• Mick J Perez-Cruet, Namath S Hussain, G Zachary White, Evan M Begun, Robert A Collins, Daniel K Fahim, Girish K Hiremath, Fadumo M Adbi, and Sammy A Yacob.
• From the Department of Neurosurgery, Oakland University William Beaumont School of Medicine, Royal Oak, MI.
• Spine. 2014 Feb 1; 39 (3): E191-8.

Study DesignThis was a prospective clinical study that took place in an outpatient spine clinic.ObjectiveTo demonstrate the short-/long-term outcomes from a large cohort of patients undergoing minimally invasive transforaminal lumbar interbody fusion (MITLIF).Summary Of Background DataLong-term prospective outcomes in patients undergoing minimally invasive spinal fusion for debilitating back pain has not been well studied.MethodsPresenting diagnosis was determined from clinical findings and radiographical (radiograph, magnetic resonance image, computed tomographic scan) evaluations preoperatively. Patients were assessed with outcome measures preoperatively, and postoperatively at 2 weeks, 3 months, 6 months, 12 months, 24 months, and annually 2 to 7 years (mean follow-up: 47 mo) final follow-up. The rate of postoperative complications and reoperations at the initial level of MITLIF and adjacent level(s) were followed. Fusion rates were assessed blinded and independently by radiograph.ResultsVisual analogue scale scores decreased significantly from 7.0 preoperatively to 3.5 at mean 47-month follow-up. Oswestry Disability Index scores declined from 43.1 preoperatively to 28.2 at mean 47-month follow-up. Short-Form 36 mental component scores increased from 43.8 preoperatively to 49.7 at 47-month follow-up. Short-Form 36 physical component scores increased from 30.6 preoperatively to 39.6 at 47-month follow-up (P < 0.05).ConclusionThis prospectively collected outcomes study shows long-term statistically significant clinical outcomes improvement after MITLIF in patients with clinically symptomatic spondylolisthesis and degenerative disc disease with or without stenosis. MITLIF resulted in a high rate of spinal fusion and very low rate of interbody fusion failure and/or adjacent segment disease requiring reoperation while reducing postoperative complications.Level Of Evidence3.

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