Comparison of the effects of prophylactic prehydration or ephedrine administration for spinal anesthesia on hemodynamic parameters and QT interval [Spi̇nal anestezi̇de profi̇lakti̇k prehi̇drasyon ve efedri̇n uygulamalarinin hemodi̇nami̇k parametreler i̇le QT i̇ntervali̇ üzeri̇ne etki̇leri̇ni̇n karşilaştirilmasi]

Objective: to prevent spinal anesthesia induced hypotension,the effects of intravenous ephedrine and colloid prehydration on the hemodynamic parameters and qtc interval were compared. method: after ethic committee approval,asa i-ii,60 patients scheduled for arthroscopic knee surgery were randomly allocated into two groups. before and after the anesthesia,blood pressures and heart rates were recorded. ecg recordings were used to measure the qtc intervals. in group k,prehydration was performed with 500 ml 6% hes before spinal anesthesia. in group e,ephedrin 15 mg iv was administered after spinal anesthesia. five mg bolus ephendine was applied in case of hypotension. results: the blood pressures,heart rates and hypotension incidence were similar among the groups (p>0.05). qtc intervals of both groups were extended after the spinal anesthesia (p<0.001),but the differences were not significant among the groups (p>0.05). although intraoperative and postoperative intravenous fluid was similar in both groups (p>0.05),the first voiding time was earlier in group k than group e (p<0.01). conclusion: the effects of prehydration with colloid and intravenous ephedrine for spinal anesthesia-induced hypotension have similar effect on hemodynamic parameters and qtc interval. both methods could be performed depending on the patient's clinic and preference of the anesthesiologist.