Data di Pubblicazione:
2012
Citazione:
Effects of vagal nerve stimulation on vocal functions / E. Gardella, P. Schiavo, A. Maccari, E. Zambrelli, C. Marras, G. Felisati, M.P. Canevini. - In: EPILEPSIA. - ISSN 0013-9580. - 53:Suppl. 5(2012 Sep), pp. 201-202. ((Intervento presentato al 10. convegno European Congress on Epileptology tenutosi a London nel 2012.
Abstract:
Purpose: This study aims to describe the subjective and objective
effects of Vagal Nerve Stimulation (VNS) on vocal functions
Method: We studied 14 patients (7 males/ 7 females) affectred by drug
resistant epilepsythat underwent VNS implantation. Mean patients agewas
41 years. Latency from implantation ranged from 1 to 8 years.
Patients subjecticve disturbs have been investigated performing an
unstructured colloquium and by self administered questioner. Vocal
functions have been studied by means of larygeal fibroscopy (LF) and
vocal analysis (MultiDimensionalVoiceProgram Kay Pentax TM) both at
rest and dring VNS stimulation.
Result: (a) immediatly after implantation patients (n 4) referred
chronic dysphonia +/) dysphagia, that could periodically and intermittently
worsen, in relation to VNS discharge. Chronic disturbs gradually
recovered 2–3 months after surgery, whilst in most cases intermittent
dysphonia was also present for 3–10 days after each following increment
of the VNS amperage. LF and VA documented unilateral hypomobility
of vocal cord and phonological alteration while the stimulator
was switched off; disturbs worsened during VNS discharges. (b) patients studied (n 10) after 1–8 years from implantation, occasionally
referred vocal disturbs (2 patients presented sporadically intermittent
dysphonia). LF and VA documented in 9/10 cases a residual hypomobility
of the vocal cord, functionally compensated from the contralateral
vocal cord hyperadduction.
Conclusion: We documented that both surgergical procedure and electrical
stimulation of the vagal nerve can perturb the motility of the vocal
cord homolateral t the side of implantation. This incostantly produces
negative effects on vocal productions and occasionally is referred by
patients as a chronic disturb.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
E. Gardella, P. Schiavo, A. Maccari, E. Zambrelli, C. Marras, G. Felisati, M.P. Canevini
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