What is the restrictive transfusion threshold?

For stable ICU, medical, and surgical patients (excluding cardiac): transfuse when Hgb <7 g/dL. This approach (vs liberal threshold of <10 g/dL) was validated by the TRICC trial and is associated with equivalent or improved outcomes.

When is a liberal threshold (Hgb <8 g/dL) appropriate?

Liberal thresholds are appropriate for: patients with active cardiac ischemia, acute coronary syndromes, cardiac surgery (TRACS trial), hip fracture surgery (FOCUS trial), and symptomatic anemia (chest pain, dyspnea, tachycardia at rest).

How much does one unit of pRBC raise hemoglobin?

One unit of packed red blood cells typically raises hemoglobin by ~1 g/dL and hematocrit by ~3% in a 70 kg adult. Post-transfusion Hgb should be checked 15 minutes to 1 hour after completion.

Red Blood Cell Transfusion Trigger Threshold Calculator

Determines evidence-based hemoglobin transfusion thresholds by clinical context: ICU/stable patients <7 g/dL (restrictive), cardiac surgery <8 g/dL, symptomatic cardiovascular disease <8 g/dL, and CNS/orthopedic surgery <8–9 g/dL. Based on TRICC, TRACS, and TRICS-III trials.

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Frequently Asked Questions

What is the restrictive transfusion threshold?

When is a liberal threshold (Hgb <8 g/dL) appropriate?

How much does one unit of pRBC raise hemoglobin?