Discharge Readiness after Propofol with or without Dexmedetomidine for Colonoscopy: A Randomized Controlled Trial

Area of Science:

• Anesthesiology
• Pharmacology

Background:

• Enhanced recovery protocols aim to mitigate anesthesia side effects.
• Dexmedetomidine is explored as an adjunct to propofol for ambulatory anesthesia.

Purpose of the Study:

• To evaluate if low-dose dexmedetomidine added to propofol for ambulatory colonoscopy anesthesia reduces propofol requirement, improves hemodynamics, and does not prolong discharge time.

Main Methods:

• A double-blind, randomized controlled trial compared propofol-placebo versus propofol-dexmedetomidine anesthesia in 101 patients undergoing colonoscopy.
• Discharge readiness was assessed using the Modified Post Anesthetic Discharge Scoring System.

Main Results:

• 51% of patients receiving propofol-dexmedetomidine were ready for discharge within 30 minutes, versus 88% with propofol alone (P < 0.001).
• Propofol consumption was lower with dexmedetomidine (140 μg·kg⁻¹·min⁻¹ vs. 180 μg·kg⁻¹·min⁻¹; P = 0.011).
• Mean arterial pressure reduction was greater with propofol-dexmedetomidine (-30% vs. -21%; P = 0.003).

Conclusions:

• Combining low-dose dexmedetomidine with propofol for ambulatory colonoscopy anesthesia delayed discharge readiness.
• This combination also led to increased hypotension compared to propofol alone.