flexors (50%), right hip flexors (71%), left hip abductors (106%), right hip abductors (-3%), left knee flexors (43%), right knee flexors (24%), left knee extensors (105%), and right knee extensors (80%). It should be noted that although a decrease of 3% was observed in the right hip abductors, the difference between right and left was reduced from 46 to 13%. Pain disability questionnaire (PDQ) score decreased from 147/150 to 59/150. Quadruple visual analog scale (QVAS) pain score decreased from 76.67/100 to 33.33/100. Back Bournemouth questionnaire score decreased from 23/70 to 13/70.
A recent review of non-surgical spinal decompression efficacy trials established
that available data in the peer-reviewed literature are inconclusive in determining whether spinal decompression is superior to other non-surgical treatments in treating LBP.8 Since that review, two new studies have demonstrated the safety and efficacy of the DRX9000, along with two case reports suggesting the positive physical effects of treatment on the intervertebral disc.4–7
A retrospective study evaluated 94 patients treated with the DRX9000 between September 2005 and March 2006.4 Diagnoses consisted of disc herniations (73% of patients), degenerative disc disease (68%), and a combination of both (27%). Median duration of LBP was 260 weeks. The patients presented with an average pain score (NRS) of 6.05, which decreased to 0.89 at the end of treatment. Oswestry Disability Index score decreased from 21.9 at presentation to 6.5 at completion. The patients also reported decreased analgesic use and rated the DRX9000 8.55/10 on a satisfaction survey. This chart audit suggests that chronic LBP and functionality improve with treatment on the DRX9000.
A prospective, multicenter, non-randomized phase II pilot study followed 18 patients treated between January 2007 and April 2007.5 The study participants underwent a course of 20 DRX9000 treatments over a six-week period. Mean duration of LBP was 526 weeks, with numerous failed therapies prior to the DRX9000. The average pain score at presentation was 6.4, and