JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL
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Prevention of Emergence Agitation with Ketamine in Rhinoplasty.

BACKGROUND: Emergence agitation (EA), defined as restlessness, disorientation, excitation, and/or inconsolable crying, is a common phenomenon during early recovery from general anesthesia. In this study, we aimed to determine the (1) EA incidence after rhinoplasty operations in adults; (2) the effects of ketamine administered at sub-anesthetic doses just 20 min before the end of the surgery in rhinoplasty operations on agitation level, postoperative pain, side effects, and complications; and (3) to determine the risk factors for EA in adults after rhinoplasty.

MATERIALS AND METHODS: Totally 140 patients scheduled to undergo elective rhinoplasty were enrolled in this prospective study. Patients were equally and randomly divided into two groups: saline group (control group) (n = 70) and ketamine group (n = 70). Twenty minutes before surgery completion, 1 ml saline was administered via the intravenous (i.v.) route to the saline group, while 0.5 mg/kg ketamine was administered via i.v. patients in the ketamine group. The emergence agitation level of the patients was evaluated using the Richmond Agitation-Sedation Scale just after extubation and in the post-anesthesia care unit (PACU). For postoperative pain evaluation, the Numerical Rating Scale (NRS) was scored (from 0 to 10) every 10 min until the patients were discharged from PACU.

RESULTS: EA incidence in the control group was as high as 54.3%, while in the ketamine group it was 8.6% just after extubation (p < 0.001). In the PACU, EA incidence was 28.6% in the control group, while none of the patients had EA in the PACU in the ketamine group (p < 0.001). Male gender, severe pain (NRS ≥ 5), and smoking were defined as significant risk factors for EA both after extubation and during follow-ups in the PACU (p < 0.001).

CONCLUSIONS: Emergence agitation after rhinoplasty is a common complication, likely disturbing operative outcomes in adults. Ketamine at sub-anesthetic doses is highly effective in preventing EA. Further, larger-scale prospective studies are warranted to determine preventive measures for EA development in rhinoplasty.

LEVEL OF EVIDENCE IV: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

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