Positive direct antiglobulin test in COVID-19 patients: Decision-making process

Area of Science:

• Transfusion Medicine
• Immunology
• Infectious Diseases

Background:

• The COVID-19 pandemic has significantly impacted healthcare systems, including transfusion services.
• Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection is associated with a positive direct antiglobulin test (DAT).
• Patients with severe COVID-19 often develop anemia, necessitating red blood cell transfusions.

Observation:

• A positive DAT in COVID-19 patients presents a diagnostic challenge, especially in those recently transfused.
• Distinguishing between SARS-CoV-2-induced antibodies and transfusion-related alloantibodies is critical for safe transfusion practices.
• The interpretation of a positive DAT requires careful consideration of the patient's clinical status and transfusion history.

Findings:

• The elution technique, when integrated into a structured decision-making process, is vital for accurate antibody identification.
• This study reviews a case report and relevant literature to address the complexity of DAT interpretation in COVID-19 patients.
• A clear decision-making framework is proposed for managing red blood cell transfusions in this patient population.

Implications:

• Accurate differentiation of antibodies ensures the safety and efficacy of blood transfusions for COVID-19 patients.
• Improved diagnostic strategies can prevent transfusion reactions and optimize patient care during the pandemic.
• This work provides a valuable resource for clinicians and transfusion services managing complex transfusion scenarios in infectious disease crises.