Comparative Study between Intrathecal Dexmedetomidine and Intrathecal Magnesium Sulfate for the Prevention of Post-Spinal Anesthesia Shivering in Lower Limb Orthopedic Surgeries: A Randomized Controlled Trial

Abstract

Background: Shivering is a common and unpleasant perioperative event following general as well as neuraxial anesthesia. It has been reported in 40-70% of regionally anesthetized patients. Shivering is a physiological compensatory response to core hypothermia precipitated by anesthetic induced thermoregulatory impairment, exposure to a cool environment, infusion of unwarmed fluids and evaporation from exposed surfaces. However, some shivering like tremors is not thermoregulatory.