Guideline Summary: When to Use Type‑and‑Screen vs. Full Crossmatch

Indications for Full Crossmatch

• For patients experiencing massive hemorrhage or active bleeding that requires immediate transfusion, a full crossmatch should be performed in advance. 1

Core Components of the Type‑and‑Screen Protocol

• The type‑and‑screen process includes ABO and RhD typing of the patient. 1

Emergency Transfusion Recommendations

• In true emergencies when the patient’s blood type is unknown, group O RhD‑negative blood is the safest choice. 1
• For male patients in emergency settings, group O RhD‑positive blood may be used to preserve O‑negative inventory. 1
• Once ABO/RhD typing is completed, group‑specific blood can be issued within roughly 10 minutes, accepting a modestly higher risk in massive‑bleeding scenarios where circulating antibodies are diluted. 1

Special Populations

• Patients with sickle‑cell disease should receive extended antigen‑matched red cells beyond standard ABO/RhD matching. 3

Sample Handling and Patient Identification

• Positive patient identification using two independent identifiers must be performed before sample collection. 7
• Blood samples should be labeled at the patient’s bedside immediately after collection. 7
• Two separate samples should be obtained for initial testing unless a valid historical sample is available. 7