Initiation of an analytical measurement in blood

Details Initiation of an analytical measurement in blood Initiation of an analytical measurement in blood

1999-07-16

2000-07-04

Font, Frank G.

Optics: measuring and testing

Blood analysis

436 8, 436 52, 436 63, 356246, 356427, G01N 3348, G01N 3386, G01N 2103

Patent

active

060846607

ABSTRACT:
A distinctive optical signature permits a fluidic medical diagnostic device to measure an analyte concentration or a property of whole blood, particularly the coagulation time, only after first insuring that a whole blood sample has been introduced into the device. A suitable device has at one end a sample port for introducing a sample and at the other end a bladder for drawing the sample to a measurement area. By requiring a meter, used in conjunction with the device, to first detect the distinctive optical signature, a sample is drawn to the measurement area only if it is whole blood. In that case, a channel carries the sample from the sample port to the measurement area, and a stop junction, between the measurement area and bladder, halts the sample flow. The meter measures a physical property of the blood sample--typically, optical transmittance--after it has interacted with a reagent in the measurement area.

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