This study was undertaken to evaluate the effect of a bolus dose of dexmedetomidine on haemodynamic, recovery responses and airway reflexes during extubation.
MATERIAL AND METHODSSixty patients aged 20-45 yrs. of either sex of ASA grade I/II scheduled for elective general surgical, ENT, orthopaedics and gynaecological surgeries were studied after randomisation into two groups; 5 minutes before anticipated end of surgery, group A and B received either dexmedetomidine 0.5 µg/kg or placebo (Saline) respectively intravenously over 2 minutes. Anaesthesia technique was standardised for both groups. Heart rate, systolic, diastolic, mean arterial pressures were recorded at the start of a bolus drug injection and thereafter 1, 2 and 3 minutes after injection during extubation; at 1, 3, 5 minutes after extubation for 15 minutes. Quality of extubation was evaluated immediately after extubation based on cough using a 5-point rating score. Postoperative sedation was evaluated on a 6-point scale (Ramsay sedation scale). Side effects like laryngospasm, bronchospasm, respiratory depression, desaturation, vomiting, hypotension, bradycardia and undue sedation were noted.
RESULTSHeart rate, systolic, diastolic, mean arterial pressure were significantly lower in study group. Extubation quality score in majority of cases was score 1 in study group and score 3 in control group. Sedation score in most of the cases was 3 in study group and 2 in control group. Bradycardia and hypotension were more in study group. Vomiting incidence was comparable in both the groups.
CONCLUSIONOur study concludes that single dose of dexmedetomidine 0.5 µg/kg administered 5 minutes before extubation attenuates the haemodynamic and airway reflexes during emergence from anaesthesia without causing undue sedation.
KEYWORDSDexmedetomidine, Haemodynamic Responses, Airway Reflexes, Extubation.
HOW TO CITE THIS ARTICLE:Vankayalapati SD, Ramsali MV, Dumpala S, et al. Effect of dexmedetomidine on haemodynamic and recovery responses during tracheal extubation: a randomized comparative study.