Effect of Preoperative Active Warming and Passive Warming Methods on Perioperative Hypothermia

70% of surgical interventions are abdominal surgeries. Open abdominal surgery is performed in patients for whom minimally invasive approaches are not suitable. In these surgeries in which general anesthesia is used, the duration of the operation is longer, complications are more frequent, and postoperative recovery occurs later. Low body temperature before surgery, preoperative fasting and fluid deprivation before anesthesia, exposure of large body surface areas, evaporative heat loss during skin preparation using volatile solutions, large open cavity or abdominal surgery longer operative time and exposure to anesthesia, during surgical intervention excessive blood loss etc. surgical intervention poses a risk for the formation of undesirable hypothermia. Cardiovascular and respiratory system problems that may increase mortality due to hypothermia in surgical patients; may cause a decrease in heart rhythm, cardiac output, blood pressure and oxygen saturation, and an increased risk of cardiac arrest and ischemia. With the development of shivering, oxygen consumption increases and the \"thermal comfort\" of the patient deteriorates. The length of stay in the postoperative unit and hospital stay are prolonged, causing an increase in costs. Among the rapid recovery protocols, it is recommended to pre-warm the patients in the preoperative period to maintain normothermia. Many complications are prevented by different methods and warming procedures performed in the perioperative period. In our study, it was aimed to compare the effects of active and passive warming on hypothermia, vital signs and warmth comfort in the postoperative period in patients who will undergo open abdominal surgery.