Objective- To compare the sedation, analgesia, hemodynamics effects, surgeon satisfaction and quality of surgical field provided by dexmedetomidine with combination of midazolam and fentanyl.
Methods- 100 patients of ASA I or II posted for tympanoplasty were divided into two groups of 50 patients each. Group D received Dexmedetomidine 1 μg/kg intravenously over 10 minutes loading and 0.2 μg/kg/h intravenously maintenance dose. Group MF received intravenously 0.03 mg/kg midazolam plus 1 μg/kg fentanyl over 10 minutes loading dose and normal saline 0.2 ml/kg/h intravenously as maintenance. Heart rate (HR), Mean Arterial Pressure (MAP), Respiratory Rate (RR), level of Sedation and degree of Analgesia were assessed intraoperatively. Surgeon satisfaction with the operative field and quality of sedation was inquired post-operatively with assessment of Pulse Rate (PR), Mean Arterial Pressure (MAP), Respiratory Rate (RR), sedation and duration of analgesia.
Results- Dexmedetomidine showed statistically significant decrease in heart rate and mean arterial pressure, better sedation and analgesia intraoperatively needing lesser rescue doses for sedation and analgesia and better surgeon satisfaction and longer duration of analgesia postoperatively. The adverse effects were bradycardia and hypotension with dexmedetomidine and nausea with midazolam-fentanyl.
Conclusion- Dexmedetomidine is better than a combination of midazolam-fentanyl for sedation and analgesia for tympanoplasty surgery under monitored anaesthesia care which provides optimal hemodynamic profile, better sedation, analgesia, surgeon satisfaction and minimal adverse effects.