In 2014, this study was to establish a relationship between tetrahydrocannabinol (THC) and mortality after TBI. Using 446 patients cases meeting all inclusion criteria.

Background:  A 3-year retrospective review of patients sustaining brain trauma. Patients THC positive survived surgery at 97.6 percent. While patients with no THC survived only an 88.5 percent rate.

You can read the abstract of the study here =>https://www.ncbi.nlm.nih.gov/pubmed/25264643