Prospective Assessment of a Protocol Using Neuromonitoring, Early Limb Reperfusion, and Selective Temporary Aneurysm Sac Perfusion to Prevent Spinal Cord Injury during Fenestrated-branched Endovascular Aortic Repair

Objective: The aim of this study was to analyze the outcomes of a standardized protocol using routine CSFD, neuromonitoring, LL reperfusion, and selective TASP to prevent SCI during F-BEVAR. Background: SCI is to be the most devastating complication for the patient, family, and surgeon, with impact on patienta's quality of life and long-Term prognosis. An optimal standardized protocol may be used to improve outcomes. Methods: Patients enrolled in a prospective, nonrandomized single-center study between 2013 and 2018. A SCI prevention protocol was used for TAAAS or complex abdominal aneurysms with a‰¥5-cm supraceliac coverage including CSFD, neuromonitoring, LL reperfusion, and selective TASP. Endpoints included mortality and rates of SCI. Results: SCI prevention protocol was used in 170 of 232 patients (73%) treated by F-BEVAR. Ninety-one patients (55%) had changes in neuromonitoring, which improved with maneuvers in all except for 9 patients (10%) who had TASP. There was one 30-day or in-hospital mortality (0.4%). Ten patients (4%) developed SCIs including in 1% (1/79) of patients with normal neuromonitoring and 10% (9/91) of those who had decline in neuromonitoring (P = 0.02). Permanent paraplegia occurred in 2 patients (1%). Factors associated with SCI included total operating time (odds ratio 1.5, 95% confidence interval 1.1-2.2, P = 0.02) and persistent changes in neuromonitoring requiring TASP (odds ratio 15.7, 95% confidence interval 2.9-86.2, P = 0.001). Conclusion: This prospective nonrandomized study using a standardized strategy to prevent SCI was associated with low incidence of the SCI during F-BEVAR. Permanent paraplegia occurred in 1%.