Platelet Transfusion Guidelines in Hemorrhagic Stroke

Primary Indications Based on Platelet Count

The American College of Critical Care recommends maintaining a platelet count above 100 × 10⁹/L in patients with traumatic brain injury and above 50 × 10⁹/L in other hemorrhagic stroke patients with ongoing bleeding 1, 2
For patients with traumatic brain injury, the initial dose should be 4-8 single platelet units or one apheresis pack, with a target platelet count >100 × 10⁹/L 1, 2
For non-traumatic hemorrhagic stroke patients with active bleeding, the target platelet count should be >50 × 10⁹/L 1, 2

The AABB guideline states that they cannot recommend for or against platelet transfusion in patients on antiplatelet therapy with intracranial hemorrhage, due to highly uncertain evidence 3, 4, 5
Conflicting observational data exists, with one study showing increased mortality and another showing decreased mortality with platelet transfusion in patients on antiplatelet therapy 3, 4, 5

The initial dose of platelet transfusion should be 4-8 single platelet units or one apheresis pack, containing 3-4 × 10¹¹ platelets, with the goal of increasing platelet count by >30 × 10⁹/L 1, 2

Clinical context, including bleeding severity and surgical planning, is paramount in guiding platelet transfusion decisions, not just the platelet count 3, 4
Platelet transfusion carries risks, including allergic reactions, bacterial sepsis, and potentially worsened outcomes in certain populations 3, 6

For central nervous system surgery, the conventional threshold for platelet count is 80-100 × 10⁹/L 3, 4
In cases of consumptive coagulopathy, addressing concurrent coagulopathy with FFP or fibrinogen concentrate is essential, as platelet transfusion alone may be insufficient 1