Method and apparatus for detecting optical pulses

Details Method and apparatus for detecting optical pulses Method and apparatus for detecting optical pulses

1989-04-05

1990-06-19

Sykes, Angela D.

Surgery

Truss

Pad

128666, 128687, A61B 502

Patent

active

049343726

ABSTRACT:
A method and apparatus for improving the calculation of oxygen saturation and other blood constituents by non-invasive pulse oximeters. The method and apparatus permit more accurate determination of blood flow by collecting time-measures of the absorption signal at two or more wavelengths and processing the collected time-measure to obtain composite pulsatile flow data from which artifacts have been filtered. The processing may occur in the time domain or in the frequency domain. In the preferred time domain embodiment, successive portions of periodic information are weighted and added together in synchrony to obtain the composite pulse information. In the preferred frequency domain embodiment, the time-measure in Fourier transformed into its spectral components to form the composite information. A new method and apparatus for correlating the heartbeat and optical pulse is provided whereby a product of the ECG R-wave and optical pulse signals corresponding to the same heartbeat is obtained, and one signal is time shifted relative to the other until a maximum waveform product corresponding to the heartbeat is determined.

REFERENCES:
patent: Re27042 (1971-01-01), Jorgensen et al.
patent: 2827040 (1958-03-01), Gilford
patent: 2933081 (1960-04-01), Passannante
patent: 3315303 (1967-05-01), Hammacher
patent: 3412729 (1968-11-01), Smith, Jr.
patent: 3520295 (1970-07-01), Kelly
patent: 3590811 (1971-07-01), Harris
patent: 3608545 (1971-09-01), Novack et al.
patent: 3618592 (1971-11-01), Stewart
patent: 3651806 (1972-03-01), Hirshberg
patent: 3658060 (1972-04-01), Eklof
patent: 3704706 (1972-12-01), Herczfeld et al.
patent: 3734086 (1973-05-01), Phelps, Sr.
patent: 3742938 (1973-07-01), Stern
patent: 3773033 (1973-11-01), Rodbard et al.
patent: 3948248 (1976-04-01), Zuckerman et al.
patent: 3994284 (1976-11-01), Voelker
patent: 3994285 (1976-11-01), Doll
patent: 3998550 (1976-12-01), Konishi et al.
patent: 4000461 (1976-12-01), Barber et al.
patent: 4023563 (1977-05-01), Reynolds et al.
patent: 4023564 (1977-05-01), Valiguette et al.
patent: 4030485 (1977-06-01), Warner
patent: 4036211 (1977-07-01), Veth et al.
patent: 4053911 (1977-10-01), Hudspeth et al.
patent: 4063551 (1977-12-01), Sweeney
patent: 4086915 (1978-05-01), Kofsky
patent: 4154230 (1979-05-01), Lee
patent: 4181134 (1980-01-01), Mason et al.
patent: 4216779 (1980-08-01), Squires et al.
patent: 4266554 (1981-05-01), Hamaguri
patent: 4325384 (1982-04-01), Blaser et al.
patent: 4353998 (1982-10-01), Sawa
patent: 4402325 (1983-06-01), Sawa
patent: 4406658 (1983-09-01), Lattin et al.
patent: 4407290 (1983-10-01), Wilber
patent: 4422458 (1983-12-01), Kravath
patent: 4425921 (1984-01-01), Fujisaki et al.
patent: 4425922 (1984-01-01), Conti et al.
patent: 4440176 (1984-04-01), Miodownik
patent: 4446868 (1984-05-01), Aronson
patent: 4446871 (1984-05-01), Imura
patent: 4450838 (1984-05-01), Miodownik
patent: 4545387 (1985-10-01), Balione
patent: 4573478 (1986-03-01), Arnold et al.
patent: 4577639 (1986-03-01), Simon et al.
patent: 4586513 (1986-06-01), Hamaguri
patent: 4589420 (1986-05-01), Adams et al.
patent: 4617937 (1986-10-01), Peel et al.
patent: 4653498 (1987-03-01), New, Jr. et al.
patent: 4802486 (1989-02-01), Goodman et al.
patent: 4824242 (1989-04-01), Frick et al.
Schotz et al., "The Ear Oximeter as a Circulating Monitor," Anesthesiology, vol. 19, p. 386, (1958).
Cohen et al., "Self-Balancing System for Medical and Physiological Instrumentation," IEEE Trans. Bio-Med. Eng., vol. BME-18, p. 66, (1971).
Goodlin, "Interpartum Fetal Heart Rate Responses and Plethysmographic Pulse", Amer. J. Obstet. Gynec., vol. 110, p. 210, (1971).
Goodlin et al., "Systolic Time Intervals in the Fetus and Neonate" Obstetrics and Gynecology, vol. 34, p. 295, (Feb. 1972).
Goodlin, Care for the Fetus, p. 101, (Masson 1979).

Affiliated with

Also associated with

Rating

Method and apparatus for detecting optical pulses does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for detecting optical pulses, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for detecting optical pulses will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2253515