| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Outline of Final Research Achievements |
Sudden, bath-related deaths occur frequently in Japan, particularly among elderly people in the winter. We discovered the pathophysiological mechanisms involved epidemiologically. In Osaka City, 2,063 bathtub-related fatal accidents occurred from 2011 to 2015, 89.4% at home, 6.6% in the public baths, 1.3% at hotel, only 0.4% at nursing care institutions. Among 8 fatal cases at institutions, 1 died due to diseases and 7 died due to heatstroke in one-person bathing possibly.
When the elderly have full immersion baths in 41 ℃ for 30 minutes, they may develop heat stroke and lose consciousness with just a 3 ℃ elevation of the core body temperature. Furthermore, when the core body temperature exceeds 40 ℃, patients may lose consciousness and drown. When the core temperature exceeds 42 ℃, patients will die suddenly from hyperkalemia with ventricular fibrillation. Now we can explain the findings of the forensic autopsies of bath-related deaths with this mechanism.
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