New 2025 AABB Platelet Transfusion Guidelines

Written by Clay Smith

Spoon Feed
A restrictive platelet transfusion strategy was better in most clinical scenarios. Here are the latest guidelines in brief.

Platelet guidance for you…
Transfusion of platelets is not without risk. The number needed to harm (in units transfused): allergic 33-100; anaphylactic 20,000-50,000; febrile 100-1,000; sepsis 10,000; TACO* 385; TRALI** 33,333. Limiting platelet transfusion reduces some harms, but thrombocytopenia is not without risk either.

This AABB/ICTMG*** guideline covers several clinically relevant questions. All platelet counts are x 10³/µL. The number listed is considered the transfusion threshold.

Strong Recommendations – [Condition: transfusion threshold; certainty of evidence]

• Non-bleeding hypoproliferative thrombocytopenia (active chemotherapy, allogeneic stem cell transplant (SCT)): <10; moderate
• Preterm neonates without major bleeding: <25; high
• Lumbar puncture: <20; moderate
• Dengue consumptive thrombocytopenia: none, possible harm; moderate

Conditional Recommendations – [Condition: threshold; certainty of evidence]

• Non-bleeding adult, hypoproliferative thrombocytopenia, autologous SCT or aplastic anemia: none, no prophylactic transfusion threshold; low to very low
• Adults consumptive thrombocytopenia from non-Dengue critical illness without major bleeding: <10; very low
• Adult central venous catheter, non-compressible site: <10; moderate to very low
• Adult interventional radiology procedure: <20 if low-risk, <50 if high-risk procedure; very low
• Adult major non-neuraxial surgery: <50; very low
• Non-thrombocytopenic, cardiovascular surgery, with no major hemorrhage, including CABG: none; very low
• Adult spontaneous or traumatic ICH with platelets >100, even if on antiplatelet agents: none; low to very low

How will this change my practice?
We’ve covered various aspects of platelet transfusion before, but it’s nice to have all this in one place. The main point seems to be that platelet counts can get quite low before transfusion is needed in most cases, and a restrictive vs. liberal strategy is almost always better.

Source
Platelet Transfusion: 2025 AABB and ICTMG International Clinical Practice Guidelines. JAMA. 2025 Aug 19;334(7):606-617. doi: 10.1001/jama.2025.7529. PMID: 40440268.

*TACO = transfusion-associated circulatory overload; **TRALI – transfusion-associated acute lung injury; ***AABB/ICTMG = Association for the Advancement of Blood and Biotherapies/International Collaboration for Transfusion Medicine Guidelines