BACKGROUND:There is paucity of high-quality data on the effect of cannabis consumption on perioperative outcomes after hepatobiliary and pancreatic (HPB) surgery. METHODS:Data from the Nationwide Inpatient Sample (2016-2020) were used. In-hospital complications, length-of-stay and hospitalisation charges were compared among patients undergoing HPB surgery. RESULTS:We identified 191,315 patients, of which 1705 (0.89 %) were cannabis consumers. Cannabis consumers were more likely to be male (67.5 % vs 50.2 %), younger, and Black (22.6 % vs 11.0); p < 0.001 for all. Multivariate analysis demonstrated a significantly lower risk of pneumonia (OR 0.54, 95 % CI 0.29-0.99) among cannabis consumers. There was no significant difference in risk of in-hospital mortality (OR 0.64, 95 % CI 0.31-1.30), acute kidney injury, hemodialysis, blood transfusion, vasopressor use, invasive and non-invasive mechanical ventilation, venous thromboembolism, portal vein thrombosis, intraabdominal abscess, peritonitis, surgical site infection, post-procedure haemorrhage/hematoma, wound dehiscence, liver failure, or sudden cardiac arrest. There was no significant difference in length-of-stay (mean 10.99 vs 9.69 days; p = 0.348) or hospitalisation costs ($49,444 vs $43,661; p = 0.109). CONCLUSION:There is no significant difference in major perioperative complications after HPB surgery among patients with cannabis use disorder. Further, there is no significant difference in health services utilisation among consumers versus non-consumers.

BACKGROUND:There is debate in the trauma literature regarding the effect of prolonged prehospital transport on morbidity and mortality. This study analyzes the management of hepatic trauma patients requiring surgery and compares the outcomes of the group that was transferred to the University of New Mexico Hospital (UNMH) from outside institutions, to the directly admitted group. MATERIALS AND METHODS:The UNMH Trauma Database was queried from 2005-2012. Of 674 patients who sustained liver injuries, 163 required surgery: 46 patients (28.2%) underwent interhospital transfer, and 117 (71.8%) were directly admitted. Variables examined included transfer status, trauma mechanism, transport type, injury severity score (ISS), liver injury grade, and associated injuries. Outcome variables included length of stay (LOS) and 30-day mortality. Outcomes of the transfer group (TG) and direct admit group (DAG) were compared. RESULTS:Both TG and DAG had the same median age (31 y, P = 0.33). The blunt-to-penetrating ratio was the same for each group (48% blunt: 52% penetrating, P = 1.0). Median ISS was 25 for the TG and 26 for the DAG. Grade III or higher injury occurred in 29 (63%) of the TG and in 68 (58%) of the DAG (P = 0.56). Median hospital LOS was 14 d for TG and 9 d for DAG (P = 0.15). Median intensive care unit LOS was 4 d for both groups (P = 0.71). Thirty-day mortality was 20% in each group (P = 0.27). Using a multiple logistic regression model for the outcome of mortality, only age, ISS, and liver injury grade, not transfer status or transport type, had a significant effect on mortality. CONCLUSIONS:There was no significant difference in liver injury grade, ISS, LOS, and mortality between TG and DAG. In the patient population of our study, transfer status did not affect outcome.