Surgery – Truss – Pad
Patent
1983-09-12
1986-09-02
Doll, John
Surgery
Truss
Pad
128666, 128691, A61B 502
Patent
active
046089900
ABSTRACT:
A fluorometer and method of fluorometry for illuminating an area containing fluorescent material which material fluoresces when excited with light energy at first particular frequencies and for collecting and measuring fluorescent light energy at second particular frequencies produced at the area, including, a light source for producing light energy including light energy at the first particular frequencies and with the light source having a wattage rating of no more than twenty (20) watts, pulsing the light energy at a frequency of approximately at least 10 Hz, filtering the pulsing light energy from the light source to pass substantially only the light energy at the first particular frequencies, directing the filtered pulsing light energy to the area containing fluorescent material, collecting light energy including fluorescent light energy at the second particular frequencies produced at the area and directing the collected light energy away from the area, filtering the collected light energy to pass substantially only the collected light energy at the second particular frequencies, detecting the filtered collected light energy for producing a first signal in accordance with the filtered collected light energy, and phase detecting the first signal for producing a second signal in accordance with the first signal and representative of the filtered collected light energy in phase with the filtered pulsing light energy which second signal is representative of the fluorescent light energy at the second particular frequencies produced at the area.
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Jacobs et al., "Determination of the Accuracies of Dye-Dilution and Electromagnetic Flowmeter Methods of Measuring Blood Flow" J. of Thoracic and Cardiovascular Surgery, v.58, No. 4, Oct. 1969, pp. 601-607.
Doll John
Johnson Lance
Roston Ellsworth R.
Schwartz Charles H.
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