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CompletedNCT00997126Updated Jan 27, 2017Results posted

Propofol Versus Alfentanil Versus Nitrous Oxide for Moderate Procedural Sedation

A Phase 4 interventional study of Propofol and Alfentanil in Sedation, sponsored by Hennepin Healthcare Research Institute. Completed at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2017-01-27.

Sponsored by Hennepin Healthcare Research Institute · Phase 4, Interventional, and Treatment

Phase
Phase 4
Study type
Interventional
Enrollment
126
Allocation
Randomized
Ages
18 Years and older
Sex
All
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Study summary

This is a clinical trial of propofol and alfentanil as agents for moderated procedural sedation in patients undergoing sedation in the emergency department (ED).

Read the detailed description

This was initially going to be a trial of propofol vs alfentanil vs nitrous oxide, but our use of nitrous oxide was discontinued before the trial began and the trial was conducted with only two arms

02

Conditions studied

  • Sedation

Keywords

  • propofol
  • alfentanil
  • nitrous oxide
  • moderate procedural sedation
  • Moderate Procedural Sedation in the Emergency Department
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In context

Lead sponsor

Hennepin Healthcare Research Institute is the lead sponsor of 69 studies on the registry; 4 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Adults undergoing moderate procedural sedation in the Emergency Department

Exclusion criteria

Exclusion Criteria:

  • Age \<18 years
  • Pregnancy
  • Intoxication
  • Cannot give informed consent
  • Allergy to any of the three study medications
  • ASA physical status score > 2
  • Patients who require deep procedural sedation
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Study design

Phase
Phase 4
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
126 participants (actual)

Study arms

  • Active comparator
    Propofol

    Propofol 1m g/kg IV followed by 0.5 mg/kg IV prn sedation

    Drug: Propofol

  • Active comparator
    Alfentanil

    Sedation using alfentanil 10 ug/kg followed by 5 ug/kg prn sedation

    Drug: Alfentanil

Interventions

  • DrugPropofol

    Propofol 1 mg/kg IV followed by 0.5 mg/kg prn sedation

  • DrugAlfentanil

    Alfentanil 10 ug/kg IV followed by 5 ug/kg prn sedation

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What researchers measure

Primary outcomes

  1. Number of Participants With Sub-clinical Respiratory Depression and Clinical Events Associated With Respiratory Depression During the Sedation Procedure

    Time frame: From one minute prior to start of procedure until the patient has returned to baseline mental status after the conclusion of the sedation procedure (~3-60 minutes depending on procedure duration)

Secondary outcomes

  1. Time to Return of Baseline Mental Status From Start of Procedure in Minutes

    Time frame: Single time point after completion of sedation procedure, measured from start of procedure until the patient returns to baseline mental status up to 24 hours

  2. Depth of Sedation Measured Using the OAAS Scale

    Observers Assesment of Alertness Scale, 5 responds normally to voice, 4 lethargic response to voice, 3 responds only to loud voice or light touch, 2 responds only to mild prodding or shaking, 1 responds only to painful stimuli, 0 no response to painful stimuli

    Time frame: Single measurement during sedation procedure

  3. Patient Reported Pain

    Time frame: Single measurement immediately after patient returns to baseline mental status after sedation procedure

  4. Patient Reported Recall of the Procedure

    Time frame: Single measurement immediately after patient returns to baseline mental status after sedation procedure

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Results

Posted Jan 27, 2017
Limitations and caveats
our capability of administering nitrous oxide was diminished as the trial was started, and the trial was conducted using on the propofol and alfentanil arms.

Participant flow

Participant flow — Overall Study
MilestonePropofolAlfentanil
Started6363
Completed5652
Not completed711
Withdrew: Physician decision711

Outcome measures

PrimaryNumber of Participants With Sub-clinical Respiratory Depression and Clinical Events Associated With Respiratory Depression During the Sedation Procedure
Time frame:
From one minute prior to start of procedure until the patient has returned to baseline mental status after the conclusion of the sedation procedure (~3-60 minutes depending on procedure duration)
Reported as:
Number · participants
Number of Participants With Sub-clinical Respiratory Depression and Clinical Events Associated With Respiratory Depression During the Sedation Procedure
participantsPropofolAlfentanil
Number of Participants With Sub-clinical Respiratory Depression and Clinical Events Associated With Respiratory Depression During the Sedation Procedure1112
SecondaryTime to Return of Baseline Mental Status From Start of Procedure in Minutes
Time frame:
Single time point after completion of sedation procedure, measured from start of procedure until the patient returns to baseline mental status up to 24 hours
Reported as:
Median · minutes
Time to Return of Baseline Mental Status From Start of Procedure in Minutes
minutesPropofolAlfentanil
Time to Return of Baseline Mental Status From Start of Procedure in Minutes13 (9 to 17)13 (10 to 17)
SecondaryDepth of Sedation Measured Using the OAAS Scale

Observers Assesment of Alertness Scale, 5 responds normally to voice, 4 lethargic response to voice, 3 responds only to loud voice or light touch, 2 responds only to mild prodding or shaking, 1 responds only to painful stimuli, 0 no response to painful stimuli

Time frame:
Single measurement during sedation procedure
Reported as:
Median · units on a scale
Depth of Sedation Measured Using the OAAS Scale
units on a scalePropofolAlfentanil
Depth of Sedation Measured Using the OAAS Scale2 (1 to 3)3 (2 to 4)
SecondaryPatient Reported Pain
Time frame:
Single measurement immediately after patient returns to baseline mental status after sedation procedure
Reported as:
Number · participants
Patient Reported Pain
participantsPropofolAlfentanil
Patient Reported Pain725
SecondaryPatient Reported Recall of the Procedure
Time frame:
Single measurement immediately after patient returns to baseline mental status after sedation procedure
Reported as:
Number · participants
Patient Reported Recall of the Procedure
participantsPropofolAlfentanil
Patient Reported Recall of the Procedure1339
Statistical analysis
  • Propofol vs Alfentanil · Chi-squared · p = 0.657

Adverse events

Collected over From 1 minute prior to the procedure until the patient returned to baseline mental status. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Propofol—0/56 (0%)25/56 (44.6%)
Alfentanil—0/52 (0%)29/52 (55.8%)
Most frequent other events
Most frequent other events
EventPropofolAlfentanil
any airway or respiratory adverse eventRespiratory, thoracic and mediastinal disorders25/5629/52

Baseline characteristics

Age, Continuous
Age, Continuous(years)PropofolAlfentanilTotal
Median36 (18 to 64)32 (18 to 82)34 (18 to 82)
Gender
Gender(Participants)PropofolAlfentanilTotal
Female312354
Male252954
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Study locations

1 site
  • Hennepin County Medical Center
    Minneapolis, Minnesota 55415, United States
09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jan 27, 2017, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT00997126
Lead sponsor
Hennepin Healthcare Research Institute
Responsible party
Sponsor
First posted
Oct 19, 2009
Start date
Oct 2009
Primary completion
Apr 2015
Completion
Apr 2015
Results posted
Jan 27, 2017
Last update
Jan 27, 2017

Study contacts

James R Miner, MD
principal investigator · Hennepin Healthcare Research Institute

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

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