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Evaluation of analgesic effects of intrathecal clonidine along with bupivacaine in cesarean section

Author(s): Kothari Nikhil | Bogra Jaishri | Chaudhary Ajay

Journal: Saudi Journal of Anaesthesia
ISSN 1658-354X

Volume: 5;
Issue: 1;
Start page: 31;
Date: 2011;
Original page

Keywords: Cesarean section | intrathecal clonidine | bupivacaine

Aims and Context: The objective of the present study was to evaluate the analgesic and adverse effects of intrathecal clonidine with hyperbaric bupivacaine in spinal anesthesia. Settings and Design : Randomized single blind trial. Methods: 210 ASA I-II pregnant females undergoing emergency cesarean section were randomized in a single-blind fashion to one of the three groups. In group I (n=70) patients received 12.5 mg of 0.5% hyperbaric bupivacaine intrathecally. In group II (n=70) patients received intrathecal mixture of 0.5% hyperbaric bupivacaine (8 mg) and clonidine 50 μg. In group III (n=70) , patients received 0.5% hyperbaric bupivacaine (10 mg) intrathecally along with 50 μg of clonidine. Statistical Analysis Used: Groups were compared using one-way ANOVA with the Bonferroni multiple comparison post hoc test. The proportion of adverse events was compared using the chi-square test (χ2 =57.2410). Results: On adding 50 μg clonidine, we were able to reduce intrathecal dose of bupivacaine for cesarean section to 8 mg. Patients receiving intrathecal clonidine along with bupivacaine had significantly long lasting analgesia with lower bupivacaine dose [246.21±5.15 min. (group II) vs 146.0±4.55 min (group I), P=0.021; 95% confidence interval: 238.01-257.40, group II and 134.99-157.0 group I]. Conclusions: Addition of intrathecal clonidine causes some sedation in the postoperative period, but it provides adequate analgesia and motor paralysis at lower dose of bupivacaine. It also significantly prolongs postoperative pain relief.
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