| PATENT ASSIGNEE'S COUNTRY | CH |
| UPDATE | 08.00 |
| PATENT ASSIGNEE | AVL Medical Instruments AG |
| PATENT CLAIMS |
Measuring apparatus for optically determining the total hemo globin concn (tHb) in non-hemolyzed whole blood, comprising - Capillary channel for holding a blood sample, having an inner wall & an inner diameter - An excitation device for supplying at least first & second measurement wavelengths, defining a first optical axis directed towards said capillary channel & an excitation light cone defined by an opening angle alpha - A detection device, defining a second optical axis directed towards said capillary channel & a detection light cone defined by an acceptance angle Wherein inclination angles beta1, beta2 of said first & second optical axes & distance "e" of said axes at intersection points with said capillary channel are chosen with respect to said diameter of said capillary channel such that said excitation light cone & said detection cone light overlap on said inner wall of said capillary channel if said capillary channel is filled with an aq soln, & that they do not overlap if said capillary channel is filled with whole blood, on account of reduced mean penetration depth of first & second measurement wavelengths |
| PATENT PHOTOCOPY | Available on request |
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