Electronic sphygmomanometer and method of controlling operation

Details Electronic sphygmomanometer and method of controlling operation Electronic sphygmomanometer and method of controlling operation

1995-06-21

1996-06-04

Sykes, Angela D.

Surgery

Truss

Pad

128681, A61B 50225

Patent

active

055223958

ABSTRACT:
The amplitude of a pulse wave that appears in a form superimposed upon cuff pressure is detected every beat of a heartbeat in synchronism with the beat not only in the course of depressurization but also in the course of pressurization. The maximum value Amaxi of the pulse-wave amplitude in the course of pressurization is multiplied by a prescribed coefficient to decide a threshold value TH. The threshold value TH is calculated as a value equivalent to a pulse-wave amplitude corresponding to systolic pressure that would be determined in the course of depressurization. After the cuff is pressurized to the target pressure, a transition is made to the depressurizing process. It is judged that cuff pressurization is inadequate if the initial pulse-wave amplitude in the course of depressurization is greater than the threshold value TH. Thus, whether or not cuff pressurization is inadequate can be judged appropriately at all times without any influence due to personal differences or physical condition.

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patent: 5335665 (1994-08-01), Suzuki

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