Objectives: The goal of this study is to assess hyperbaric bupivacaine and the time which the patients have been kept in lateral positions during the ureteral cobble, kidney calculus operation. Methods: A prospective, randomized and controlled study was conducted on 168 adult, age: 1565 patients of ASA 1,2 undergoing surgery in taking out the ureteral cobble, kidney calculus. Patients were anesthesied at L2-L3 positions, middle lines at the lateral position and divided into 4 groups (n = 42). Group 1: 7mg of 0,5 percent hyperbaric bupivacaine solution. Group 11: 9mg of 0,5 percent hyperbaric bupivacaine solution Group a: Patients were kept in lateral positions after spinal anaesthesia for 5 minutes. Group b: Patients were kept in lateral positions after spinal anaesthesia for 10 minutes. Spinal block was assessed by prinprick and modified Bromage scale, side effects were also evaluated and compared among the groups. Results: The rate of unilateral and sensable block (surgery position) at group b has been higher than group a, which has statistical meaning. The sideeffects at grpup a has met much more than group b. Conclusions: For unilateral spinal anaesthesia in the ureteral cobble, kidney calculus operations, 7mg 0.5 percent hyperbaric bupivacaine solution for taking out the ureteral cobble and 9mg 0.5 percent hyperbaric bupivacaine solution for taking out the kidney calculus and keeping the patinets for 10 min in the lateral decubitus position were found to be appropriate.
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