Artikel
Posterior approach and spinal cord release for 360° repair of dural defects in spontaneous intracranial hypotension
Suche in Medline nach
Autoren
Veröffentlicht: | 18. Juni 2018 |
---|
Gliederung
Text
Objective: Spinal cerebrospinal fluid (CSF) leaks are the cause of spontaneous intracranial hypotension (SIH). We describe our technique for sealing CSF leaks around the 360° circumference of the dura through a tailored hemilaminotomy.
Methods: All consecutive patients undergoing spinal surgery between February 2013 and November 2017 were included. We systematically classified the exact anatomic site of the CSF leak (category I–III) at the 360° circumference of the dura. Correspondingly, we determined 4 surgical trajectories for microsurgical sealing of the CSF leak.
Results: 50 SIH patients had a neuroradiologically identified spinal CSF leak between the levels C6 and L1. Intraoperatively, we identified the dural tear around the thecal circumference in all patients. All dural defects with (I) anterior (n = 39), (II) lateral (n = 9), and (III) foraminal (n = 2) locations were sealed through a single standardized tailored posterior hemilaminotomy using a transdural (n = 32), paradural (n = 7), direct extradural (n = 9) or foraminal (n = 2) trajectory. The transdural trajectory necessitated cutting the dentate ligament accompanied by elevation and rotation of the spinal cord under continuous neuromonitoring (spinal cord release maneuver, SCRM). No patient experienced a permanent neurological deficit; 4 patients had transient deficits.
Conclusion: We developed a microsurgical strategy to visualize and seal all dural defects around the 360° surface of the dura via a tailored hemilaminotomy by defining three anatomical categories with four corresponding surgical trajectories.