Physical Signs of Dehydration in the Elderly
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- Shimizu Miyuki
- Terumo Corporation R&D Headquarters, Japan
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- Kinoshita Kensuke
- Department of Medicine, Mito Kyodo General Hospital, University of Tsukuba, Japan
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- Hattori Kazuya
- Department of Medicine, Mito Kyodo General Hospital, University of Tsukuba, Japan
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- Ota Yoshio
- Department of Medicine, Mito Kyodo General Hospital, University of Tsukuba, Japan
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- Kanai Takao
- Department of Medicine, Mito Kyodo General Hospital, University of Tsukuba, Japan
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- Kobayashi Hiroyuki
- Department of Medicine, Mito Kyodo General Hospital, University of Tsukuba, Japan
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- Tokuda Yasuharu
- Department of Medicine, Mito Kyodo General Hospital, University of Tsukuba, Japan
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Description
Objective Dehydration is a common condition and frequent cause of hospitalization in older people, despite the caregiver's high attention in attempt to avoid its occurrence. In this study, various physical signs were examined as clinical signs of dehydration in elderly.<br> Methods A prospective observational study was conducted in an acute care teaching hospital. Consecutive elderly patients who were admitted to the Department of Medicine were evaluated. Dehydration was defined as a calculated serum osmolality above 295 mOsm/L. The patients diagnosed as dehydrated or not dehydrated were observed for physical signs of dehydration. Data of blood and urine chemistry analysis were also compared between the two groups.<br> Results A total of 27 elderly patients admitted with acute medical conditions were included in this study. For the physical signs, dry axilla had moderate sensitivity (44%) and excellent specificity (89%) to detect dehydration. Sunken eyes and delayed capillary refill time also showed relatively good specificity (83%). For laboratory data, the mean concentrations of serum sodium of the dehydrated group (146 mEq/L) was significantly higher (p<0.01) than those of the non-dehydrated group (134 mEq/L).<br> Conclusion Physical signs of dehydration in elderly showed relatively good specificity but poor sensitivity. The evaluation of the axillary moisture could help assess dehydration as well as laboratory data analysis such as serum sodium concentration.<br>
Journal
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- Internal Medicine
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Internal Medicine 51 (10), 1207-1210, 2012
The Japanese Society of Internal Medicine
