Head Injury and Neuroanesthesia
Risk Factors Associated with Ischemic Optic Neuropathy after Spinal Fusion Surgery
The Postoperative Visual Loss Study Group (Univ of Washington School of Medicine, Seattle; Univ of Chicago, IL; Univ of Iowa Carver College of Medicine; et al) Anesthesiology 116:15-24, 2012§
Perioperative visual loss, a rare but dreaded complication of spinal fusion surgery, is most commonly caused by ischemic optic neuropathy (ION). The authors sought to determine risk factors for ION in this setting.
Using a multicenter case-control design, the authors compared 80 adult patients with ION from the American Society of Anesthesiologists Postoperative Visual Loss Registry with 315 adult control subjects without ION after spinal fusion surgery, randomly selected from 17 institutions, and matched by year of surgery. Preexisting medical conditions and perioperative factors were compared between patients and control subjects using stepwise multivariate analysis to assess factors that might predict ION.