A clinical analysis of interspinous dynamic stabilization device (Wallis) in patients of degenerative lumbar disease：52 cases report
SONG Hong-xing
YU Bo
SHEN Hui-liang
YU Fang
FU Sheng-liang
Abstract：Objective To explore the interim effects and indications of the treatment of degenerative lumbar disease with Wallis interspinous dynamic stabilization system.Methods From May 2007 to March 2012, a retrospective analysis was done and 52 patients ( 27 males and 25 females ) with an average age of 47.3 years ( range: 38-64 years ) , receiving fenestration and stabilization using Wallis interspinous dynamic stabilization system, were reviewed. Segments involved: 48 cases with single segment at L4-5, 4 cases with double segments at L4-S1. Preoperatively and postoperatively, results of visual analogue scales ( VAS ), Oswestry disability index ( ODI ) and Japanese orthopaedic association ( JOA ) score were recorded and the range of motion ( ROM ) and posterior disc height ( PDH ) of operated segments were measured.Results 52 patients were followed up with an average of 28.3 months ( range: 24-36 months ). Mean time of surgery overall was 113.2 minutes ( range: 70-230 mins ). Average blood loss was 82.6 ml ( range: 20-300 ml ). The PDH of operated segments was ( 7.80±3.2 ) mm preoperatively, and ( 7.20±0.7 ) mm in the latest follow up. The preoperative VAS score, ODI score and JOA score was 7.60±1.0, 39.0±3.3 and 17.5±2.4 respectively, and 1.70±0.6, 17.7±0.3 and 25.6±0.7 respectively in the latest follow up. In the latest follow up, the PDH of the operative segments had no signiifcant difference compared with that of preoperation (P=0.09 ). Other data including VAS score, Oswestry score and JOA score were statistically and signiifcantly improved (P=0.003,P=0.005,P=0.007 respectively ). One patient with prolapse of lumbar intervertebral disc was diagnosed as recurrent herniation after the surgery, who received conservative treatment. Another patient with lumbar stenosis felt slight change after surgery, then the patient underwent extensive laminectomy and interbody fusion. Symptoms were relieved. No complications including prosthesis shift in other patients were found. No segment instability and severe degeneration of adjacent segments were found during the follow-up.Conclusions The clinical outcomes of Wallis in the treatment of degenerative lumbar diseases are satisfactory in the interim stage. The wallis dynamic stabilization system can retain the range of motion of the operated segments. It is a good choice for the treatment of lumbar stenosis without severe degeneration.
Keywords：Spinal stenosisIntervertebral disc degenerationLumbar vertebraeSpine
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 856-860 )