The effects of sour-cold tactile stimulation on saliva swallowing in the elderly requiring long-term care Katsumasa Akieda 1 , Mana Yamori 2 , Yuka Kimura 1 1Department of Rehabilitation, Yamaguchi Prefectural Grand Medical Center 2Program in Health and Welfare, Graduate School of Comprehensive Scientific Research, Prefectural University of Hiroshima Keyword: 冷触刺激 , 酸味冷触刺激 , 唾液嚥下 , 要介護高齢者 , 嚥下リハビリテーション , thermal-tactile stimulation , sour-cold tactile stimulation , saliva swallowing , the elderly requiring long-term care , dysphagia rehabilitation pp.343-350
Published Date 2019/12/15
DOI https://doi.org/10.11477/mf.6001200249
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 The aim of this study was to clarify the effects of sour cold tactile stimulation for saliva swallowing among the elderly who require long-term care.

 59 residents of a long-term care welfare facility for the elderly participated in this study. Their levels of ADL were full independence: 1 subject, independence indoors only: 22 subjects, wheelchair life: 22 subjects, bed ridden: 14 subjects. 42.4%(25 subjects) of them were stroke survivors, and 37.3%(22 subjects) were the patients of dementing illness. We measured their latency of the first saliva swallow, the frequency of saliva swallowing and the amount of saliva for a 10 minute-period under the condition: without stimulation, with cold tactile stimulation or sour cold tactile stimulation. The latency was shortened and the frequency increased with sour cold tactile stimulation significantly in both the stroke and dementia group. We therefore consider that sour cold tactile stimulation could activate the swallowing nerve system sustainably. Sour cold tactile stimulation can be easily, safely and widely applicable for indirect therapy technique because it does not need oral intake of real foods or liquids. It could be very effective for the elderly requiring long-term care to prevent saliva pooling and aspiration pneumonia due to overflowed saliva and/or residual bolus.

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