Suzuki Masaru, Ikaga Toshiharu, Hori Shingo
Department of Emergency and Critical Care Medicine, Keio University School of Medicine, Japan.
Faculty of Science and Technology, Keio University, Japan.
Intern Med. 2017 Dec 1;56(23):3173-3177. doi: 10.2169/internalmedicine.9156-17. Epub 2017 Oct 11.
Objective Bath-related sudden cardiac arrests occur frequently in Japan. Although previous studies have reported that most fatal events occurr in winter, the reason why such events exhibit a seasonal variation has not been elucidated. In this study, we hypothesized that the occurrence of bath-related deaths was correlated with a low air temperature. Methods This prospective cross-sectional observational study was conducted in the Tokyo Metropolitan area between October 2012 and March 2013. Data were collected for all cases involving the activation of the emergency medical system because of an accident or acute illness related to bathing that occurred in Tokyo during the study period. In particular, elderly (≥65 years) cardiac arrest victims who had been found in a bathtub filled with water were enrolled. The relationship between the daily number of cardiac arrest events and the lowest daily air temperature in Tokyo was studied using a nonlinear regression model. Results A total of 3,624 bath-related events were registered in this study. Among these events, 1,081 deaths of elderly individuals who had been found in a bathtub filled with water were recorded. A close correlation was observed between the daily number of events and the lowest daily air temperature. This correlation was described by the following equation: y=8.38e, where y was the daily number of cardiac arrests and x was the lowest daily air temperature. Conclusion A low air temperature was closely correlated with the occurrence of bath-related cardiac arrest.
目的 在日本，与沐浴相关的心脏骤停事件频繁发生。尽管先前的研究报告称大多数致命事件发生在冬季，但此类事件呈现季节性变化的原因尚未阐明。在本研究中，我们假设与沐浴相关的死亡事件的发生与气温较低有关。方法 这项前瞻性横断面观察性研究于2012年10月至2013年3月在东京都地区进行。收集了研究期间在东京因与沐浴相关的事故或急性疾病而启动紧急医疗系统的所有病例的数据。特别是，纳入了在装满水的浴缸中被发现的老年（≥65岁）心脏骤停受害者。使用非线性回归模型研究了东京心脏骤停事件的每日数量与每日最低气温之间的关系。结果 本研究共记录了3624起与沐浴相关的事件。在这些事件中，记录了1081例在装满水的浴缸中被发现的老年人死亡病例。观察到事件的每日数量与每日最低气温之间存在密切相关性。这种相关性由以下方程描述：y = 8.38e，其中y是心脏骤停的每日数量，x是每日最低气温。结论 低气温与与沐浴相关的心脏骤停的发生密切相关。
