Treatment for obstructive sleep apnoea: effect on peripheral nerve function. Issue 3 (29th September 2006)

• Record Type: Journal Article
• Authors: Dziewas, Rainer; Schilling, Matthias; Engel, Philipp; Boentert, Matthias; Hor, Hyon; Okegwo, Angelika; Lüdemann, Peter; Ringelstein, E Bernd; Young, Peter
• Is Part Of: Journal of neurology, neurosurgery and psychiatry. Volume 78:Issue 3(2007)
• Page Start: 295
• Page End: 297
• Publication Date: 2006-09-29
• Subjects: AHI, Apnoea–Hypopnea Index -- BMI, body mass index -- CT90, percentage of night time with an oxygen saturation below 90% -- nCPAP, nasal continuous airway pressure -- OSA, obstructive sleep apnoea -- RICF, resistance to ischaemic conduction failure -- SNAP, sensory nerve action potential; Neurology -- Periodicals; Nervous system -- Surgery -- Periodicals; Psychiatry -- Periodicals; 616.8
• DOI: 10.1136/jnnp.2006.102806
• Languages: English
• ISSNs: 0022-3050

Abstract

Abstract : Background and objective: Obstructive sleep apnoea (OSA) is suggested to be associated with peripheral nerve damage. A case–control study was conducted to provide further support to this observation. In a longitudinal intervention study, it was examined whether treatment for OSA has a possible beneficial effect on peripheral nerve function. Methods: Participants were 23 patients with OSA and 23 controls matched for age and body mass index (BMI), all without any known cause of peripheral nerve damage. The sensory nerve action potential (SNAP) amplitudes of both sural nerves were determined. After 6 months of treatment for OSA, treatment compliance was evaluated and nerve conduction studies were repeated. Results: Patients with OSA had significantly lower mean (standard deviation) sural SNAP amplitudes than controls (6.3 (3.5) v 11.2 (5.0), p<0.001). Multivariate regression analysis including the variables age, BMI and Apnoea–Hypopnea Index (AHI) showed that both age (p<0.01) and AHI (p<0.05) were inversely related to the SNAP amplitude. On follow-up, the sural SNAP showed an increase of 2.6 mV on average (p<0.001). Multivariate regression analysis including the variables age, BMI, AHI, pretreatment SNAP and treatment compliance identified only treatment compliance as being significantly related to the SNAP increase (p⩽0.005). Conclusion: OSA is an independent risk factor for axonal dysfunction of peripheral sensory nerves. Impaired neural function is at least partly reversible with treatment for sleep apnoea.