Surgery – Truss – Pad
Patent
1986-08-18
1989-09-26
Cohen, Lee S.
Surgery
Truss
Pad
128664, 128665, 340753, 340573, A61B 500
Patent
active
048692530
ABSTRACT:
The present invention discloses a method and apparatus for indicating perfusion and oxygen saturation trends in oximetry. In transmittance and reflectance oximetry, LEDs (40, 42) are typically employed to expose tissue to light at two different wavelengths. The light transmitted through, or reflected by, the tissue is received by a detector (38) where signals proportional to the intensity of light are produced. These signals are then processed by oximeter circuitry (14, 16) to determine oxygen saturation, pulse rate, and perfusion. Displays (20) are provided including a display (132, 134) of the change in the oxygen saturation during a specified interval. This display may include first (132) and second (134) trend indication displays that indicate when the oxygen saturation has either been increasing or decreasing at a rate in excess of some predetermined level. Preferably, these displays are triangular, upwardly and downwardly directed light-emitting diodes. A digital display (138) of the change in oxygen saturation may also be provided. A second type of display included provides pulse and perfusion information, with the perfusion being displayed as a logarithmic function of the actual perfusion. This display comprises an aligned array of light-emitting diodes (136) with the number of LED's lit imaging the plethysmigraphic waveform, peak to peak scaling is employed which is indicative of signal level and perfusion.
REFERENCES:
patent: 2706927 (1955-04-01), Wood
patent: 3704706 (1972-12-01), Hertzfeld et al.
patent: 3847483 (1974-11-01), Shaw et al.
patent: 3894533 (1975-07-01), Cannon
patent: 3998550 (1976-12-01), Konishi et al.
patent: 4013067 (1977-03-01), Kresse et al.
patent: 4086915 (1978-05-01), Kofsky et al.
patent: 4109634 (1978-08-01), Bond et al.
patent: 4114604 (1978-09-01), Shaw et al.
patent: 4167331 (1979-09-01), Nielsen
patent: 4222389 (1980-09-01), Rubens
patent: 4266554 (1981-05-01), Hamaguri
patent: 4407290 (1983-10-01), Wilber
patent: 4450843 (1984-05-01), Barney et al.
patent: 4453218 (1984-06-01), Sperinde et al.
patent: 4461301 (1984-07-01), Ochs
patent: 4463762 (1984-08-01), Rubens
patent: 4653498 (1987-03-01), New et al.
patent: 4689615 (1987-08-01), Del Rosso
patent: 4697450 (1987-10-01), Bachman et al.
patent: 4765340 (1988-08-01), Sakai et al.
EPA, 0,194,105, A2, Nichols et al., Sep. 9, 1986.
Wait et al., Intro. to Operational Amplifier Theory, McGraw-Hill, NY, 1975, pp. 50-51.
Craig, Jr. Kenneth C.
Gauglitz Karl F.
Losh G. Michael
Mason Lee R.
Nova Richard C.
Cohen Lee S.
Hanley John C.
Physio-Control Corporation
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