Analyse von Stimmparametern nach konservativer Behandlung von Larynxparesen mit konventioneller Stimmübung oder neuromuskulärer elektrophonatorischer Stimulation

Abstract

Two groups of patients with unilateral or bilateral paresis of the nervus laryngeus inferior were treated with conventional voice therapy or neuromuscular electrophonatory stimulation (NMEPS). A few had additional paresis of the nervus laryngeus superior. After therapy pareses resolved or were compensated for. Successful therapy outcome can be verified on the basis of voice quality parameters. Significant improvements for both therapy groups were observed in case of parameters indicating frequency irregularities and noise-to-harmonic ratio. Only the patients treated with NMEPS reached significantly better results in case of soft phonation index after resolution of paresis.

Electrical Stimulation in Treatment of Pharyngolaryngeal Dysfunctions

“…Several studies investigated the effect of transcutaneous NMES on unilateral [10,11,12] and/or bilateral [13] vocal fold paresis, others tried more invasive forms of application, such as needle electrodes placed in the middle portion of the laryngeal abductor muscle [12]. Ptok and Strack [10,11] and Dahl and Witt [13] compared the effectiveness of conventional voice therapy in comparison with electrical stimulation-supported voice exercise.…”

“…Several studies investigated the effect of transcutaneous NMES on unilateral [10,11,12] and/or bilateral [13] vocal fold paresis, others tried more invasive forms of application, such as needle electrodes placed in the middle portion of the laryngeal abductor muscle [12]. Ptok and Strack [10,11] and Dahl and Witt [13] compared the effectiveness of conventional voice therapy in comparison with electrical stimulation-supported voice exercise. Both groups found superior therapy results in the NMES groups regarding voice parameters, such as vocal fold irregularity [10,11] and maximum phonation time [10,11] or regeneration rates [13] and enhancement periods [13].…”

“…Ptok and Strack [10,11] and Dahl and Witt [13] compared the effectiveness of conventional voice therapy in comparison with electrical stimulation-supported voice exercise. Both groups found superior therapy results in the NMES groups regarding voice parameters, such as vocal fold irregularity [10,11] and maximum phonation time [10,11] or regeneration rates [13] and enhancement periods [13]. Zealear et al [12] found that the magnitude of electrically induced vocal fold abduction during inspiration was comparable to the spontaneous movement on the unimpeded side.…”