title: Treatment of 94 outpatients with chronic discogenic low back pain with the DRX9000: a retrospective chart review.
abstract: BACKGROUND
  This study's goal was a retrospective chart audit of 100 outpatients with discogenic low back pain (LBP) lasting more than 12 weeks treated with a 2-month course of motorized spinal decompression via the DRX9000 (Axiom Worldwide, Tampa, FL, U.S.A.).
  
  
  METHODS
  Patients at a convenience sample of four clinics received 30-minute DRX9000 sessions daily for the first 2 weeks tapering to 1 session/week. Treatment protocol included lumbar stretching, myofascial release, or heat prior to treatment, with ice and/or muscle stimulation afterwards. Primary outcome was verbal numerical pain intensity rating (NRS) 0 to 10 before and after the 8-week treatment.
  
  
  RESULTS
  Of the 100 initial subjects, three withdrew their protected health information, and three were excluded because their LBP duration was less than 12 weeks. The remaining 94 subjects (63% female, 95% white, age = 55 (SD 16) year, 52% employed, 41% retired, LBP median duration of 260 weeks) had diagnoses of herniated disc (73% of patients), degenerative disc disease (68%), or both (27%). Mean NRS equaled 6.05 (SD 2.3) at presentation and decreased significantly to 0.89 (SD 1.15) at end of 8-week treatment (P < 0.0001). Analgesic use also appeared to decrease (charts with data = 20) and Activities of Daily Living improved (charts with data = 38). Follow-up (mean 31 weeks) on 29/94 patients reported mean 83% LBP improvement, NRS of 1.7 (SD 1.15), and satisfaction of 8.55/10 (median 9).
  
  
  CONCLUSIONS
  This retrospective chart audit provides preliminary data that chronic LBP may improve with DRX9000 spinal decompression. Randomized double-blind trials are needed to measure the efficacy of such systems.
authors.affiliation: Department of Anesthesia and Health Research & Policy, Stanford University School of Medicine, Stanford, California 94305-5640, USA. amaca@stanford.edu
authors.forename: Alex
authors.initials: A
authors.lastname: Macario
authors.forename: Charlotte
authors.initials: C
authors.lastname: Richmond
authors.forename: Martin
authors.initials: M
authors.lastname: Auster
authors.forename: Joseph V
authors.initials: JV
authors.lastname: Pergolizzi
mesh_terms: D000328:Adult; D000368:Aged; D000700:Analgesics / Q000627:therapeutic use; D003131:Combined Modality Therapy; D004867:Equipment Design; D005260:Female; D006801:Humans; D007405:Intervertebral Disc Displacement / Q000150:complications* / Q000628:therapy; D017116:Low Back Pain / Q000188:drug therapy / Q000209:etiology / Q000628:therapy*; D008159:Lumbar Vertebrae; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement; D012189:Retrospective Studies; D014143:Traction / Q000295:instrumentation* / Q000379:methods; D016896:Treatment Outcome
chemical_list: D000700:Analgesics