一是生活不能自理的病人。因长期卧床，排山的尿、汗液易浸透电热芯，很可能因此而发生短路、漏电，以免酿成事故。二是婴幼儿。婴幼儿正处在长身体时期，按体重比例，更需水份。电热毯水份蒸发快，会使婴幼儿失水大增而致咽喉粘膜干燥等脱水症状，降低上呼吸道的抗病能力。三 First, life can not take care of patients. Due to prolonged bed rest, Paoyan urine, sweat easily soaked core, it is likely short-circuit, leakage, so as to avoid accidents. Second, infants and young children. Infants and young children are in long physical period, according to weight ratio, more water. Electric blanket water evaporates quickly, will greatly increase the loss of infants and young children caused by throat mucosal dehydration and other dehydration symptoms, reduce the upper respiratory tract resistance. three