Photothermal incubation of red blood cells by laser for rapid pre-transfusion blood group typing

Clare A. Manderson, Heather McLiesh, Rodrigo Curvello, Rico F. Tabor, Jim Manolios, Gil Garnier

Research output: Contribution to journalArticleResearchpeer-review

1 Citation (Scopus)

Abstract

Safe blood transfusion requires compatibility testing of donor and recipient to prevent potentially fatal transfusion reactions. Detection of immunoglobulin G (IgG) antibodies requires incubation at 37 °C, often for up to 15 minutes. Current incubation technology predominantly relies on slow thermal-gradient dependent conduction. Here, we present rapid optical heating via laser, where targeted illumination of a blood-antibody sample in a diagnostic gel card is converted into heat, via photothermal absorption. Our laser-incubator heats the 75 µL blood-antibody sample to 37 °C in under 30 seconds. We show that red blood cells act as photothermal agents under near-infrared laser incubation, triggering rapid antigen-antibody binding. We detect no significant damage to the cells or antibodies for laser incubations of up to fifteen minutes. We demonstrate laser-incubated immunohaematological testing to be both faster and more sensitive than current best practice - with clearly positive results seen from laser incubations of just 40 seconds.

Original languageEnglish
Number of pages10
JournalScientific Reports
Volume9
Issue number1
DOIs
Publication statusPublished - 2 Aug 2019

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