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  • Title: A micro-rheological method for determination of blood type.
    Author: Makulska S, Jakiela S, Garstecki P.
    Journal: Lab Chip; 2013 Jul 21; 13(14):2796-801. PubMed ID: 23669864.
    Abstract:
    The measurement of time and distance can be used for determining agglutination in small (nL) samples of liquid. We demonstrate the use of this new scheme of detection in typing and subtyping blood in a simple microfluidic system that monitors the speed of flow of microdroplets. The system (i) accepts small samples of liquids deposited directly onto the chip, (ii) forms droplets on demand from these samples, (iii) merges the droplets, and (iv) measures their speed in a microchannel. A sequence of measurements on different combinations of blood and antibodies can thus be used to determine blood type with the estimated probability of mistyping being less than 1 in a million tests. In addition, in the agglutinated samples, red blood cells concentrate at the rear of the droplets yielding an additional vista for detection and suggesting a possible mechanism for separations.
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