Application of electroglottography to dysphagia in stroke patients.

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Twenty-one stroke patients (11 subjectively dysphagic, 10 not dysphagic) and 21 healthy men were examined by electroglottography (EGG) to determine the quantitative nature of their deglutition function. Impedance changes in cervical tissue were recorded with an EGG during deglutition. Three healthy men were examined by videofluorography simultaneously with EGG to determine the relationship between the two examinations.The latency of EGG in the subjectively dysphagic patients was delayed significantly compared with the nondysphagics and healthy men (p<0.05, p<0.01). The magnitude of impedance change did not differ between the three groups. The duration and number of phase in EGG wave form in healthy subjects were shorter and significantly less compared with the subjectively dysphagic patients and nondysphagics (p<0.01, p<0.05). The results of videofluorography revealed that the EGG wave form was recorded when the larynx descended and the pharynx was dilatated.These findings suggest that quantitative evaluation of deglutition function in stroke patients is possible by EGG examination and EGG has the potential to be used as a therapeutic modality in biofeedback.
社団法人日本リハビリテーション医学会の論文