comparative study between isobaric and hyperbaric subarachnoid block for hip surgery

ABSTRACT

Isobaric bupivacaine or hyperbaric cinchocaine was injected intrathecally in two groups of 30 patients each. Group I received hyperbaric cinchocaine 1.5 ml, group II received isobaric bupivacaine 3.5 ml. These patients were operated upon for hip surgery. The time of onset of analgesia was slightly less in group I than in group II. After subarachnoid analgesia, changes in heart rate, degree of hypotension and respiratory rate were similar. The longer duration of action of bupivacaine was advantageous in the recovery period, resulting in significant reduction in the requirement of post-operative doses of analgesia. Isobaric bupivacainc proved a better local anaesthetic agent for spinal analgesia for hip surgery