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Τρίτη 7 Αυγούστου 2018

Dexmedetomidine infusion versus placebo for analgesia and prevention of emergence agitation in morbidly obese patients undergoing laparoscopic sleeve gastrectomy

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Mostafa M Hussein, Raham H Mostafa

Ain-Shams Journal of Anaesthesiology 2017 10(1):207-212

Background Emergence agitation (EA) can occur following recovery from general anesthesia. The patient may exhibit aggressive behavior, disorientation, agitation, and restlessness. If untreated, this complication may result in significant morbidity. EA has been poorly investigated in patients undergoing laparoscopic sleeve gastrectomy. Aim The aim was to assess the efficacy of perioperative dexmedetomidine infusion on EA and quality of recovery after elective laparoscopic sleeve gastrectomy in morbidly obese adult patients. Materials and methods A total of 60 patients undergoing laparoscopic sleeve gastrectomy were randomized into two groups (30 patients each). The dexmedetomidine group (group D, N=30) received dexmedetomidine infusion, whereas the control group (group C, N=30) received normal saline in the same volume and rate as placebo. Propofol, fentanyl, and atracurium were used for induction of anesthesia, and isoflurane was used for maintenance of anesthesia. Postoperative hemodynamic variables, postoperative pain, the need for 'rescue' analgesics and antiemetics, and the incidence of agitation were recorded up to 2 h postoperatively. Pain was evaluated using the visual analog scale score in the postanesthesia care unit on arrival, at 5 min, and then every 15 min for 120 min. EA was evaluated at the same time intervals by Richmond agitation-sedation scale (RASS). Pethidine 50 mg intravenously was given for pain (if pain score >4) or severe agitation (RASS score >+1). Results No patients in group D experienced postoperative EA during the second hour postoperatively (RASS ˂1). On the contrary, RASS scores of patients in group C were 2 (2–3) on arrival to postanesthesia care unit and greater than +1 during the remaining time up to 2 h postoperatively, indicating postoperative EA. In group C, 25 (92.5%) patients required rescue analgesia compared with only five (18.5%) patients in group D. Hemodynamic parameters were stable in group D. Conclusion Dexmedetomidine infusion during laparoscopic sleeve gastrectomy for morbidly obese patients is beneficial and effective in preventing postoperative pain and postoperative EA.

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