What is the purpose of using a pre-warm technique in the crossmatching procedure for patients with a history of hemolysis?

A To enhance the detection of warm antibodies
B To reduce the risk of transfusion-related acute lung injury
C To improve the viability of red blood cells during storage
D To prevent the activation of complement proteins
The pre-warm technique is used to enhance the detection of warm antibodies, which are responsible for hemolysis in some patients.
AABB Technical Manual
Hematology Hematology: Blood Grouping and Crossmatching Hematology: Blood Grouping and Crossmatching Medium MEDICAL Confidence: high