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CompletedNCT03270046Updated Sep 7, 2017

The Effects of An Addition of Water Enema to PEG for Colon Preparation

An interventional study of Water enema in Adenoma, Bile Duct, sponsored by Mahidol University. Completed. Open to participants aged 18 Years to 80 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2017-09-07.

Sponsored by Mahidol University · Not applicable, Interventional, and Diagnostic

Phase
Not applicable
Study type
Interventional
Enrollment
100
Allocation
Randomized
Ages
18 Years to 80 Years
Sex
All
01

Study summary

The purpose of this study is to compare the preparation quality by using Ottawa Bowel Preparation Scale between the standard PEG preparation and the addition of water enema in participants scheduled for CRC screening

Read the detailed description

Background : Good bowel preparation improves the rate of polyp detection and the time of caecal intubation during colorectal cancer (CRC) screening.

Suboptimal bowel preparation can results in adenoma miss rate up to 42% (95% CI, 35-49) and advanced adenoma miss rate up to 27% (95% CI, 17-41) The European Society of Gastrointestinal Endoscopy (ESGE) Guideline recommends a split regimen of 4L of polyethylene glycol (PEG) solution (or a same-day regimen in the case of afternoon colonoscopy) for a routine bowel preparation and the delay between the last dose of bowel preparation and colonoscopy should be minimized and no longer than 4 hours.

The investigators hypothesize that the addition of water enema to the standard PEG bowel preparation could provide the better quality of bowel preparation and then result in improvement in the rate of adenoma detection among participants scheduled for CRC screening with preparation to procedure interval > 8 hr.

The purpose of this study is to compare the preparation quality using Ottawa Bowel Preparation Scale between the standard PEG preparation and the addition of water enema in participants scheduled for CRC screening. The secondary aim is to compare the effect of the standard PEG bowel preparation and the addition of water enema in terms of adenoma detection rate, the completeness of the examination, total and withdrawal time, safety and adverse events among those scheduled for CRC screening.

02

Conditions studied

  • Adenoma, Bile Duct

Keywords

  • Bowel preparation
  • CRC screening
03

In context

Lead sponsor

Mahidol University is the lead sponsor of 747 studies on the registry; 119 are open to participants now.

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

04

Who can participate

Ages eligible
18 Years to 80 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Patients scheduled for CRC screening
  • Bowel preparation using 3 liters of PEG solution
  • Colonoscopy performed at 8-16 hours after bowel preparation

Exclusion criteria

Exclusion Criteria:

  • History of a failed bowel preparation
  • Previous colonic surgery
  • Uncontrolled underlying disease
  • Pregnancy
05

Study design

Phase
Not applicable
Primary purpose
Diagnostic
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Investigator)
Enrollment
100 participants (actual)

Study arms

  • Placebo comparator
    No enema group

    Consecutive participants will be randomly assigned to take a preparation regimen of 3 liter of PEG 8-16 hr. before colonoscopy without water enema. Before the procedure, investigators record baseline parameters. Colonoscopies underwent by experienced endoscopists and by GI fellows. During the colonoscopy, the investigators recorded video, cecal intubation and withdraw time, amount and position of polyps, rate of complete examination and complication. The video was sent to other 2 endoscopists who did not known which participant was enema to evaluate the quality of bowel cleansing by using Ottawa bowel preparation scale and Likert scale for evaluation of side effect, complication during PEG ingestion, enema and colonoscopy, and participant satisfactory.

    Procedure: Water enema

  • Active comparator
    Water enema group

    Consecutive participants will be randomly assigned to take a preparation regimen of 3 liter of PEG 8-16 hr. before colonoscopy and enema with sterile water until stool was clear or patient felt discomfort but not exceed 3 liter, before colonoscopy. Before the procedure, investigators record baseline parameters. Colonoscopies underwent by experienced endoscopists and by GI fellows. During the colonoscopy, the investigators recorded video, cecal intubation and withdraw time, amount and position of polyps, rate of complete examination and complication.The video was sent to other 2 endoscopists who did not known which participant was enema to evaluate the quality of bowel cleansing by using Ottawa bowel preparation scale and Likert scale.

    Procedure: Water enema

Interventions

  • ProcedureWater enema

    Addition of water enema in standard PEG preparation in participants scheduled for CRC screening.

06

What researchers measure

Primary outcomes

  1. Bowel preparation quality using Ottawa Bowel Preparation Scale

    Evaluate Ottawa Bowel Preparation Scale by 2 endoscopists using video record

    Time frame: 1 days

Secondary outcomes

  1. The effect of addition of water enema in standard PEG bowel preparation in terms of adenoma detection rate

    Evaluate the adenoma detection rate compare between two groups

    Time frame: 1 days

  2. The effect of addition of water enema in the standard PEG bowel preparation in terms of the completeness of the examination

    Evaluate the completeness of examination compare between two groups

    Time frame: 1 day

  3. The effect of addition of water enema in the standard PEG bowel preparation in terms of total and withdrawal times

    Evaluate total and withdrawal times of colonoscopy procedures compare between two groups

    Time frame: 1 day

  4. The effect of addition of water enema in the standard PEG bowel preparation in terms of safety and adverse events

    Evaluate the safety and efficacy of procedures compare between two groups

    Time frame: 3 days

07

Study locations

No study locations are listed for this record.

08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
Not marked actual or estimatedDates not marked actual or estimated

The record gives a start of Aug 2013, a primary completion of Mar 2015 and a completion of Mar 2015. It does not say whether these dates are actual or estimated.

How these figures are worked out, and which studies are left out of them.

Registered
May 3, 2017
First posted
Sep 1, 2017
Start
Aug 2013
Primary completionActual
Mar 2015
CompletionActual
Mar 2015
Last update
Sep 7, 2017
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Sep 7, 2017, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03270046
Lead sponsor
Mahidol University
Responsible party
Somchai Leelakusolvong (Associate professor, Mahidol University) — Principal investigator
First posted
Sep 1, 2017
Start date
Aug 2013
Primary completion
Mar 2015
Completion
Mar 2015
Last update
Sep 7, 2017

Study contacts

Somchai Leelakusolvong, M.D.
principal investigator · Mahidol University

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Aug 2017. You cannot join it, but the record below documents what was studied.

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