title: Patient outcomes after minimally destabilizing lumbar stenosis decompression: the "Port-Hole" technique.
abstract: METHODS
  A prospective evaluation of the outcome of a decompressive procedure for lumbar spinal stenosis designed to preserve spinal stability.
  
  
  OBJECTIVE
  To determine whether decompression could be achieved without subsequent fusion for spinal stenosis with and without degenerative spondylolisthesis.
  
  
  BACKGROUND
  The traditional surgical decompression of spinal stenosis involves removal of the posterior elements. Success occurs in 64% of cases, on the average, with results deteriorating over time. Concomitant spinal fusion is associated with higher costs and complication rates.
  
  
  METHODS
  This prospective study included 54 consecutive patients treated surgically by one surgeon. Patients were contacted 21/2 and 4 years, on the average, after surgery. Patients with spondylolisthesis were evaluated for worsening of the listhesis after surgery.
  
  
  RESULTS
  At a mean of 4 years after surgery, all patients were satisfied with their treatment. Concerning their symptoms, 80% reported relief of back pain; 96% had improvement of leg pain; 93% experienced relief of leg numbness; and 97% had relief of lower extremity weakness. Before surgery, only 1 patient could walk for longer than 15 minutes. After surgery, 98% (47/48) could walk for more than 15 minutes. Overall clinical results were graded as good to excellent (88%), fair (8%), or poor (4%). Clinical outcomes were comparable between those with and without degenerative spondylolisthesis (P = 0.08). Patients with degenerative spondylolisthesis showed no change in the amount of slip in 13/15 patients (87%).
  
  
  CONCLUSIONS
  Degenerative spinal stenosis, even with nonlytic spondylolisthesis, can be decompressed effectively without violating the integrity of the posterior elements.
authors.affiliation: New Hampshire Spine Institute, Bedford, NH 03110, USA. tkleeman@pol.net
authors.forename: T J
authors.initials: TJ
authors.lastname: Kleeman
authors.forename: A C
authors.initials: AC
authors.lastname: Hiscoe
authors.forename: E E
authors.initials: EE
authors.lastname: Berg
mesh_terms: D000368:Aged; D016022:Case-Control Studies; D019299:Decompression, Surgical; D017079:Exercise Tolerance / Q000502:physiology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D017843:Ligamentum Flavum / Q000601:surgery; D008159:Lumbar Vertebrae / Q000601:surgery; D008297:Male; D017060:Patient Satisfaction; D011446:Prospective Studies; D013130:Spinal Stenosis / Q000601:surgery*; D013168:Spondylolisthesis / Q000601:surgery*; D013997:Time Factors; D016896:Treatment Outcome; D016138:Walking / Q000502:physiology