Quick thread (1/4):
A medic recently asked me why our protocols call for tranexamic acid for hemorrhage if it can be given within 3 hrs of injury/onset, but not after that. After some lit review, the answer is that there is no benefit in mortality after 180 minutes.
The paper: Gayet-Ageron et al. *Lancet*, 2018
https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(17)32455-8/fulltext
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