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Development of a portable system for swallowing evaluation

Research Project

Project/Area Number 12557172
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field 補綴理工系歯学
Research InstitutionHIROSHIMA UNIVERSITY

Principal Investigator

TSUGA Kazuhiro  Hiroshima University, University Dental Hospital, Assistant Professor, 歯学部・附属病院, 講師 (60217289)

Co-Investigator(Kenkyū-buntansha) YOSHIDA Mitsuyoshi  Hiroshima University, Faculty of Dentistry, Research Associate, 歯学部, 助手 (50284211)
SATO Yuuji  Hiroshima University, Faculty of Dentistry, Associate Professor, 歯学部, 助教授 (70187251)
AKAGAWA Yasumasa  Hiroshima University, Faculty of Dentistry, Professor, 歯学部, 教授 (00127599)
HIASA Kyo  Hiroshima University, Faculty of Dentistry, Research Associate, 歯学部, 助手 (60304432)
Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥4,900,000 (Direct Cost: ¥4,900,000)
Fiscal Year 2001: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 2000: ¥2,900,000 (Direct Cost: ¥2,900,000)
Keywordstongue / swallowing / functional evaluation / pressure / movement
Research Abstract

At the oral stage of swallowing, the tongue plays a major role and proper tongue performance is necessary to form the bolus and transfer it to the pharynx. For the present study we developed a system for safe and handy objective estimation of tongue motion and coordination with laryngeal elevation at swallowing.
The device records tongue pressure by means of two strain gauge pressure transducers aligned 20 mm apart on a brass strap placed along the palatal midline. Laryngeal vibration is recorded with piezo-electric acceleration transducers. Time differences between pressure onset at the anterior and posterior transducers and the first spike from laryngeal vibration are measured together with tongue pressure at each transducer.
Thirty healthy subjects were asked to swallow 10 ml of water. Pressure onset at the anterior transducer preceded posterior pressure by 190 ± 101 ms (T1). Laryngeal vibration occurred 437 ± 162 ms after the onset of anterior pressure. For 26 volunteers who gave their informed consent, swallowing was also examined with videofluorography. There was a correlation between T1 and oral transition time evaluated with videofluorography (r_s = 0.494, P = 0.0134).
In conclusion, even the data is limited, the device successfully and easily revealed certain aspects of swallowing function with new parameters for tongue pressure.

Report

(3 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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