2 results about "Blood coagulation time" patented technology

A blood coagulation time shortening agent for a blood specimen deficient in coagulation factor XII, in activated partial thromboplastin time measurement includes, as an active ingredient, a polymer having 2-methacryloyloxyethyl phosphorylcholine as a constitutional unit.

To estimate a cause of extension of coagulation time of the blood of a specimen to be inspected.SOLUTION: A method for estimating a cause of extension of blood coagulation time includes: acquiring a coagulation waveform indicating a change with time of a light amount due to a coagulation reaction of reaction liquid obtained by mixing a specimen to be inspected and an agent (S301b); acquiring a first waveform through before-and-after difference processing on the coagulation waveform (S302b); acquiring first and second fitting waveforms through fitting processing on the coagulation waveform and the first waveform (S303b, S304b); acquiring a third waveform through the before-and-after difference processing on the second fitting waveform (S305b); acquiring first to third normalized waveforms by normalizing light amount axes and time axes of the first and second fitting waveforms and the third waveform (S306b); extracting a feature quantity from each of the first to third normalized waveforms (S307b); and estimating the cause of extension of the coagulation time of the blood of the specimen to be inspected on the basis of a known feature quantity and the extracted feature quantity.SELECTED DRAWING: Figure 3B