Surgery – Truss – Pad
Patent
1990-08-15
1992-08-25
Jaworski, Francis
Surgery
Truss
Pad
128672, A61B 502
Patent
active
051409917
ABSTRACT:
An apparatus for detecting a pulse wave produced from a subject in synchronous relationship with heartbeats of the subject, including a probe device for sensing a heartbeat synchronous pulse wave transmitted thereto and generating a signal representative of the sensed pulse wave, a sampling device for periodically determining a magnitude of the signal, a determining device for determining a lower peak and a following upper peak of the heartbeat synchronous pulse wave based on variation of the magnitudes determined by the sampling means, a calculating device for calculating a value by subtracting, from each of the magnitudes determined by the sampling means, a magnitude of the signal determined by the sampling means prior by a predetermined number of periods to the each of the magnitudes, and a judging means for judging whether or not the following upper peak is a proper upper peak of a pulse of the heartbeat synchronous pulse wave, based on the values calculated by the calculating means with respect to a portion of the signal between the lower peak and the following upper peak.
REFERENCES:
patent: 4564020 (1986-01-01), Link
patent: 4667680 (1987-05-01), Ellis
patent: 4893631 (1990-01-01), Wenzel et al.
L. A. Geddes, "The Direct and Indirect Measurement of Blood Pressure", 1970, pp. 87-99, Yearbook Medical Publishers.
L. A. Geddes, "Characterization of the Oscillometric Method for Measuring Indirect Blood Pressure", 1982, vol. 10, pp. 271-280, Annals of Biomedical Engineering.
Kenneth Borow, M.D. and Jane Newburger, M.D., "Noninvasive Estimation of Central Aortic Pressure Using the Oscillometric Method for Analyzing Systemic Artery Pulsatile Blood Flow", 1982, pp. 879-886, The C. V. Mosby Co.
Akers Scott R.
Colin Electronics Co., Ltd.
Jaworski Francis
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