RESUMEN
INTRODUCTION: Delta-9-tetraydrocannabinol (THC) usage is associated with venous thromboembolic events (VTE) in trauma patients. We hypothesized that THC â+ âtrauma patients would have less platelet inhibition than THC - patients using thromboelastography with platelet mapping (TEG-PM). METHODS: Results from initial TEG- PM assays and patient's UDS were reviewed between 2019 and 2023. Mean levels of arachidonic acid (AA) and adenosine diphosphate (ADP) percent inhibition were compared by THC status. RESULTS: 793 patients had TEG-PM and UDS data. Mean levels of arachidonic acid (AA) percentage inhibition were 32.6 â± â34.2. AA inhibition was lower for THC â+ âvs THC- patients (THC+ 23.9 â± â27.0 vs THC- 34.3 â± â35.3, P â< â0.001). There was no association between THC status and ADP inhibition (THC+ 32.5 â± â27.1 vs THC- 30.8 â± â28.4, P â= â0.536). DISCUSSION: To our knowledge, our data are the first to suggest a clinically measurable increase in platelet reactivity in THC â+ âtrauma patients. More work is needed to determine if addition of aspirin to the chemoprophylaxis strategy for THC â+ âpatients would mitigate the known association of THC with VTE.