Davis F M, Parimelazhagan K N, Harris E A
Br J Anaesth. 1977 Nov;49(11):1127-32. doi: 10.1093/bja/49.11.1127.
In six patients undergoing coronary vein graft operations under cardiopulmonary bypass and hypothermia, the temperatures of arterial and mixed-venous blood, nosopharynx, oesophagus, liver, rectum, deltoid and vastus lateralis muscles and 10 skin sites were recorded. Whole-body oxygen consumption was measured before cooling and twice during hypothermia. On average, a patient lost 1000 kJ of heat by the end of hypothermia, of which 84% was lost to the heat-exchanger and pump circuit. Evaporative and convective loss amounted to 380 kJ, while the patient's metabolism supplied 220 kJ. During rewarming, the pump returned 670 kJ to the patient. Nasopharyngeal temperature reflected accurately venous, oesophageal and hepatic temperatures in the steady state; however, it was slow to reflect changes. Compared with other sites, muscle remains warmer during hypothermia and cooler after rewarming.
在6例接受体外循环和低温下冠状动脉静脉移植手术的患者中，记录了动脉血和混合静脉血、鼻咽、食管、肝脏、直肠、三角肌和股外侧肌以及10个皮肤部位的温度。在降温前和低温期间测量了两次全身耗氧量。平均而言，到低温结束时，一名患者损失了1000千焦的热量，其中84% 损失给了热交换器和泵循环。蒸发和对流损失达380千焦，而患者的新陈代谢提供了220千焦。在复温过程中，泵向患者返回了670千焦。在稳定状态下，鼻咽温度准确反映了静脉、食管和肝脏温度; 然而，它反映变化的速度较慢。与其他部位相比，肌肉在低温期间保持温暖，复温后保持凉爽。
