Jokinen E, Välimäki I, Antila K, Seppänen A, Tuominen J
Cardiorespiratory Research Unit, University of Turku, Finland.
Pediatrics. 1990 Aug;86(2):282-8.
Children's circulatory adjustment to a 10-minute heat stress in a climatic chamber was studied in 61 children and 20 adolescents and young adults. The thermal conditions corresponded to those of an ordinary Finnish sauna bath. In all subjects the rectal temperature and heart rate increased during the heat exposure (P less than .001). Systolic and diastolic blood pressures remained unchanged in sauna, but the systolic and especially the diastolic blood pressure decreased (P less than .001) in children less than 10 years of age immediately after the heat exposure; two vasovagal collapses developed. Cardiac output increased in all but the less than 5-year-old children (P less than .001). This was due to a significant decrease in stroke volume (32.9%) (P less than .001) in children less than 5 years old. Stroke volume declined slightly even in the older subjects. These changes indicate that the Finnish sauna bath puts great demands on a child's circulatory regulation. To avoid possible cardiovascular side effects, particularly small children should be supervised carefully during sauna bathing.
对61名儿童以及20名青少年和青年成人在气候舱中10分钟热应激下的循环调节情况进行了研究。热环境条件与普通芬兰桑拿浴的条件相当。在所有受试者中，热暴露期间直肠温度和心率均升高（P＜0.001）。桑拿期间收缩压和舒张压保持不变，但10岁以下儿童在热暴露后即刻收缩压尤其是舒张压下降（P＜0.001）；出现了2次血管迷走性虚脱。除5岁以下儿童外，所有受试者的心输出量均增加（P＜0.001）。这是由于5岁以下儿童的每搏输出量显著下降（32.9%）（P＜0.001）。即使在年龄较大的受试者中，每搏输出量也略有下降。这些变化表明芬兰桑拿浴对儿童的循环调节要求很高。为避免可能的心血管副作用，尤其是幼儿在桑拿浴期间应受到仔细监护。
