This study compare effect of using survival thermal blanket and draping fabric as substitute for perforated blanket to reduce the incidence of inadvertent perioperative hypothermia in geriatric patients.

Study design was randomized single blinded. Total of 126 geriatric subjects from March-April 2021 were allocated into survival thermal blanket group (n=63) dan draping fabric group (n=63). Preinduction temperature was measured using timpanic membrane termometer. Intraoperatively, temperature is measured using nasopharynx.Study design was randomized single blinded. Total of 126 geriatric subjects from March-April 2021 were allocated into survival thermal blanket group (n=63) dan draping fabric group (n=63). Preinduction temperature was measured using timpanic membrane termometer. Intraoperatively, temperature is measured using nasopharynx.

Inclusion Criteria:

• Age > 60 years old
• Physical status ASA 1-3
• Undergo elective surgery under general anesthesia with or without regional anesthesia

Exclusion Criteria:

• Thermoregulation disturbance
• Abnormal thyroid function
• Fever caused by infectious disease in 7 days prior to surgery
• Pre-induction hypothermia with temperature below 36 degree
• On routine antipiretic
• Unstable hemodynamic preoperative and intraoperative