Comparison Of Two Active Warming Methods To Prevent Inadvertent Perioperative Hypothermia In Patient During Video-assisted Thoracic Surgery

Intraoperative hypothermia is a common event during video-assisted thoracic surgeries.Intraoperative hypothermia may PH leads to intraoperative blood loss,cardiac events,SSI,an increase in hospital stay and associated costs.Forced air warming(FAW)and resistive heating(RH)are the most two commonly used and widely studied methods based on recent publications.The effectiveness of the two warming systems varies among different surgeries,but by far there are seldom research to comparethe two warming methods in patient during video-assisted thoracic surgeries.ObjectiveTo investigate the effects of resistive warming and force air warming in patient during video-assisted thoracic surgeries.MethodsA total of 72 patients undergoing video assisted thoracic surgery were recruited and randomly allocated to receive either force-air warming orresistive heating.Patient core temperatures were monitored by a temperature-sensing bladder catheter continuously during the operation,the temperature after the intubation,start of the surgery,30 min after the skin incision,60 min after the skin incision,90 min after the skin incision,120 min after the skin incision,end of the surgery were recorded.IPH was defined as the core temperature was below 36?.In addition,time of the surgeries,perioperative adverse complication such as increased bleeding,surgical site infection,chills were recorded.ResultsThe average temperature during the during the surgery was above36?;the temperature in the resistive heating group were higher than the force-air group,which the difference was statistically significant(F =22.962,P <0.001;F=14.617,P <0.001;F=6.332,P <0.05)when start of the surgery,30 min after the skin incision and60 min after the skin incision;There was no statistically significant difference(P>0.05)effects of warming between the two groups when patients were moved into the operation room and from 1 hour after the start of the surgery to the end of the surgery.there was no significant difference in the temperature changes between the two groups from 1 hour after the skin incision to the end of the surgery.ConclusionsOur results suggests that resistive heating is as effective as forced-airwarming in preventing postoperative hypothermia during video-assisted thoracic surgery,the resistive heating mattresses may be an alterative to force-air warming.