Perioperative blood transfusion and postoperative mortality

Area of Science:

• Geriatric Medicine
• Transfusion Medicine
• Surgical Outcomes

Background:

• Extensive research exists on blood transfusion risks, yet benefits and optimal hemoglobin thresholds remain unclear.
• Defining the appropriate hemoglobin concentration for transfusion is crucial for patient care.

Purpose of the Study:

• To investigate the impact of perioperative blood transfusions on 30-day and 90-day mortality rates.
• To analyze transfusion practices in elderly hip fracture patients.

Main Methods:

• Retrospective cohort study involving 8787 hip fracture patients aged 60+ across 20 US hospitals (1983-1993).
• Primary outcome: 30-day postoperative mortality; Secondary outcome: 90-day postoperative mortality.
• Analysis adjusted for trigger hemoglobin level, cardiovascular disease, and other mortality risk factors.

Main Results:

• Overall 30-day mortality was 4.6%, and 90-day mortality was 9.0%.
• 42% of patients received postoperative transfusions.
• Postoperative transfusion did not significantly impact 30-day (aOR 0.96) or 90-day mortality (aHR 1.08) after adjustment.
• No significant difference in 30-day mortality between pre-operative transfusion and no transfusion groups (aOR 1.23).

Conclusions:

• Perioperative transfusion in elderly hip fracture patients with hemoglobin levels ≥80 g/L did not affect 30- or 90-day mortality.
• At hemoglobin levels <80 g/L, 90.5% of patients received transfusions, limiting analysis of transfusion's effect at lower thresholds.