Abstract
Objectives: To evaluate the clinical effects of hyperbaric ropivacaine alone and with clonidine or fentanyl for spinal anaesthesia for knee arthroscopy.Methods: Sixty ASA I/II patients were randomised to receive spinal anaesthesia with hyperbaric ropivacaine alone (Group R), or with clonidine 15 μg (Group RC) or fentanyl 30 μg (Group RF). The sensory and motor block, time to micturition and side effects were assessed.Results: The three groups were similar in mean time to onset of sensory block at T10, height of block and time to maximum block. Sensory regression to S2 took longer in Groups RF and RC compared with Group R (p = 0.001 and p < 0.01, respectively). Time to requirement of rescue analgesia was longer in Groups RF and RC compared with Group R (p = 0.023 and 0.002, respectively). Time for complete regression of motor block and time to voiding were longer in group RC compared with group R (p = 0.022 and p = 0.013, respectively).Conclusion: The addition of fentanyl 30 μg to hyperbaric ropivacaine ma...
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