Surgery – Truss – Pad
Patent
1980-09-22
1982-07-13
Howell, Kyle L.
Surgery
Truss
Pad
128782, A61B 502
Patent
active
043389503
ABSTRACT:
An improved system and method for sensing and measuring heart beat. A body-mountable instrument is provided having a first sensor for detecting pulsing of a user's blood resulting from the user's heart beat and body movement and generating a first electrical signal indicative thereof and a second sensor for detecting the user's body movement and generating a second electrical signal indicative thereof. The instrument further includes a processor responsive to the first and second electrical signals for determining the period of the second electrical signal and for subtracting a first portion of the first electrical signal occurring during a first time interval from a corresponding portion of the first electrical signal occurring during a second time interval. The second time interval is separated from the first time interval by a time period nt, where n is an integer and t is the period of the second electrical signal, so that the body movement component is removed from the first electrical signal, yielding the true heart beat signal.
REFERENCES:
patent: 4157708 (1979-06-01), Inura
patent: 4202350 (1980-05-01), Walton
patent: 4211237 (1980-07-01), Nagel
patent: 4258719 (1981-03-01), Lewyn
patent: 4280506 (1981-07-01), Zurcher
Barlow, Jr. Carl A.
Reid Lee R.
Heiting Leo N.
Howell Kyle L.
Jaworski Francis J.
Marshall, Jr. Robert D.
Sharp Melvin
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