Patent ID: 11925443
Assignee: OMRON HEALTHCARE CO., LTD.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A blood pressure monitor comprising:
a pressing member that includes a pressure cuff having a bag shape capable of containing a first fluid and generates a pressing force toward a measurement site of a subject when the pressing member is wound around the measurement site and the pressure cuff is inflated;
a sensing cuff having a bag shape capable of containing a second fluid and provided on a facing surface of the pressing member that faces the measurement site;
an adjuster that adjusts an amount of the first fluid in the pressure cuff and an amount of the second fluid in the sensing cuff;
a pressure sensor that detects pressure in the sensing cuff; and
a controller that controls an operation of the adjuster such that the second fluid is contained in the sensing cuff in an amount corresponding to biometric information about the subject and the pressure cuff is inflated or inflated and deflated in this state when performing a blood pressure measurement, and calculates a blood pressure value of the subject based on an output from the pressure sensor,
wherein the pressure cuff includes two fluid bags each having first and second opposing welded edge portions in a width direction and stacked in a thickness direction, and the fluid bags are provided with through holes such that the first fluid flows from one of the fluid bags through the through holes into the other of the fluid bags, and
wherein the sensing cuff has a single bag structure and includes a first sheet facing the facing surface, and a second sheet positioned between the first sheet and the facing surface, the first sheet and the second sheet are formed to have a bag shape with their circumference edge portions welded to each other, a portion of the sensing cuff excluding the circumference edge portions has a length in a width direction of the sensing cuff smaller than a length of a portion of the pressure cuff excluding the welded edge portions in the width direction, and the sensing cuff in a natural state with one of the first sheet and the second sheet being flat has a slack in the other of the first sheet and the second sheet, the slack extending along a longitudinal direction of the sensing cuff between edges on both ends in the width direction of the sensing cuff; and
a back plate between the pressure cuff and the sensing cuff, the back plate extending lengthwise along a circumference direction of the measurement site, the back plate having a width spanning only the portion of the pressure cuff excluding the first and second welded edge portions and the width of the back plate being wider than a width of the sensing cuff.