Impedance pharyngography to assess swallowing function

T. Kusuhara, T. Nakamura, Yasuhiro Shirakawa, K. Mori, Y. Naomoto, Y. Yamamoto

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


We evaluated impedance pharyngography (IPG), a new method to assess swallowing function based on changes in the electrical impedance of the neck during swallowing. The electrical impedance of the neck, recorded by the 4-electrode method, changed with the equivalent cross-sectional area of the route of the electric current due to reflex activities of related organs during swallowing. IPG waveforms accurately recorded the swallowing process, therefore. We recommend IPG for assessing swallowing function because we expect IPG to provide the following advantages over conventional diagnostic techniques: it is a quantitative method that allows for the objective assessment of swallowing function; it is a simple procedure that is convenient for the patient and could be used for screening; it is inexpensive and non-invasive, so could be performed repeatedly in situations such as re-habilitation; and it uses highly portable equipment suitable for community use.

Original languageEnglish
Pages (from-to)608-616
Number of pages9
JournalJournal of International Medical Research
Issue number6
Publication statusPublished - 2004


  • Ageing
  • Bioelectrical impedance
  • Dysphagia
  • Impedance pharyngography
  • Swallowing function

ASJC Scopus subject areas

  • Biochemistry
  • Cell Biology
  • Biochemistry, medical


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