• World Neurosurg · Sep 2022

    « ALL flap technique »: description of anterior longitudinal ligament opening during anterior lumbar spine surgery and review of vascular complications in 189 patients.

    • Antoine Gennari, Sung-Joo Yuh, Laetitia Le Petit, Zhi Wang, Ghassan Boubez, Bilal Tarabay, Daniel Shedid, Amandine Gavotto, Yann Pelletier, and Stéphane Litrico.
    • Division of Neurosurgery, Center Hospital of the University of Montreal, Québec, Canada; Division of Spine Surgery, Center Hospital of the University of Nice, Alpes-Maritimes, France. Electronic address: antoine_gennari@hotmail.fr.
    • World Neurosurg. 2022 Sep 1; 165: e743e749e743-e749.

    BackgroundOne of the main concerns of anterior lumbar spine approaches are vascular complications. The aim of our study is to provide technical details about a flap technique using the anterior longitudinal ligament (ALL) when approaching the lumbar spine via an anterior corridor. This can help decrease complications by protecting the adjacent vascular structures. We also include a retrospective cohort review.MethodsThis is a retrospective bicentric study: 189 patients with a mean age of 44.2 years underwent anterior lumbar spine surgery using the ALL flap technique. Patients were diagnosed with degenerative pathologies. We treated 239 lumbar levels primarily at the L4-5 and L5-S1: 88 single-level anterior lumbar interbody fusions, 9 two-level ALIFs, 51 total disk replacements (TDR), and 41 hybrid constructs (i.e., ALIF L5S1 and TDR L4L5). Anterior approaches were performed by two senior spine surgeons. The ALL flap technique was utilized in all of these cases, by carefully dissecting the ALL, with the flap suspended using sutures. As such, this ALL flap provided a "safe corridor" to avoid any potential vascular laceration.ResultsThe operative and early surgical complication rate was 3.2%. There was no arterial injury. There were only 2 minor venous lacerations (1.05%). No blood transfusion was required. Neither lacerations happened during disk space preparation.ConclusionsHere, we provide technical details about a simple and reproducible technique using the ALL as a flap, which may help spine surgeons minimize vascular injuries during ALIF or even TDR surgeries.Copyright © 2022 Elsevier Inc. All rights reserved.

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