COMPARATIVE STUDY
JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL
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Dexmedetomidine versus fentanyl as coadjuvants of balanced anaesthesia technique in renal transplant recipients.

BACKGROUND: Ideal anesthetic technique for renal allograft recipients should provide hemodynamic stability, optimum graft reperfusion and adequate analgesia. Balanced anesthesia is preferred because renal nociception is conducted multi-segmentally and chronically ill ESRD patients have labile psychological profile. Present study compared the efficacy ofdexmedetomidine with fentanyl administered via intravenous and epidural route before induction of general anesthesia.

METHODS: Prospective, double blind randomized study, recruited sixty hemo-dynamically stable ESRD adults, 18-55 years, scheduled for elective live related renal transplantation. Patients randomly received intravenous dexmedetomidine 0.5 μg/kg followed by epidural dexmedetomidine 0.5 μg/kg alongwith 5 ml; 0.25% ropivacaine or intravenous fentanyl 1 μg/kg followed by epiduralfentanyl 1 μg/kg alongwith 5 ml; 0.25% ropivacaine. All patients received standardized general anaesthesia and continuous epidural ropivacaine 0.25%; 4-8 ml/hr. Preoperative sedation, peri-operative haemodynamics, end tidal anaesthetic agent requirement, peri-operative fluid requirement, need for vasopressors, blood loss and early graft function was assessed.

RESULTS: 80% patients receiving intravenous dexmedetomidine did not require rescue midazolam for achieving satisfactory sedation before induction of general anaesthesia. Dexmedetomidine significantly reduced propofol and end tidal inhalational agents requirement and need for rescue analgesics. Early renal graft function (onset time of diuresis after declamping, 24 hours urine output and serum creatinine levels) was comparable. There were no adverse sequelae.

CONCLUSION: Dexmedetomidine-based anaesthetic regimen versus fentanyl-based anaesthesia provided appropriate anxiolysis and analgesia for conducting invasive procedures and subsequent epidural administration of these agents reduced anaesthetic requirement and prolonged postoperative analgesia without compromising hemodynamics and respiratory parameters. Further dose finding studies can be conducted in kidney transplant recipients.

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