The Effect of Preoperative Warming on Postoperative Hypothermia

Inclusion Criteria: * Patients aged 50-85 years undergoing general anesthesia for TURP surgery * ASA physical status I and III patients * Body mass index between 15 and 36 kg/m2 * General anesthesia time is 30-90 minutes Exclusion Criteria: * without written consent, * inadequate Turkish comprehension, * known impaired thermoregulation or thyroid disorders, * severe hypertension (systolic blood pressure \[SBP\]\>180 mmHg or diastolic blood pressure \[DBP\] \> 110 mmHg in the operating suite admission), * an angiotensin-converting enzyme inhibitor/angiotensin II receptor antagonist on the day of surgery, * secondary hypertension (e.g., renal artery stenosis, pheochromocytoma, Cushing's syndrome), * vascular disease, * poor cutaneous perfusion, * serious skin lesions * baseline temperature ≥37.5°C (degrees centigrade)