alexa A novel paper-based assay for the simultaneous determination of Rh typing and forward and reverse ABO blood groups.
Haematology

Haematology

Journal of Blood Disorders & Transfusion

Author(s): Noiphung J, Talalak K, Hongwarittorrn I, Pupinyo N, Thirabowonkitphithan P, , Noiphung J, Talalak K, Hongwarittorrn I, Pupinyo N, Thirabowonkitphithan P,

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Abstract We propose a new, paper-based analytical device (PAD) for blood typing that allows for the simultaneous determination of ABO and Rh blood groups on the same device. The device was successfully fabricated by using a combination of wax printing and wax dipping methods. A 1:2 blood dilution was used for forward grouping, whereas whole blood could be used for reverse grouping. A 30\% cell suspension of A-cells or B-cells was used for haemagglutination on the reverse grouping side. The total assay time was 10 min. The ratio between the distance of red blood cell movement and plasma separation is the criterion for agglutination and indicates the presence of the corresponding antigen or antibody. The proposed PAD has excellent reproducibility in that the same blood groups, namely A, AB, and O, were reported by using different PADs that were fabricated on the same day (n=10). The accuracy for detecting blood group A (n=12), B (n=13), AB (n=9), O (n=14), and Rh (n=48) typing were 92\%, 85\%, 89\%, 93\%, and 96\%, respectively, in comparison with the conventional slide test method. The haematocrit of the sample affects the accuracy of the results, and appropriate dilution is suggested before typing. In conclusion, this study proposes a novel method that is straightforward, time-saving, and inexpensive for the simultaneous determination of ABO and Rh blood groups, which is promising for use in developing countries. Copyright © 2015 Elsevier B.V. All rights reserved. This article was published in Biosens Bioelectron and referenced in Journal of Blood Disorders & Transfusion

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