Development of the support system od dysphagic patients using automatic analyzing system of dysphagia
| Project/Area Number |
13470440
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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 | 一般 |
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| Research Field |
Surgical dentistry
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| Research Institution | Showa University |
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Principal Investigator |
TAKAHASHI Koji Showa University, DEPARTMENT OF DENTIST, ASSISTANT PROFESSOR, 歯学部, 講師 (40197140)
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| Co-Investigator(Kenkyū-buntansha) |
MORI Kimie Showa University, DEPARTMENT OF DENTIST, ASSISTANT PROFESSOR, 歯学部, 講師 (20210114)
YAMASHITA Yukari Showa University, DEPARTMENT OF DENTIST, ASSISTANT PROFESSOR, 歯学部, 講師 (50260906)
MICHIWAKI Yukihiro Showa University, DEPARTMENT OF DENTIST, ASSOCIATE PROFESSOR, 歯学部, 助教授 (40157540)
宇山 理紗 昭和大学, 歯学部, 助手 (40307054)
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| Project Period (FY) |
2001 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥7,400,000 (Direct Cost: ¥7,400,000)
Fiscal Year 2003: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 2002: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 2001: ¥4,200,000 (Direct Cost: ¥4,200,000)
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| Keywords | Dysphagia / Cervical auscultation / Swallowing sound / Respiratory sound / Auditory characteristics / Videofluorograph / 頚部聴診法 / 嚥下造影検査 / 客観的評価法 / 音響分析法 |
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| Research Abstract |
This study was designed to establish the objective diagnosing system for dysphagia using the acoustic analyzing techniques of swallowing and expiratory sounds detected from the neck. New detecting instrument with active noise controller was developed. Acquisition system of acoustic signal of swallowing and expiratory sounds combined with the videofluorographic data was also developed. Analyzing system of the acoustic signals consists of the 250 Hz, 500 Hz, one-third octave, and 1 octave band analyses besides the automatically nomalyzing system of input level of the acoustic signals and the moduration transfer function.
In this study, forty-three mixed pre-and post-surgical head and neck cancer patients with informed consent were examined. While patients swallowed 5 ml of barium (180% w/v), the expiratory sounds immediately after the swallows were detected using our method and fed to a VHS video recorder with videofluorographic (VF) images of these swallows and expiratory events.
From the VF data, 92 exiratory sounds were produced after the swallow without aspiration or penetration and 118 exiratory sounds were produced after dysphagic swallows with aspiration or penetration.
Acoustic signals of the expiratory sounds were analyzed by our computed acoustic analyzing system. Comparison of the diagnosis using the critical magnitude from 0 to 250 Hz band of expiratory sound siganals with the VF diagnosis showed significant agreement. Sensitivity was 83.2%, specificity 82.6% and percent agreement was 82.9%.
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Report
(4 results)
Research Products
(1 results)
