Preoperative hypothermia, which is one of the problems frequently experienced by patients, during surgical interventions individual and environmental . It develops as a result of the deterioration of the temperature regulation mechanism due to factors such as exposure of tissues and organs, etc. Body temperature is a vital sign, which is regulated by the hypothalamic thermoregulatory center with physical and chemical systems and accepted within normal limits between 36-37.7°C. Hypothermia is defined by the American Association of Perianesthesia Nurses as 36°C below the central temperature. Body temperature between 34-36°C is classified as mild hypothermia, 32-34°C as moderate hypothermia, and below 32°C as severe hypothermia . Hypothermia, which is defined as a decrease in body temperature below 36°C is common in the preoperative period. is a common problem. A decrease in body temperature below 36 °C one hour before anesthesia and up to 24 hours after anesthesia is defined as "preoperative hypothermia". In general, hypothermia is a complication that can affect the length of hospital stay, wound healing, and patient satisfaction.Total hip replacement is surgery to replace a severely damaged hip with an artificial joint. Total hip replacement is a surgical treatment method applied in advanced ages for degenerative joint disease, rheumatoid arthritis, femoral neck fracture and developmental hip dislocation. The aim of total hip replacement is to relieve hip pain, to regain the diminished function of the joint by increasing the range of motion, and to improve the quality of life . Total hip replacement is also applied to young patients with severely damaged and painful hip joints . Patients at high risk of developing hypothermia under anesthesia; being female, patients with a preoperative body temperature below 36°C, patients undergoing sedation and premedication, patients who will undergo major and moderate surgery, patients with concomitant cardiovascular disease, patients undergoing general anesthesia, those over 70 years of age patients, those with systolic blood pressure above 140 mmHg, those with diseases such as heart disease, hypothyroidism, brain tumor, adrenal insufficiency, chronic kidney failure, diabetes mellitus, except for surgical pathology, those with anemia, those with a body mass index below 25 , trauma and burn patients are at risk for hypothermia . Major (neurosurgery, prosthetic surgery, thoracic surgery, etc.) and long-term (\> 2 hours) surgical interventions, opening large body spaces, application of cold fluids, blood and blood products, cold and dry anesthetic gases, excessive irrigation, excessive irrigation loss of fluid and blood, lack of muscle movements in the patient, the patient being naked and immobile, wide body surfaces remaining open, and wet dressings cause hypothermia development during surgical intervention . In addition, the likelihood of hypothermia increases with aging. Total hip replacement surgery, which is frequently performed in the elderly due to rheumatoid arthritis, osteoarthritis, osteoporosis, problems affecting the spinal cord and serious extremity injuries is a major intervention and includes many of the risks mentioned for hypothermia. Nurses have a great responsibility in ensuring and maintaining temperature control in the surgical process. Nurses can reduce the development of hypothermia by using active and passive warming methods to maintain the patient's normal body temperature in the preoperative period . Surgical nurses should evaluate and record the hypothermia risk factors, signs and symptoms before the operation, closely monitor the body temperature of the patients, determine and apply appropriate warming methods according to body temperature. In a study by Grossman, it was determined that patients who used heating method in the postoperative period reached their normal body temperature in a shorter time than patients who were not warmed .The mean body temperature of the patients after two hours of warming before surgery was found to be 36.4°C . Kurşun and Dramalı (2011) determined that the patients who were warmed in the postoperative period reached their normal body temperature in a shorter time than the patients who were not heated. Active and passive warming methods are used in the control of hypothermia in surgical patients. In active heating methods, heat is given to the patient by one or more of the ways of external conduction, radiation, and convection. These; are external and internal heating methods. In the external heating method, the heat is given to the patient's skin with active cutaneous heaters. warm socks; In the pre-operative period, wearing pre-warmeḑ stockings has proven effective in maintaining core body temperature, controlling shivering response, and providing patients' subjective thermal comfort. Pre-warmed stockings are a noninvasive, easy-to-wear, painless, and cost-effective method of preventing heat loss. Allows efficient repositioning of the patient and surgical preparation. It also provides comfort to patients, reduces preoperative anxiety and can be applied without a doctor's prescription . The lack of comprehensive studies examining the effect of preoperative active warming on maintaining body temperature during and after surgery and the possibility of explaining the effect of warm socks on maintaining body temperature, warmeḑ socks; It is seen that it strengthens the central temperature regulation system and ultimately maintains core body temperature and can control the shivering response, thus maintaining subjective thermal comfort. The lack of comprehensive studies examining the effect of preoperative active warming on maintaining body temperature during and after surgery and the fact that patients who experienced. Total hip replacement were in the high risk group for hypothermia formed the basis of this study. In the light of all information, in this study, it was aimed to determine the effectiveness of warm stockings, which is one of the active heating methods in prevention, and to contribute to the literature by drawing attention to the risk of hypothermia in patients experiencing.