Effect of baricity of intrathecal Bupivacaine on surgical environment in Urological procedures – A Comparative Study

Abstract

A comparative study was done with intrathecal bupivacaine of two different baricities. viz., isobaric 0.25% and hyberbaric 0.50%. The study was done in patients who underwent urological procedures. Surgical environment was compared in both groups. Surgeons were satisfied with surgical environment in both groups. Patients were satisfied with anaesthesia in both the groups. No complications were noted in both groups though all were elderly patients. Isobaric bupivacaine had a slower onset of level of block but produced an intense sensory and motor blockade, like hyperbaric bupivacaine. Height of analgesia and the duration of motor and sensory block were similar between the two groups, probably because the mass of bupivacaine injected was the same. Thus, we conclude that the mass of the drug is more important than the concentration in determining the surgical environment.