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Open Access Crossmatching Maternal and Fetal Blood in Sheep

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We investigated the incidence of ex vivo incompatibility between ovine maternal RBC and fetal plasma. Time-mated singleton pregnant ewes (n = 8) underwent cesarean delivery of the fetus; at the time of delivery, paired maternal and fetal blood samples were collected and subsequently separated for storage as packed RBC and fresh frozen plasma. Gel column crossmatching was performed 3 to 4 wk later. All fetus–dam crossmatches were considered major crossmatches, combining fetal (recipient) plasma with dam (donor) RBC. The plasma of 8 fetuses was cross-matched with RBC from 5 dams; all autologous controls were negative, and all but one crossmatch (1 of 40, 2.5%) were considered compatible. In addition, the plasma of 3 dams was crossmatched with RBC from 5 dams; all autologous controls were negative; however, significant incompatibility was noted. In total, 4 of 13 (30.8%) dam–dam crossmatches were considered incompatible. The results of this initial study suggest that when a single animal receives multiple blood-product transfusions, the risk of an immunologic transfusion reaction can be reduced by ensuring that the blood products are obtained from a single donor, performing a crossmatch prior to transfusion, and the use of synthetic products to increase the oxygen carrying capacity of fetal blood.
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Document Type: Research Article

Affiliations: 1: Animal Care Services, University of Western Australia, Crawley, Western Australia;, Email: [email protected] 2: School of Veterinary and Life Sciences, Murdoch University, Murdoch, Western Australia 3: Division of Obstetrics and Gynaecology, University of Western Australia, Crawley, Western Australia

Publication date: August 1, 2018

This article was made available online on July 23, 2018 as a Fast Track article with title: "Crossmatching Maternal and Fetal Blood in Sheep".

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  • Comparative Medicine (CM), an international journal of comparative and experimental medicine, is the leading English-language publication in the field and is ranked by the Science Citation Index in the upper third of all scientific journals. The mission of CM is to disseminate high-quality, peer-reviewed information that expands biomedical knowledge and promotes human and animal health through the study of laboratory animal disease, animal models of disease, and basic biologic mechanisms related to disease in people and animals.

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