Oculocardiac reflex (OCR) is usually happening in pediatric strabismus surgery and observed just when the surgent pulls the ocular muscles. The reflex is one of the trigemino-vagal reflexes, and causes bradycardia, arrhythmia, and even cardiac arrest during eye surgery. Premedication for relaxation with drugs like hydroxyzine dihydrochloride or midazolam before surgery of the pediatric population is often used in Turkey, although it is not recommended in foreign countries. Some recent studies showed that when midazolam and hydroxyzine dihydrochloride used together not only, they lessen agitation before surgery but also they prevent emergence agitation. The primary aim of this prospective observational study is to show the effect of hydroxyzine dihydrochloride on preventing the pediatric patient from Oculocardiac reflex related to strabismus surgery.
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Heart Rate-1
Timeframe: 1 minute, at the "time out", through study completion an average of 6 months
Heart Rate-2
Timeframe: 1 minute, at the strabismus surgery operation, through study completion an average of 6 months
Heart Rate-3
Timeframe: within 120 seconds after the orbital muscle traction, at the strabismus surgery operation, through study completion an average of 6 months
Number of Observed Oculocardiac Reflex(OCR)
Timeframe: 2 minutes, at the strabismus surgery operation after recording Heart Rate-3, through study completion an average of 6 months