The Comparison of Tramadol, Petedine and Placebo Effects on Peventing Post Oerative Shivering

one of the relatively common complications of anesthesia is shivering which increases the oxygen demand about 100%. This is potentially dangerous for high risk patients. This study evaluated the effect of tramadol, petedine and placebo on preventing post anesthetic shivering. In this double blind study 120 ASA I, II parturient women scheduled for elective caesarian section, divided randomly into petidine (P), Tramadol (T) and placebo (C) groups. Induction and maintenance of anesthesia were the same for three groups. At the end of every operation 1 mg/kg tramadol, 0.5 mg/kg petedine and 2 ml normal saline were injected intravenously for T, P and C group patients respectively. The time of every event, i.e. extubation, recovery from anesthesia (doing sharp action), analgesic request in recovery room and shivering was recorded. the time required for every event i.e. extubation of patient, opening the eyes with command and doing ordinary and sharp acts were the same in three groups. Incidence of shivering and the rate of analgesic request were the same in P(5%&35%) and T(5%&32.5%) groups which were significantly lower than C(40%&67.5%) group (P<0.05). the results of our study revealed that tramadol and petedine prevent post anesthetic shivering and decrease the need for analgesics in recovery room. They have no effects on recovery time. We recommend prophylactic use of tramadol or petidine to prevent the post anesthetic shivering.