Crossmatch Compatibility Testing

This topic delves into the critical pre-transfusion procedure of crossmatching, which ensures compatibility between a patient and donor blood unit. Zambian tertiary students will learn the differences between a short (immediate spin) crossmatch and a complete (antiglobulin phase) crossmatch, and the modern 'Type and Screen' strategy. The module provides step-by-step procedures for performing crossmatches using saline and BSA techniques, including the use of Coombs Control Cells. It covers the interpretation of results, grading of agglutination reactions, and troubleshooting positive crossmatches. This hands-on knowledge is fundamental for students in medical laboratory science, as the crossmatch is the final safety check before blood issuance. Proficiency in this area is essential for preventing acute hemolytic transfusion reactions, a leading cause of transfusion-related mortality. Understanding compatibility testing is a core competency evaluated in practical examinations and is indispensable for employment in any hospital blood bank or transfusion service in Zambia.