Apparatus for measurement of blood bilirubin concentration

Details Apparatus for measurement of blood bilirubin concentration Apparatus for measurement of blood bilirubin concentration

G - Physics

01

N

73/59

G01N 21/27 (2006.01) G01N 21/31 (2006.01) G01N 33/72 (2006.01)

Patent

CA 1139124

Abstract of the Disclosure Electro-optical system to test for bilirubin presence and concentration in blood samples. An optical system for transilluminating the blood sample with a beam divider to create parallel optical paths after transmission through the sample. A different band pass filter in each of the parallel paths provides transmitted light at two specific wavelengths such that the effect of hemoglobin, in the sample, on the compared light intensities along the parallel paths is eliminated. A gradient density filter in one path is movable, in response to an imbalance, to a position at which intensities of light transmitted along the parallel paths are equal. The filter position is correlated to a reading of bilirubin concentration. An automated sample handling system receives samples, moves them into operative position in the optical system and signals the optical system to function, and returns the sample for removal.

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