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| - Effect of tropisetron on vomiting during patient-controlled analgesia in children.
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| - Patient-controlled analgesia (PCA) is associated with a high incidence of vomiting which is distressing and interferes with postoperative recovery. Tropisetron, a long-acting selective 5-HT3 receptor antagonist, has been shown to be effective in preventing nausea and vomiting associated with PCA use in adults and chemotherapy in children. We assessed the efficacy of prophylactic intraoperative administration of tropisetron on the incidence of vomiting in children using morphine PCA. We studied 58 patients, allocated randomly to receive tropisetron 0.1 mg kg-1 to a maximum of 5 mg, or normal saline. Children who received tropisetron had an incidence of vomiting during the first 24 h after operation of 22% compared with 66% in the control group (P = 0.001). In addition, the severity of vomiting was less in the tropisetron group with only one child (4%) vomiting more than twice compared with nine (31%) in the control group (P = 0.01). We conclude that tropisetron is efficacious in reducing the incidence and severity of postoperative vomiting in children using PCA.
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