Effect of heated humidified ventilation on intraoperative core temperature and prognosis in normothermic thoraco-abdominal aortic aneurysm repair

BACKGROUND: To evaluate whether the heated humidified ventilation can effectively maintain core temperature and improve prognosis in normothermic thoraco-abdominal aortic aneurysm repair surgery. METHODS: Patients who were scheduled for normothermic thoraco-abdominal aortic aneurysm repair surgery were randomized into the group using heated humidified ventilation combined with water blanket and the group using water blanket only. During the operation, the core temperature will be measured every 30 minutes. We analyzed intraoperative core-temperature, coagulation function and in-hospital mortality. RESULTS: HHV&WB group showed lesser decrease in core temperature than WB groups in the first two hours, while WB group had a higher body temperature at the third to fifth hour (2-hour: 35.45±0.47 vs. 35.24±0.59 °C, P=0.284; 5-hour: 35.38±0.70 vs. 35.51±0.88 °C, P=0.664). There was less blood loss, dosage of coagulation drugs and in-hospital mortality (13.33% vs. 20.00%, P=1) in the HHV&WB group. CONCLUSIONS: Heated humidified ventilation can improve the prognosis of normothermic thoraco-abdominal aortic aneurysm repair surgery to some extent, but it can only maintain the core temperature during the first 2 hours.