Comparison of plain and hyperbaric solutions of ropivacaine and bupivacaine for spinal anesthesia for major orthopedic surgery [Major ortopedi̇k cerrahi̇ i̇çi̇n spi̇nal anestezi̇de i̇zobari̇k ve hi̇perbari̇k ropi̇vakai̇n ve bupi̇vakai̇ni̇n karşilaştirilmasi]

Objective: in this study aimed to compare efficacy and safety of plain and hyperbaric solution of ropivacaine and bupivacaine for spinal anesthesia in patients undergoing total hip and knee arthroplasty. methods: one hundered twenty patients,in asa grade i-iii group undergoing total hip and knee arthroplasty under spinal anesthesia were included. for patients in group hb 3 ml 0.5% hyperbaric bupivacaine,in group hr 2 ml 0.75% hyperbaric ropivacaine,in group b 3 ml 0.5% plain bupivacaine and in group r 3 ml 0.75% plain ropivacaine were used. the onset and duration of sensory block at dermatome level t10,maximum upper and lower spread of sensory block,the onset insensity and duration of motor block were recorded. results: the mean duration of complete motor block was the least in group hb (p<0.05). onset of sensorial block at dermatome level t10 was the earliest in group hb (p<0.05). onset of sensorial blockage at dermatome level t10 and l1 was the highest in group r and the lowest in group b (p<0.05). need for the first analgesia administration was the earliest in group b and the latest in group r (p<0.05). hypotension after spinal block and intraoperative nausea and vomiting were significantly higher in group hb (p<0.05). intraoperative hypotension was the least in group hr (p<0.05). general anesthesia administration due to inadequate intra-operative analgesia was more frequent in group b (p<0.05). conclusion: glucose addition to ropivacaine during spinal anesthesia limits cephalic spread,increases reliability of anesthesia and also decreases sensorial and motor block duration.