超音波を発振可能な超音波振動素子A3、及び超音波振動素子A3から発振されて流路を透過した超音波を受信可能な超音波受信素子A4を有するとともに、当該超音波受信素子A4で受信した超音波に基づいて流路を流れる液体中の気泡を検出し得る気泡検出手段7とを具備した血液浄化装置において、気泡検出手段7は、超音波受信素子A4で受信した超音波に応じて挟持手段Hで挟持した流路の陽圧を検出可能とされたものである。【選択図】図1
