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- Title
Effect of ketamine and midazolam on oculocardiac reflex in pediatric strabismus surgery.
- Authors
Na Oh, Ji; Yoon Lee, Seung; Hyeon Lee, Ji; Ron Choi, So; Jhoon Chin, Young
- Abstract
Background: The oculocardiac reflex (OCR) can be elicited during manipulation of the orbital structures in the strabismus correction surgery. A sinus bradycardia is the most common manifestation of OCR; and cardiac dysrhythmia and asystole may also occur. Various efforts to reduce OCR have been attempted, but without coherent outcome results. Methods: Sixty one children, undergoing elective strabismus surgery, were randomly allocated into 2 groups: Group K received ketamine 1.0 mg/kg; and Group M received midazolam 0.15 mg/kg for induction of anesthesia. Anesthesia was maintained with 1-1.3 MAC of sevoflurane with 50% N2O in O2. Heart rate and blood pressure were measured 30 seconds before extraocular muscle (EOM) traction and immediately after traction. The OCR was defined as a decrease in heart rate more than 20% of the baseline heart rate, following manipulating EOM. Postoperative nausea and vomiting (PONV) and emergence agitation (EA) were assessed in postanesthetic care unit (PACU). Results: Blood pressure before tightening EOM in Group K was higher than that in Group M (P < 0.05). However ? HR (2.7 ± 15% vs. - 0.9 ± 16%) and incidence of OCR (10.0% vs. 19.4%) after traction an EOM were not different between the two groups. The occurrence of PONV (6.7 vs. 9.7%) and EA (30.0% vs. 22.6%) were similar. Conclusions: Ketamine does not reduce the incidence of OCR compared with midazolam in pediatric strabismus surgery. In addition, ketamine does not increase the incidence of PONV and EA. In conclusion, it is reliable to use ketamine in pediatric strabismus surgery. (Korean J Anesthesiol 2013; 64: 500-504)
- Subjects
KETAMINE; MIDAZOLAM; PHARMACODYNAMICS; ANESTHETICS; PEDIATRIC surgery; STRABISMUS treatment; GENERAL anesthesia
- Publication
Korean Journal of Anesthesiology, 2013, Vol 64, Issue 6, p500
- ISSN
2005-6419
- Publication type
Article
- DOI
10.4097/kjae.2013.64.6.500