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自制循环式降温机主要用水泵将冷水输送到特制的“冰帽”式双侧“腋盒”与双侧“腹股沟盒”内，利用温度传热原理，达到降温的目的。该机降温冷容量大，作用持久而恒定，工作时间长，不需更换冰源，降温效果可靠，降温程度及速度可人为控制，操作简单，使用方便，一经开机，可按程序设计自选工作。无需专人照管，不需更换冰源，不会污染床单位，不用翻动病人，不影响治疗，减轻护理人员繁琐的工作负担，解决了传统物理降温法的不足。经济适用，降温效果优良，患者感觉舒适，易于接受，为高热病人尤其是不明病因的高热病人，中、晚期肿瘤病人持续性高热时或顽固性高热病人解决了药物难以解决的疾苦，无副作用。
The self-made circulating cooling machine mainly uses the water pump to deliver the cold water to the special “ice cap” type double side “cassette box” and the double side “groin box”, and uses the principle of temperature and heat transfer to achieve the purpose of cooling. The machine has large cooling and cold capacity, long-lasting and constant effect, long working hours, no need to replace the ice source, reliable cooling effect, and the degree and speed of cooling can be controlled manually. The operation is simple and easy to use. Once it is turned on, it can be designed according to the program. There is no need for special care, no need to change the ice source, no pollution to the bed unit, no need to turn over the patient, no impact on treatment, and reduce the cumbersome work load of the nursing staff, thus solving the deficiencies of the traditional physical cooling method. It is economical and applicable, with excellent cooling effect. The patient feels comfortable and is easy to accept. It solves the difficult problems of the drug and has no side effects for patients with high fever, especially those with high fever with unknown causes, and with persistently high fever in middle and late stage cancer patients or refractory high fever patients.