What is the primary purpose of using a 'type and screen' protocol in pre-transfusion testing?

A To identify the ABO blood group of the recipient
B To detect the presence of alloantibodies in the recipient's serum ✓
C To determine the RhD blood type of the donor
D To crossmatch the donor's red blood cells with the recipient's serum

Explanation

The 'type and screen' protocol is used to identify the ABO blood group of the recipient and to detect the presence of alloantibodies in their serum, which helps to reduce the risk of transfusion reactions.

Source

AABB Technical Manual
Hematology Hematology: Blood Grouping and Crossmatching Hematology: Blood Grouping and Crossmatching Easy MEDICAL Confidence: high