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European Archives of Oto-Rhino-Laryngology

, Volume 271, Issue 8, pp 2299–2304 | Cite as

Laryngeal sensation and pharyngeal delay time after (chemo)radiotherapy

  • Takashi Maruo
  • Yasushi Fujimoto
  • Kikuko Ozawa
  • Mariko Hiramatsu
  • Atsushi Suzuki
  • Naoki Nishio
  • Tsutomu Nakashima
Head and Neck

Abstract

The objective of the study was to evaluate the association between changes in laryngeal sensation and initiation of swallowing reflex or swallowing function before and after (chemo)radiotherapy. A prospective study was conducted in a tertiary referral university hospital. Thirteen patients who received (chemo)radiotherapy for treatment of laryngeal or hypopharyngeal cancer were included. Laryngeal sensation was evaluated at the tip of the epiglottis before and 1, 3 months, and 1 year after (chemo)radiotherapy. Videofluoroscopy was performed at the same time. Quantitative determinations included changes in laryngeal sensation, computed analysis of pharyngeal delay time, the distance and velocity of hyoid bone movement during the phase of hyoid excursion, and pharyngeal residue rate (the proportion of the bolus that was left as residue in the pharynx at the first swallow). Laryngeal sensation significantly deteriorated 1 month after (chemo)radiotherapy, but there was a tendency to return to pretreatment levels 1 year after treatment. Neither pharyngeal delay time nor displacement of the hyoid bone changed significantly before and after (chemo)radiotherapy. In addition, there was no significant difference in the mean velocity of hyoid bone movement and the amount of stasis in the pharynx at the first swallow before and after (chemo)radiotherapy. After (chemo)radiotherapy, laryngeal sensation deteriorated. But, in this study, videofluoroscopy showed that swallowing reflex and function were maintained.

Keywords

Dysphagia Radiotherapy Laryngeal sensory Initiation of swallowing reflex Pharyngeal delay time 

Notes

Conflict of interest

We do not have a financial relationship with the organization that sponsored the research.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Takashi Maruo
    • 1
  • Yasushi Fujimoto
    • 1
  • Kikuko Ozawa
    • 1
  • Mariko Hiramatsu
    • 1
  • Atsushi Suzuki
    • 1
  • Naoki Nishio
    • 1
  • Tsutomu Nakashima
    • 1
  1. 1.Department of OtorhinolaryngologyNagoya University Graduate School of MedicineNagoyaJapan

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