Surgery – Truss – Pad
Patent
1981-03-11
1983-12-06
Howell, Kyle L.
Surgery
Truss
Pad
128672, A61B 502
Patent
active
044187009
ABSTRACT:
The invention relates to a method and apparatus for determining the magnitude of heart-related parameters in a patient. In accordance with the invention, blood volume variation of a peripheral part of the body of a patient, which variation is cyclic in nature, is detected to provide a signal representative of the blood volume. The maximum amplitude, minimum amplitude of the signal at maximum slope, the time interval between the maximum and minimum amplitudes and the instantaneous cyclic repetition rate (period) of the signal are measured, and the parameters are calculated in accordance with appropriate formulae.
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Dimmich, R. F. et al., "Physiologic Monitor System" IBM Tech Disclosure Bulletin, vol. 19, #3, pp. 776-778, Aug. 1976.
Devi, V. et al., "A Processing System for Automatic On-Line Determination of LVET", Conf: Proc of the IFIP-IMIA(TC4) Conf. Rome Italy (6-8 Feb. 1980), pp. 167-173.
Dhupar, K. et al., "A .mu.P-Based VFA", Conf: IEEE 1979 Frontiers of Engrg in Health Care Conf., Denver Co (6-7 Oct. 1979) pp. 145-149.
Howell Kyle L.
Jaworski Francis J.
Sankar Thiagas S.
Warner Sylvia
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