Patent ID: 6106478
Filing Date: 2000-08-22
Classification: A61B

Abstract:
A sphygmomanometer comprising:an inflatable cuff which is attached to a selected portion of a patient for applying pressure to an artery when inflated;an optical range sensor which is located on opposite sides of said cuff for generating photoelectric volumetric pulse wave signals correlating to the pulsation displacement of said cuff caused by said artery;a digital processing means for determining a maximum and minimum blood pressure of said patient solely on the basis of said photoelectric volumetric pulse wave signals generated by said optical range sensor; anda display section for displaying the maximum and minimum blood pressure values determined by said digital data processing section,wherein when raising or lowering an inflation pressure inside the cuff at a constant speed, said digital data processing section determines said maximum blood pressure by determining a point of disappearance or appearance of said photoelectric volumetric pulse wave signals, and determines said minimum blood pressure by determining a point at which said photoelectric volumetric pulse wave signals rapidly decrease.