مقایسه اثر محلول های رینگر لاکتات و هیدروکسی اتیل استارچ 6درصد بر برون ده قلب پس از بی حسی نخاعی

Background and aims: Spinal anesthesia induced hypotension is common and it could beserious and life threatening. Occasionally many types of solutions use for prevention. Wecompared ringer lacatated (RL) vs Hetastarch (HS) about cardiac output reductions.Methods and materials: This is a randomized clinical trial which has done on 60 lowerextremity orthopedic patients who went under surgery whereas spinal anesthesia has done forthem. We used from electrovelosimetery for our evaluations.Results: Base line heart rate, systolic and diastolic blood pressure and cardiac output weresimilar in both groups. whereas they were apparently reduced in ringer lactated group.Conclusion: This study showed effectiveness of hetastarch 6% in preventing of hemodynamicparameters changes in patients undergoing spinal anesthesia in comparison with ringer lactatedsolutions.