Comparing the effects of levobupivacaine and bupivacaine in anorectal surgery under saddle spinal anesthesia

İn this study; we aimed at investigating the effects of equipotent doses of hyperbaric bupivacaine and hyperbaric levobupivacaine in outpatient anorectal surgery under saddle block.Sixty patients between the age of 18- 50 and in the risk group of ASA I-II included in the study. 7,5 mg of 0,5% hyperbaric bupivacaine or 7,5 mg of 0,5% hyperbaric levobupivacaine injected into the intrathecal space in sitting position through L4-L5 or L5-S1 intervertebral space in 30 seconds. All patients kept in sitting position for 5 minutes with aid after intrathecal injection and than layed in supine position, finally they positioned in prone jack-knife. Hemodynamic parameters like NIBP, HR, SpO2, sensory and motor block characteristics, duration of analgesia, time of first voiding, mobilization time, patient and surgeon satisfaction, adverse effects and discharge time were recorded during and after surgery.We found that sensory and motor block duration with hyperbaric levobupivacaine was shorter than hyperbaric bupivacaine. The difference was statistically sagnificiant but did not affect the discharge times in outpatient anorectal surgery. The first voiding times were similar in both groups and caused delaying of discharge times. We suggested sucessfully that hemodynamic parameters would be in normal limits with saddle block. The adverse effects caused by induced vazovagal reflex due to emotional stress considered us the necessity of premedication.İn conclusion we saw that saddle block in appropriate patients under going anorectal surgery was a technique that easy to administrate and with minimal side effects. We found that hyperbaric levobupivacaine may be a favourable alternative to hyperbaric bupivacaine in anorectal surgery under saddle block. We are in opinion that there is a need of further studies using lower doses of hyperbaric levobupivacaine that can get adequate anesthesia for surgery and causing no delay in discharge times.