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Updated: Nov 6, 2025
Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model
Published on: June 18, 2021
Commentary on Post, et al. Ultra-early tranexamic acid after subarachnoid hemorrhage: A randomized controlled trial.
Benjamin W Y Lo1, Hitoshi Fukuda2, Anderson C O Tsang3
1Department of Neurosurgery, Lenox Hill Hospital, New York, NY, United States.
Background:
Tranexamic acid (TA) administration in aneurysmal subarachnoid hemorrhage (SAH) within the first 24 hours may reduce the incidence of early aneurysmal rebleeding. However, this is also the potential for an increased risk of delayed cerebral ischemia if TA is administered for more than 72 hours following the initial aneurysmal rupture.
Methods:
In the ultra-early tranexamic acid after subarachnoid hemorrhage randomized controlled trial by Post et al., patients were randomized to receive TA within the first 24 hours, or until start of aneurysm treatment. These results were compared to a matched control group.
Results:
Ultra-early administration (≤24 h) of TA reduced the incidence of rebleeding, and did not alter the incidence of delayed cerebral ischemia and/or extracranial thrombosis. Further, no significant differences were noted between the TA group and control arm in the incidence of good (modified Rankin scores 0-3) clinical outcomes at 6 months.
Conclusion:
Ultra-early administration of TA (≤24 h) resulted in a lower rate of recurrent hemorrhage, without increasing the incidence of delayed cerebral ischemia in SAH patients.
