2001 Fiscal Year Final Research Report Summary
Development of a portable system for swallowing evaluation
| Project/Area Number |
12557172
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
補綴理工系歯学
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| Research Institution | HIROSHIMA UNIVERSITY |
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Principal Investigator |
TSUGA Kazuhiro Hiroshima University, University Dental Hospital, Assistant Professor, 歯学部・附属病院, 講師 (60217289)
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| 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)
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| Project Period (FY) |
2000 – 2001
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| Keywords | tongue / swallowing / functional evaluation / pressure / movement |
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| 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.
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