Sphygmomanometer, blood pressure measurement method, and device

A blood pressure measurement method for measuring a blood pressure of a wrist using a sphygmomanometer, the sphygmomanometer including:

• a main body that is mounted with a pump and is to be disposed on a dorsal surface of a wrist as a measurement target site, and
• a cuff that extends along a circumferential direction of the wrist from an ulnar side end portion of the main body to a palmar surface and is to be attached around the wrist,
• wherein the cuff includes
• a belt that extends from the main body and is to be attached around the wrist, and
• a cuff structure that has a band shape and a set length, and that is disposed facing an inner circumferential surface of the belt and has one end attached to an ulnar side end portion of the main body, and
• when the cuff structure is attached to a wrist having a preset maximum wrist circumference, other end of the cuff structure on a side opposite to the one end terminates within a range between an angle of a radial artery viewed from a center of the wrist and an angle of a boundary line on a radial side between the dorsal surface and the palmar surface, with respect to a circumferential direction of the wrist having the maximum wrist circumference, and
• the blood pressure measurement method comprises:
• performing control of supplying a fluid from the pump to the cuff structure to press the wrist;
• and
• calculating a blood pressure based on a pressure of a fluid contained in the cuff structure.

A device comprising a main body that is mounted with blood pressure measurement elements and is to be disposed on a dorsal surface of a wrist as a measurement target site,

• wherein the blood pressure measurement elements include
• a pump mounted to the main body, and
• a cuff that extends along a circumferential direction of the wrist from an ulnar side end portion of the main body to a palmar surface and is to be attached around the wrist,
• wherein the cuff includes
• a belt that extends from the main body and is to be attached around the wrist, and
• a cuff structure that has a band shape and a set length, and that is disposed facing an inner circumferential surface of the belt and has one end attached to an ulnar side end portion of the main body,
• the device includes
• a pressurization control unit that performs control of supplying a fluid from the pump to the cuff structure to press the wrist, and
• a blood pressure calculation unit that calculates a blood pressure based on a pressure of a fluid contained in the cuff structure;
• and
• when the cuff structure is attached to a wrist having a preset maximum wrist circumference, other end of the cuff structure on a side opposite to the one end terminates within a range between an angle of a radial artery viewed from a center of the wrist and an angle of a boundary line on a radial side between the dorsal surface and the palmar surface, with respect to a circumferential direction of the wrist having the maximum wrist circumference.