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Tethered Capsule Endoscope in Screening Participants for Barrett Esophagus

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified February 2010 by National Cancer Institute (NCI).
Recruitment status was:  Recruiting
National Cancer Institute (NCI)
Information provided by:
National Cancer Institute (NCI) Identifier:
First received: May 15, 2009
Last updated: January 9, 2014
Last verified: February 2010

RATIONALE: A tethered capsule endoscope may be as effective as standard sedated endoscopy of the esophagus, stomach, and duodenum in screening for Barrett esophagus.

PURPOSE: This phase I/II trial is studying how well a tethered capsule endoscope works in screening participants for Barrett esophagus.

Condition Intervention Phase
Esophageal Cancer
Precancerous Condition
Other: questionnaire administration
Procedure: comparison of screening methods
Procedure: diagnostic endoscopic procedure
Procedure: esophagogastroduodenoscopy
Procedure: tethered capsule endoscopy
Phase 1
Phase 2

Study Type: Interventional
Study Design: Masking: Open Label
Primary Purpose: Screening
Official Title: Screening for Barrett's Esophagus With an Ultrathin Scanning Fiber Endoscope

Resource links provided by NLM:

Further study details as provided by National Cancer Institute (NCI):

Primary Outcome Measures:
  • Time required for swallowing the tethered capsule endoscope (TCE) to the stomach (Phase I)
  • Time required to image the squamo-columnar junction (Phase I)
  • Number of repeated swallows to achieve esophageal imaging (Phase I)
  • Amount of simethicone needed to reduce bubbles (Phase I)
  • Need for effervescent granules or other approaches to distend the esophagus (Phase I)
  • Time required for the entire TCE procedure (Phase I)
  • Quality of images (clarity, color, field of view, and resolution) obtained in the entire TCE procedure (Phase I)
  • Overall comfort during ingestion, pullback, and withdrawal of the TCE (Phase I)
  • Sensitivity, specificity, and accuracy of the TCE for identifying suspected Barrett esophagus (Phase II)
  • Agreement between the findings on the live TCE exam with the recorded TCE exam (Phase II)
  • Time to perform the TCE exam (Phase II)
  • Test characteristics of the first half vs the last half of the TCE exams performed by each of the 2 endoscopists (Phase II)
  • Comparison of participants' satisfaction with the TCE vs esophagogastroduodenoscopy (Phase II)

Secondary Outcome Measures:
  • Ability of the TCE to identify the presence or absence of other esophageal lesions (e.g., inflammation, diverticula, or varices) (Phase II)
  • Results of the histologic analysis of any biopsy specimens (Phase II)

Estimated Enrollment: 50
Study Start Date: May 2009
Estimated Primary Completion Date: December 2011 (Final data collection date for primary outcome measure)
Detailed Description:


  • To determine the clinical feasibility of obtaining endoscopic esophageal images using a tethered capsule endoscope (TCE). (Phase I)
  • To determine the optimal weight and possibly shape for rapid patient ingestion and extraction of the TCE. (Phase I)
  • To determine the optimal tether design (e.g., rigidity, distance markings, and other material properties). (Phase I)
  • To determine the optimal protocol for patient ingestion and extraction of the TCE. (Phase I)
  • To compare the TCE to standard sedated esophagogastroduodenoscopy for identifying suspected Barrett esophagus. (Phase II)


  • Phase I: Participants swallow the tethered capsule endoscope (TCE) so that the distal end of the TCE enters the stomach. The TCE is then slowly withdrawn by the physician in order to visualize the gastroesophageal junction and the esophagus in a retrograde fashion until the upper esophageal sphincter is reached. The image acquisition process is repeated and the participant may be asked to swallow the TCE in up to 7 different positions with 2 swallows per position (no more than 20 swallows total).
  • Phase II: Participants undergo TCE as in phase I, followed by standard sedated esophagogastroduodenoscopy (EGD) by a second physician.

Images obtained via TCE and EGD are reviewed by a third physician blinded to the results of each exam.

In both phases, participants and physicians complete a questionnaire after the TCE procedure to determine the ease of the procedure. Participants are also asked for specific suggestions to improve the TCE experience. Participants enrolled in phase II also complete a questionnaire 1 week after EGD to compare the TCE procedure with the EGD.


Ages Eligible for Study:   18 Years to 80 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes


  • Meets one of the following criteria:

    • Healthy participant (phase I)
    • Scheduled to undergo esophagogastroduodenoscopy at the VA Puget Sound Health Care System for the evaluation of reflux symptoms (including screening for Barrett esophagus [BE]) or for follow-up of known BE (phase II)
  • No current diagnosis of cancer


  • Not pregnant
  • Able to fast for ≥ 6 hours prior to scheduled appointment
  • No symptoms of dysphagia
  • No history of a swallowing disorder (e.g., scleroderma, achalasia, esophageal stricture, or esophageal diverticulum)
  • No history of a known or suspected gastrointestinal (GI) obstruction
  • No other major medical illnesses (e.g., unstable cardiovascular disease, end-stage liver or kidney disease, or suspected active GI bleeding)
  • No major physical disability that would prevent the participant from transferring from a chair to a bed and sitting up
  • Not planning to undergo an MRI within 2 weeks after the study procedure


  • No prior surgery on the oropharynx, neck, esophagus, or stomach
  • No concurrent anticoagulant medications or clopidogrel
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00903136

United States, Washington
Veterans Affairs Medical Center - Seattle Recruiting
Seattle, Washington, United States, 98108
Contact: Jason A. Dominitz, MD    206-764-2285      
Sponsors and Collaborators
VA Office of Research and Development
National Cancer Institute (NCI)
Principal Investigator: Jason A. Dominitz, MD VA Office of Research and Development
  More Information

Responsible Party: Jason A. Dominitz, Veterans Affairs Medical Center - Seattle Identifier: NCT00903136     History of Changes
Other Study ID Numbers: CDR0000641937
Study First Received: May 15, 2009
Last Updated: January 9, 2014

Keywords provided by National Cancer Institute (NCI):
Barrett esophagus
esophageal cancer
adenocarcinoma of the esophagus

Additional relevant MeSH terms:
Esophageal Neoplasms
Barrett Esophagus
Precancerous Conditions
Gastrointestinal Neoplasms
Digestive System Neoplasms
Neoplasms by Site
Head and Neck Neoplasms
Digestive System Diseases
Esophageal Diseases
Gastrointestinal Diseases
Digestive System Abnormalities processed this record on April 28, 2017