Patent ID: 8147418

Claim:
Blood pressure measuring cuffs which measures blood pressure using an inner cuff which is adapted to be inserted in to the acoustic canal and an outer cuff which is adapted to be placed on the outer surface of the tragus, wherein said inner cuff and outer cuff are comprised of: a cuff member connected to a duct, and a cuff bladder fixed onto said cuff member in an air-tight manner and has a body which can expand and contract, wherein a lid of said cuff bladder has a pressing surface formed in a shape of either a protrusion or a collapsed protrusion, and wherein said lid is circular, the diameter of said cuff bladder is within a range of 5 to 10 mm, the diameter of said pressing surface is within a range of 3 to 6 mm, the thickness of said pressing surface is within a range of 0.4 to 1 mm, and the thickness of said body is within a range of 0.1 to 0.8 mm.