PARTIAL OCCLUSION, LESS AKI: AN AORTA REGISTRY ANALYSIS OF PREBOA-PRO.

Background: Noncompressible torso hemorrhage remains a leading cause of potentially preventable deaths. Resuscitative Endovascular Balloon Occlusion of the Aorta (REBOA) has emerged as an adjunct temporizing hemorrhage control. The complete occlusion strategy with the ER-REBOA catheter can cause distal ischemia when used for longer than 30 min. To specifically address this limitation, the pREBOA-PRO catheter was developed. The objective of the current study is to investigate the impact of longer, partial occlusion times provided by pREBOA-PRO on acute kidney injury and mortality. Methods: This is a retrospective analysis of the Aortic Occlusion for Resuscitation in Trauma and Acute Care Surgery registry as of August 2023. Patients in the pREBOA-PRO group (n = 110) receiving partial occlusion in Zone 1 were contrasted to patients in the ER-REBOA group (n = 752) treated with complete occlusion in Zone 1. Between-group comparisons included demographics, clinical presentation, aortic occlusion strategy, clinical complications, and mortality. Results: Demographics, clinical presentation, and mortality were indistinguishable between groups, except for age which was higher in the ER-REBOA group (44 vs. 38, P < 0.002). The partial aortic occlusion strategy was employed more often in the pREBOA-PRO group (87% vs. 33%, P < 0.05) and for longer periods (59 min vs. 50 min, P < 0.003). In contrast, AKI occurred less frequently in the pREBOA-PRO group (19% vs. 33%, P < 0.05). Conclusions: The more frequently partial and longer occlusion times in Zone 1 with the use of pREBOA-PRO resulted in lower AKI incidence suggesting that this newer device is a safer extended bridge to hemorrhage control.