Surgery – Truss – Pad
Patent
1991-12-02
1994-02-08
Shay, David M.
Surgery
Truss
Pad
128664, 128665, 128898, A61B 600
Patent
active
052841375
ABSTRACT:
The invention relates specifically to a process for the determination of local dye concentrations in animal and human tissues. Light from two different wavelength regions (I, II), one of which (I) has a window for hemoglobin, is irradiated into a subregion of the tissue and the diffuse reflectance (MIO, MIIO) determined. Then, in another step, by means of the diffuse reflectance in the first wavelength region and at least one tissue-type-specific standard basic diffuse reflectance curve obtained in advance for both wavelength regions a tissue-person-specific standard basic diffuse reflectance curve (SIIO) for the second wavelength region (II) is determined, and by means of the determined tissue-person-specific standard basic diffusereflectance curve (SIIO) and the measured diffuse reflectance (MIIO) in the second wavelength region (II) a value for the hemoglobin concentration (KHb1) is obtained.
REFERENCES:
patent: 3830568 (1974-08-01), Allen
patent: 4178917 (1979-12-01), Shapiro
patent: 4651741 (1987-03-01), Passafaro
patent: 4718417 (1988-01-01), Kittrell et al.
patent: 4801205 (1989-01-01), Tatsuno
"Continuous, Non-Invasive Measurements of Arterial Blood Oxygen Levels" by Merrick et al; Hewlett-Packard J.; vol. 28, No. 2 Oct. 1976 pp. 2-10.
Frank Klaus
Kessler Manfred
Rainey Matthew C.
Shay David M.
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