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CompletedNCT02352233REVCORUpdated Feb 2, 2015

Retroview Colonoscope for the Evaluation of Colon Mucosa Study

An observational study in Colonic Diseases, sponsored by Instituto Ecuatoriano de Enfermedades Digestivas. Completed at 1 site in Ecuador. Open to participants aged 18 Years to 85 Years. Per ClinicalTrials.gov, last updated 2015-02-02.

Sponsored by Instituto Ecuatoriano de Enfermedades Digestivas · Observational

Study type
Observational
Model
Case-only
Time perspective
Prospective
Enrollment
48
Ages
18 Years to 85 Years
Sex
All
01

Study summary

Colonoscopy is the "gold standard" technique for diagnosis and treatment of colonic lesions. Moreover, high definition colonoscopes (HD) associated to digital chromoendoscopy had shown better results regarding adenoma and polyps detection when compared to standard non HD scopes. However, evidence shows that during standard colonoscopy many lesions could be missed, including polyps, cancer and other kind of lesions. This could be correlated to many factors and recently reports show evidence that lesions behind the folds could be missed because the limitation of a forward view examination. Until know, a new auxiliary imaging device called "Third Eye Retroscope" had demonstrated more lesions detection during colonoscopy using a retro view, but with some limitations as absence of HD vision, the need of additional equipment and the fact the device occupies the accessory channel, limiting therapeutic efficiency. Recently a new HD colonoscope called "RETROVIEW" (PENTAX Medical) has been developed. It permits visualization of colonic mucosa in forward view, in retroflex view and allows for performance of diagnostic and therapeutics in a single colonoscope.

Read the detailed description

Primary outcome:

To determine the safety and feasibility of the retro view during colonoscopy using RETROVIEW colonoscope. Safety was measured by the number of bleeding or perforation rates as adverse event during the procedure. Feasibility was measured by the number of cases that is possible to achieve a retroflexion in the colon Secondary outcome: withdrawal phase time and total procedure time.

02

Conditions studied

  • Colonic Diseases

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Keywords

  • retroview colonoscope
  • retroflexion colonoscopy
  • colonoscopy
03

In context

Colonic Diseases

147 studies on the registry are indexed under Colonic Diseases; 23 are open to participants now.

This study's enrollment of 48 is below the median of 165 across 51 observational studies indexed under Colonic Diseases.

Browse Colonic Diseases studies →

Lead sponsor

Instituto Ecuatoriano de Enfermedades Digestivas is the lead sponsor of 39 studies on the registry; 10 are open to participants now.

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

04

Who can participate

Ages eligible
18 Years to 85 Years
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

consecutive patients undergoing for colonoscopy at the Instituto Ecuatoriano de Enfermedades Digestivas

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

  • undergoing colonoscopy for colorectal neoplasia screening, for polyp surveillance, or for diagnostic workup including anemia, abdominal pain, constipation, abnormal imaging; and if they were able to understand and provide written consent for the procedure.

Exclusion criteria

Exclusion Criteria:

  • age \<18; pregnancy, included history of colon resection, known inflammatory bowel disease, polyposis syndrome, radiation therapy to abdomen or pelvis, suspicion of chronic stricture potentially precluding complete colonoscopy, presence of diverticulitis or toxic megacolon, hemophilia and concurrent enrollment in another clinical investigation.
05

Study design

Observational model
Case-only
Time perspective
Prospective
Enrollment
48 participants (actual)
Patient registry
No
Biospecimen retention
Samples without dna

Groups and cohorts

  • colonoscopy group

    consecutive patients undergoing for colonoscopy for any formal indication. Patients were submitted to colonoscopy using RETROVIEW colonoscope

    Procedure: RETROVIEW colonoscope

Interventions

  • ProcedureRETROVIEW colonoscope

    withdrawal in retro vision and forward vision was performed by segments (right, transverse, left, sigmoid colon and rectum). Retroflexed therapeutics procedures were executed when needed.

    Also known as: Retro view colonoscopy, Retroflexion during colonoscopy

06

What researchers measure

Primary outcomes

  1. Safety

    The safety was measured by the number of cases with bleeding or perforation

    Time frame: 3 months

  2. Feasibility

    The feasibility was measured determining the number of cases that was possible to perform a retro view by segments in the colon.

    Time frame: 3 months

Secondary outcomes

  1. Withdrawal colonoscopy phase

    withdrawal colonoscopy phase time measured in minutes (excluding time taking in minutes in case of therapeutics)

    Time frame: 3 months

  2. Total procedure time

    Total procedure time including retro view and forward view in minutes (excluding time taking in minutes in case of therapeutics)

    Time frame: 3 months

Other outcomes

  1. Number of lesions

    number of lesions detected during the entire colonoscopy

    Time frame: 3 months

  2. Endoscopic Treatment

    number of endoscopic therapeutic procedures in retro vision during colonoscopy

    Time frame: 3 months

07

Study locations

1 site
  • Instituto Ecuatoriano de Enfermedades Digestivas
    Guayaquil, Guayas 1301266, Ecuador
08

References and documents

Publications

  • Waye JD, Heigh RI, Fleischer DE, Leighton JA, Gurudu S, Aldrich LB, Li J, Ramrakhiani S, Edmundowicz SA, Early DS, Jonnalagadda S, Bresalier RS, Kessler WR, Rex DK. A retrograde-viewing device improves detection of adenomas in the colon: a prospective efficacy evaluation (with videos). Gastrointest Endosc. 2010 Mar;71(3):551-6. doi: 10.1016/j.gie.2009.09.043. Epub 2009 Dec 16. PubMed 20018280 ↗
09

Timeline

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

The record gives a start of Jan 2014, a primary completion of Mar 2014 and a completion of Apr 2014. 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
Aug 5, 2014
First posted
Feb 2, 2015
Start
Jan 2014
Primary completionActual
Mar 2014
CompletionActual
Apr 2014
Last update
Feb 2, 2015
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 Feb 2, 2015, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT02352233
Lead sponsor
Instituto Ecuatoriano de Enfermedades Digestivas
Responsible party
Sponsor
First posted
Feb 2, 2015
Start date
Jan 2014
Primary completion
Mar 2014
Completion
Apr 2014
Last update
Feb 2, 2015

Study contacts

Carlos Robles-Medranda, MD
principal investigator · Instituto Ecuatoriano de Enfermedades Digestivas

Oversight

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

Not currently enrolling

This study is completed, as verified in Sep 2014. You cannot join it, but the record below documents what was studied.

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