In search of the transfusion trigger

Area of Science:

• Orthopaedic Surgery
• Transfusion Medicine
• Anesthesiology

Background:

• Red blood cell transfusions are frequently utilized in orthopaedic surgery, incurring significant annual costs.
• While intended to improve oxygen delivery and functional status, evidence suggests transfusions may be immunosuppressive, increasing infection risk.
• Current guidelines lack robust data on specific transfusion indications.

Purpose of the Study:

• To review the current evidence regarding the efficacy and indications for red blood cell transfusions in orthopaedic surgery.
• To highlight the need for further research, particularly randomized clinical trials, to establish transfusion efficacy.
• To provide interim guidance for orthopaedic surgeons regarding transfusion decisions.

Main Methods:

• Review of existing observational data and clinical trial evidence.
• Analysis of transfusion outcomes related to preoperative and postoperative hemoglobin levels.
• Consideration of patient comorbidities, such as cardiovascular disease.

Main Results:

• Observational data indicate no mortality benefit from transfusion in patients with hemoglobin levels ≥ 8 g/dL.
• Insufficient data exist to conclude the effect of transfusion in patients with hemoglobin levels < 8 g/dL.
• Transfusion is associated with immunosuppression and increased postoperative infection risk.

Conclusions:

• High-quality randomized clinical trials are essential to determine the true efficacy of red blood cell transfusions.
• Orthopaedic surgeons currently rely on clinical judgment for transfusion decisions due to limited evidence.
• A higher transfusion threshold is recommended for patients with cardiovascular disease.