Background Dexmedetomidine has been used as a premedication in children primarily via nasal route. Concerns regarding bioavailability and onset of action has restricted its use via oral route. However, oral route is natural and more pleasurable compared to nasal. We compared dexeme- detomidine given as a premedication via nasal and oral routes in children undergoing minor surgical procedu- res. Methods 54 children of ASA PS I grade, aged 1to 8 years, were randomised to one of the two groups. Group I received 1mcg/kg dexmedetomidine intranasally while group II received 3 mcg/kg dexmedetomidine orally, 45 minutes prior to induction of anaesthesia. Depth of sedation was assessed using modified Observer Assessment of Alert- ness/Sedation Scale just before premedication and every 10 minutes thereafter, till parental separation. Mask ac- ceptance , baseline, minimum and maximum heart rates, at induction were recorded along with post operative complications. Results Though initial sedation scores dropped rapidly in group I compared to group II, final sedation scores were simi- lar in both the groups. There were no difference in the two groups in terms of mask acceptance and hemody- namic parameters at induction. Both the groups showed blunting of hemodynamic response (<20% increase in heart rate) at induction. Conclusion Oral dexmedetomidine (3 mcg/kg) is as effective a pre- medication as intranasal dexmedetomidine (1 mcg/kg). Dexmedetomidine premedication, in doses and via rou- tes used in this study, blunts hemodynamic response at induction of anaesthesia.
Dua et al. (Fri,) studied this question.