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Related Experiment Videos

Patient-controlled sedation using propofol: randomized, double-blind dose refinement.

A F Smith1, S J Thorpe, L B Cook

  • 1Department of Anaesthesia, Royal Oldham Hospital, Lancashire, UK.

European Journal of Anaesthesiology
|March 20, 1999
PubMed
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A maximum propofol infusion rate of 25 mg min-1 provides rapid sedation for patients undergoing elective surgery. A lower rate of 16 mg min-1 proved too slow for effective patient-controlled sedation.

Area of Science:

  • Anesthesiology
  • Pharmacology

Background:

  • Patient-controlled sedation (PCS) with propofol is used for elective surgery.
  • Optimizing propofol infusion rates is crucial for balancing sedation efficacy and safety.

Purpose of the Study:

  • To compare the onset of sedation between two maximum propofol infusion rates (16 mg min-1 vs. 25 mg min-1) in patient-controlled sedation.
  • To evaluate the clinical utility of different propofol infusion rates for achieving rapid sedation and amnesia.

Main Methods:

  • A double-blind, randomized trial involving 40 healthy young patients undergoing elective surgery.
  • Patients self-administered propofol via a patient-controlled sedation system with maximum rates of 16 mg min-1 or 25 mg min-1.
  • Recorded onset times for sedative effect, slurred speech, and amnesia.

Related Experiment Videos

Main Results:

  • All patients achieved satisfactory sedation without oversedation.
  • The 16 mg min-1 group experienced significantly longer onset times for sedation, slurred speech, and amnesia (P < 0.01).
  • The 25 mg min-1 group demonstrated rapid sedation in all patients.

Conclusions:

  • A maximum propofol infusion rate of 16 mg min-1 is not clinically useful due to slow onset of sedation and amnesia.
  • A maximum infusion rate of 25 mg min-1 of propofol allows for rapid and safe sedation in patient-controlled sedation regimens.
  • The 25 mg min-1 rate offers a favorable balance between efficacy and safety for elective surgery sedation.