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CompletedNCT00446420Updated May 30, 2013

Cognitive Impairment Following Sedation for Colonoscopy With Propofol, Midazolam and Fentanyl Combinations

A Phase 4 interventional study of Propofol, midazolam, fentanyl in Cognitive Impairment, sponsored by Melbourne Health. Completed at 1 site in Australia. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2013-05-30.

Sponsored by Melbourne Health · Phase 4, Interventional, and Prevention

Phase
Phase 4
Study type
Interventional
Enrollment
200
Allocation
Randomized
Ages
18 Years and older
Sex
All
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Study summary

Our hypothesis is that adding midazolam and/or fentanyl to propofol sedation for elective outpatient colonoscopy increases cognitive impairment at hospital discharge without improving intraoperative conditions or reducing intraoperative side-effects.

200 healthy patients aged 18 years or older will be randomised to receive propofol or propofol plus midazolam and/or fentanyl. Cognitive impairment will be tested at hospital discharge using Cogstate computerised testing software.

Read the detailed description

A great variety of drug combinations are administered to patients having elective outpatient colonoscopy. In addition, as patients are going home, some may have residual cognitive deficits that making leaving the hospital unsafe. This study aims to find drugs combinations that are associated with the least cognitive impairment.

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Conditions studied

  • Cognitive Impairment
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In context

Cognitive Dysfunction

3,843 studies on the registry are indexed under Cognitive Dysfunction; 1,100 are open to participants now.

This study's enrollment of 200 is above the median of 65 across 2,808 interventional studies indexed under Cognitive Dysfunction.

Browse Cognitive Dysfunction studies →

Lead sponsor

Melbourne Health is the lead sponsor of 59 studies on the registry; 5 are open to participants now.

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

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Who can participate

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

Inclusion criteria

  • Aged 18 years or older presenting for elective outpatient colonoscopy following full bowel preparation

Exclusion criteria

Exclusion Criteria:

  • No cognitive impairment
  • Adequate English language comprehension
  • Not combined with other procedures
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Study design

Phase
Phase 4
Primary purpose
Prevention
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Outcomes assessor)
Enrollment
200 participants (actual)

Study arms

  • Active comparator
    1

    These patients will only receive intravenous propofol which will be titrated to an OAA/S score of 3. They will not receive fentanyl, midazolam or any other drugs

    Drug: Propofol, midazolam, fentanyl

  • Active comparator
    2

    These patients will receive propofol plus midazolam and/or fentanyl. Midazolam and fentanyl will be given in fixed doses first and propofol will be titrated to effect. All drugs will be given intravenously.

    Drug: Propofol, midazolam, fentanyl

Interventions

  • DrugPropofol, midazolam, fentanyl

    All drugs administered in doses according to anaesthetists' discretion during sedation for colonoscopy

    Also known as: Diprivan, Sublimase, Versed

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What researchers measure

Primary outcomes

  1. Cognitive impairment at hospital discharge after elective outpatient colonoscopy

    Time frame: Before discharge from daycare facility

Secondary outcomes

  1. Dreaming during sedation, intraoperative operating conditions and complications, satisfaction with care

    Time frame: Before discharge from daycare facility

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Study locations

1 site
  • Royal Melbourne Hospital
    Parkville, Victoria 3050, Australia
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References and documents

Publications

  • Padmanabhan U, Leslie K, Eer AS, Maruff P, Silbert BS. Early cognitive impairment after sedation for colonoscopy: the effect of adding midazolam and/or fentanyl to propofol. Anesth Analg. 2009 Nov;109(5):1448-55. doi: 10.1213/ane.0b013e3181a6ad31. Epub 2009 Jul 17. PubMed 19617584 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on May 30, 2013, 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
NCT00446420
Lead sponsor
Melbourne Health
Responsible party
Sponsor
First posted
Mar 12, 2007
Start date
Feb 2007
Primary completion
Feb 2008
Completion
Feb 2008
Last update
May 30, 2013

Study contacts

Kate Leslie, MD
principal investigator · Melbourne Health

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in May 2013. You cannot join it, but the record below documents what was studied.

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