Device and method for measuring prothrombin time and hematocrit by analyzing change in reactance in a sample
First Claim
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1. A diagnostic device for measuring hematocrit (HCT) or prothrombin time (PT) of a sample, comprising:
- a sensor device; and
a test card assembly including one or more pairs of electrodes,wherein the sensor device comprisesa test card receiving unit for accommodating the test card assembly;
a power source for providing an AC test signal at a constant frequency to electrodes of the test card assembly;
a signal retrieving unit coupled to the test card assembly;
a microprocessor in the sensor device programmed for (i) performing a reactance analysis of a sample provided on the test card assembly by comparing the AC test signal and a response signal from the test card assembly in response to the AC test signal, calculating a change in phase of the AC test signal, and calculating a reactance from the change in phase of the AC test signal, and (ii) determining PT or HCT of the sample; and
,a display for displaying the PT or HCT of the sample.
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Abstract
Devices and methods for measuring prothrombin time (PT) and hematocrit (HCT) by analyzing the change in reactance in a sample are presented. A diagnostic device for measuring HCT and PT of a fluid includes a relative electrode-type sensor device and a blood test card assembly including one or more pairs of electrodes, wherein alternating current (AC) provided by the sensor device is used to measure and calculate HCT and PT of blood test using the reactance analysis.
14 Citations
8 Claims
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1. A diagnostic device for measuring hematocrit (HCT) or prothrombin time (PT) of a sample, comprising:
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a sensor device; and a test card assembly including one or more pairs of electrodes, wherein the sensor device comprises a test card receiving unit for accommodating the test card assembly; a power source for providing an AC test signal at a constant frequency to electrodes of the test card assembly; a signal retrieving unit coupled to the test card assembly; a microprocessor in the sensor device programmed for (i) performing a reactance analysis of a sample provided on the test card assembly by comparing the AC test signal and a response signal from the test card assembly in response to the AC test signal, calculating a change in phase of the AC test signal, and calculating a reactance from the change in phase of the AC test signal, and (ii) determining PT or HCT of the sample; and
,a display for displaying the PT or HCT of the sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification