Hoffmann-La Roche Inc.

Kurt Schildknecht

Claude Borer

Method for measuring the coagulation time of a blood sample in which a sample-reagent mixture is formed by introducing the sample and at least one reagent into a cuvette. To reduce the operating and material costs, the sample-reagent mixture is so moved in a stationary cuvette that the mixture flows back and forth around an edge projecting into the cuvette, whereby a clot forms on this edge.

Method for measuring blood coagulation time

Method and apparatus for measuring blood coagulation time

A method for the photometric analysis of a liquid sample in which different path lengths of the sample are analyzed photometrically. In order to reduce the time needed for analyzing a large number of samples, the analysis is carried out with a light beam which is generated by an immobile light source; the sample is introduced into a cuvette which has at least two regions with different cross-section lengths; and the cuvette is continuously moved along a circular path in such a manner that in the course of the photometric measurement the light beam passes through at least two of the regions in succession.

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Rotkreuz, Switzerland

Kurt Schildknecht