• Alan T Villavicencio, Ewell Lee Nelson, Alexander Mason, Sharad Rajpal, and Sigita Burneikiene.
• Boulder Neurosurgical Associates, Boulder, CO 80304, USA.
• J Spinal Disord Tech. 2013 Aug 1;26(6):298-304.

Study DesignA retrospective chart review study was performed.ObjectiveThe primary objective of this study was to analyze our preliminary results to examine whether it is safe and effective to perform instrumented lumbar interbody fusions on an outpatient basis by comparing 2 groups of patients who were discharged the same day versus those who stayed overnight. The secondary objective was to identify the need for prolonged observation for complications that may occur in the immediate postoperative period.Summary Of Background DataThere is currently no information in the literature on the safety and complication rates of instrumented transforaminal lumbar interbody fusions performed in an ambulatory surgery setting.MethodsSurgeries were performed at an ambulatory surgery center (n=27) or hospital outpatient departments (n=25). The mean age of patients was 49.8 years (range, 19-72 y). The safety of outpatient lumbar fusions was assessed by analyzing complications that occurred from the moment of discharge up to the seventh postoperative day (0-7 POD), as well as all complications that occurred up to 6 months postoperatively (>7 POD). The efficacy of surgical intervention was also evaluated by assessing change in pain, patient satisfaction scores, and fusion rates.ResultsThere were no cases of pneumonia, urinary tract infection, or thromboembolic complications. Four patients (14%) who had surgeries performed at an ambulatory surgery center had complications within 7 days postoperatively compared with 1 (4%) patient who had surgery performed at a hospital outpatient department. This difference was not statistically significant (P=0.36, Fisher exact test). Lower back and leg pain was significantly (P<0.0001) decreased postoperatively. The average postoperative back pain was 18.8 (range, 0-90) compared with 74.5 (range, 0-100) preoperatively as measured on a 0-100 visual analog scale. The average postoperative leg pain was 9.1 (range, 0-60) compared with 54.2 (range, 0-100) preoperatively.ConclusionsAlthough further confirmation is needed, this study discusses the possibility of performing instrumented lumbar interbody fusions with the transforaminal lumbar interbody fusion technique as an outpatient procedure. These results support a future prospective randomized study with a well-defined patient selection criteria.

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