Umbrin Naz, Nighat Aziz, Tazmin Haider, Aurangzeb, Parhaizgar Khan.
Isobaric ropivacaine and isobaric bupivacaine in motor blockade during spinal anaesthesia.
J Med Sci Jan ;23(3):121-4.

Objective: To compare the mean duration of motor blockade between 0.5% isobaric ropivicaine and 0.5% isobaric bupivacaine after spinal anaesthesia for lower limb surgery. Material and Methods: This randomized controlled trial study was conducted in main operation theatre of Khyber Teaching Hospital from April 2013 to October 2013. A total of 88 patients were randomly allocated in two groups by lottery method, patients in group A (N=44) received ropivacaine 15 mg of 0.5% and patients in group B (N=44) received 15 mg of 0.5% bupivacaine. Spinal anaesthesia was given after preloading with 1000 ml of lactated ringers. The duration of motor blockade was assessed by modified Bromage scale. Results: There was significant difference between the two groups in the mean-time of duration of motor block. Mean duration of motor blockade in group A was found to be 123.98±9.24 minutes and in group B it was 183.40±11.14 minute. This was clinically and statistically highly significant. Conclusion: Fifteen mg isobaric Ropivacaine provided significantly shorter duration of motor block compared to 15 mg isobaric bupivacaine for lower limb surgeries by spinal anaesthesia.

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