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Clinical Trial
Journal Article
Randomized Controlled Trial
Analgesic effects of intrathecal neostigmine in perianal surgery.
European Journal of Anaesthesiology 2003 May
BACKGROUND AND OBJECTIVE: In recent human and animal studies, intrathecal administration of various doses of neostigmine produces analgesia without neurotoxicity. The aim was to examine the effects of intrathecal neostigmine and bupivacaine in patients undergoing perianal surgery under spinal anaesthesia.
METHODS: The patients were randomly allocated into three groups of 15: Group 1 (controls) received hyperbaric bupivacaine 10 mg + dextrose 5%, 1 mL, to a total volume of 3 mL; Group 2 received hyperbaric bupivacaine 10 mg + neostigmine 25 microg in dextrose 5%, 1 mL, to a total volume of 3 mL; and Group 3 received hyperbaric bupivacaine 10 mg + neostigmine 50 microg in dextrose 5%, 1 mL, to a total volume of 3 mL.
RESULTS: The onset of sensory block was significantly earlier for Group 2 and 3 patients compared with Group 1 patients (P < 0.05). The full time to recovery of motor block and sensory block was significantly longer in Group 3 compared with Group 1 (P < 0.05). In Group 3, the average time until the first dose of tramadol was longer than Group 1 (P < 0.05). The incidence rate of nausea and vomiting was significantly higher in Groups 2 and 3 than in Group 1 (P < 0.05).
CONCLUSIONS: The use of intrathecal neostigmine as an analgesic drug in perianal surgery is unsatisfactory because of prolonged motor blockade and nausea.
METHODS: The patients were randomly allocated into three groups of 15: Group 1 (controls) received hyperbaric bupivacaine 10 mg + dextrose 5%, 1 mL, to a total volume of 3 mL; Group 2 received hyperbaric bupivacaine 10 mg + neostigmine 25 microg in dextrose 5%, 1 mL, to a total volume of 3 mL; and Group 3 received hyperbaric bupivacaine 10 mg + neostigmine 50 microg in dextrose 5%, 1 mL, to a total volume of 3 mL.
RESULTS: The onset of sensory block was significantly earlier for Group 2 and 3 patients compared with Group 1 patients (P < 0.05). The full time to recovery of motor block and sensory block was significantly longer in Group 3 compared with Group 1 (P < 0.05). In Group 3, the average time until the first dose of tramadol was longer than Group 1 (P < 0.05). The incidence rate of nausea and vomiting was significantly higher in Groups 2 and 3 than in Group 1 (P < 0.05).
CONCLUSIONS: The use of intrathecal neostigmine as an analgesic drug in perianal surgery is unsatisfactory because of prolonged motor blockade and nausea.
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