Oscillometric type electronic sphygmomanometer

Details Oscillometric type electronic sphygmomanometer Oscillometric type electronic sphygmomanometer

1998-07-13

1999-10-26

Nasser, Robert L.

Surgery

Diagnostic testing

Cardiovascular

600493, 600494, 600495, A61B 500

Patent

active

059719320

ABSTRACT:
An oscillometric type electronic sphygmomanometer for determining the systolic and the diastolic blood pressure on the basis of a peak formed by the variance in the pulse wave amplitude, wherein the systolic and the diastolic blood pressure are provisionally determined on the basis of the curve of the varying pulse wave amplitude which forms the first peak, when the provisionally determined diastolic blood pressure is higher than a preset value, the pulse wave amplitude continues to be detected and monitored until the cuff pressure decreases below the provisionally determined diastolic blood pressure by a predetermined pressure, and when the pulse wave amplitude detected while being monitored is equal to or higher than the said maximum pulse wave amplitude value, the pulse wave amplitude continues to be further detected so as for a new maximum pulse wave amplitude to be obtained, thereby determining at least the diastolic blood pressure on the basis of the curve of the varying pulse wave amplitude, which has the maximum pulse wave amplitude value and forms the second peak. As a result of such a configuration, it will become possible to avoid an erroneous measurement of the blood pressure caused by disordered breathing and physical movement of the testee when his/her the blood pressure is measured.

REFERENCES:
patent: 4703760 (1987-11-01), Miyawaki et al.
patent: 4922918 (1990-05-01), Ruiter
patent: 5385149 (1995-01-01), Chang et al.
patent: 5542428 (1996-08-01), Jayne
patent: 5551440 (1996-09-01), Miyawaki
patent: 5759157 (1998-06-01), Harada et al.

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