Sphygmomanometer, blood pressure measurement method, and device

A blood pressure measurement method for measuring a blood pressure at a measurement target site, including:

• a main body mounted with a pump;
• a belt that extends from the main body and is to be attached around a measurement target site;
• and
• a cuff structure having a band shape, and that is disposed facing an inner circumferential surface of the belt and has one end attached to the main body in a freely separable manner from the inner circumferential surface of the belt,
• wherein the cuff structure includes
• a bag-shaped pressure cuff that extends along a circumferential direction of the measurement target site so as to receive a supply of pressurization fluid to press the measurement target site,
• a sensing cuff that is configured in a bag shape so as to be capable of containing pressure transmission fluid, is disposed along an inner circumferential surface of the pressure cuff, and extends in the circumferential direction across an artery passing portion of the measurement target site, and
• a back plate that is inserted between the pressure cuff and the sensing cuff, extends along the circumferential direction of the measurement target site, and transmits a pressing force from the pressure cuff to the sensing cuff,
• the blood pressure measurement method comprising:
• performing control of supplying the pressurization fluid from the pump to the pressure cuff to press the measurement target site, and
• calculating a blood pressure based on a pressure of the pressure transmission fluid contained in the sensing cuff.

A device comprising a main body mounted with blood pressure measurement elements,

• wherein the blood pressure measurement elements include
• a pump mounted to the main body,
• a belt that extends from the main body and is to be attached around a measurement target site, and
• a cuff structure having a band shape, and that is disposed facing an inner circumferential surface of the belt and has one end attached to the main body in a freely separable manner from the inner circumferential surface of the belt,
• the cuff structure includes
• a bag-shaped pressure cuff that extends along a circumferential direction of the measurement target site so as to receive a supply of pressurization fluid to press the measurement target site,
• a sensing cuff that is configured in a bag shape so as to be capable of containing pressure transmission fluid, is disposed along an inner circumferential surface of the pressure cuff, and extends in the circumferential direction across an artery passing portion of the measurement target site, and
• a back plate that is inserted between the pressure cuff and the sensing cuff, extends along the circumferential direction of the measurement target site, and transmits a pressing force from the pressure cuff to the sensing cuff, and
• the device includes
• a pressurization control unit that performs control of supplying the pressurization fluid from the pump to the pressure cuff to press the measurement target site, and
• a blood pressure calculation unit that calculates a blood pressure based on a pressure of the pressure transmission fluid contained in the sensing cuff.