Period and frequency measurement device with correction device a

Details Period and frequency measurement device with correction device a Period and frequency measurement device with correction device a

1996-02-16

1998-06-02

Kamm, William E.

Surgery

Diagnostic testing

Cardiovascular

600503, A61B 50205

Patent

active

057591563

ABSTRACT:
A period and frequency measurement device is provided having a sensor for measuring pulse waves and body movements. A window determination circuit sets a reference value in accordance with previously measured pulse waves and body movements and determines whether currently measured pulse waves and body movements is within a window defined by upper and lower margins relative to the reference value. A window correction circuit corrects the window to be used for a next pulse waves and body movement measurement by applying a specified correction to the current pulse waves and body movements measurement if a determination result of the window determination circuit indicates that the current pulse waves and body movements measurement is outside a current window.

REFERENCES:
patent: 4202350 (1980-05-01), Walton
patent: 4224948 (1980-09-01), Cramer et al.
patent: 4407295 (1983-10-01), Steuer et al.
patent: 5337753 (1994-08-01), Lekhtman
patent: 5511554 (1996-04-01), Helfenbein et al.
patent: 5515858 (1996-05-01), Myllymaki
patent: 5626140 (1997-05-01), Feldman et al.

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