American Society of Anesthesiologists Score is Not Predictive of Complication Incidence After Minimally Invasive Posterior Lumbar Spine Procedures

International Journal of Spine Surgery
Ankur S NarainKern Singh

Abstract

Complications occurring after spinal procedures are associated with recurrent symptomatology, new-onset symptomatology, and increased health care costs. The American Society of Anesthesiologists (ASA) score is a commonly cited risk factor for complication incidence. Few investigations have been performed analyzing the relationship between ASA score and complication rate following spinal minimally invasive surgery (MIS) decompressions or fusions. Therefore, the purpose of this study is to determine whether an association exists between preoperative ASA score and the incidence of postoperative complications among patients undergoing MIS posterior lumbar decompression or fusion. A surgical registry of patients undergoing single-level MIS posterior lumbar decompressions or fusions between 2007 and 2016 was retrospectively reviewed. Patients were stratified by preoperative ASA score (≤2, >2). The ASA score was tested for an association with preoperative demographic, comorbidity, and perioperative characteristics using the Student t test or χ2 analysis. Multivariate Poisson regression with robust error variance was used to test for an association between ASA score and the incidence of complications up to 6 months postoperatively. A t...Continue Reading

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