ArticleEuropean spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society2025
A study of dynamic F-waves in patients with symptomatic degenerative lumbar spinal stenosis.
Article in European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeTo quantify the dynamic F-waves in patients with degenerative lumbar spinal stenosis (DLSS) and to analyze the relationships between dynamic F-wave abnormalities and both the severity and surgical outcomes of DLSS.
methodsPreoperatively, peroneal F-waves were recorded bilaterally in 201 patients with DLSS and 52 healthy subjects before and after 10-minute walk tests, along with assessments of the Oswestry Disability Index (ODI), Zurich Claudication Questionnaire (ZCQ) and 36-Item Short Form Survey (SF-36). Questionnaire scores were re-evaluated 1 year after operation in all patients.
resultsUnlike normal controls, patients with DLSS had longer mean durations on both sides and lower F/M ratios on symptomatic side after the 10-minute walk test than before (P < 0.05). According to normal reference values from healthy subjects, a total of 129 (129/201, 64.2%) patients showed dynamic F-wave abnormalities. Preoperatively, these 129 patients had worse physical function according to both the SF-36 and ZCQ scores compared with the other patients (P < 0.05). Postoperatively, patients with dynamic F-wave abnormalities exhibited better patient satisfaction and greater improvements in physical function than did those without F-wave abnormalities.
conclusionsComparisons of F-waves before and after the 10-minute walk test revealed clear dynamic F-wave abnormalities in patients with DLSS, even in those without neurogenic claudication. Equally important, the assessments of dynamic F-waves may offer additional insight into both the severity and postoperative outcomes, especially patient satisfaction, of DLSS.
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