Method and apparatus
AssigneeOptoQ AB
InventorsLars-Göran Lindberg, Gunnar Enlund, Magnus Vegfors
Life of this patent
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Abstract
The present invention relates to a method for detecting blood characteristics including hemoglobin in a fluid medium using both transmission and reflection of a light beam which forms a quotient.
Claims20
A non-invasive method for the quantitative measurement of haemoglobin concentration in relation to total blood volume in a mixture of liquid and blood cells contained in a light pervious vessel, which comprises
- directing light of at least one wavelength against the vessel;
- detecting the intensity of the light transmitted through the vessel;
- detecting the intensity of light reflected from the vessel;
- calculating a quotient of said intensity of transmitted light amd reflected light;
- and
- analysing said quotient to determine the haemoglobin concentration.
An apparatus for the quantitative measurement of haemoglobin concentration in relation to total blood volume in a mixture of liquid and blood cells contained in a light pervious vessel, said apparatus comprising
- at least one light source for directing light of at least one, wavelength against said vessel;
- a first detector for detecting the intensity of the light transmitted through said vessel;
- a second detector for detecting the intensity of light reflected from said vessel;
- processor for calculating a quotient of said intensity of transmitted light and reflected light;
- and
- means for analysing said quotient to determine the haemoglobin concentration.
Dependencies are inferred from the claim text.