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Experimental Device to Improve Colonoscopy

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ClinicalTrials.gov Identifier: NCT00719641
Recruitment Status : Completed
First Posted : July 22, 2008
Last Update Posted : March 24, 2020
Sponsor:
Information provided by (Responsible Party):
National Institutes of Health Clinical Center (CC) ( National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) )

Tracking Information
First Submitted Date July 19, 2008
First Posted Date July 22, 2008
Last Update Posted Date March 24, 2020
Actual Study Start Date August 5, 2008
Actual Primary Completion Date September 21, 2016   (Final data collection date for primary outcome measure)
Current Primary Outcome Measures
 (submitted: March 20, 2020)
  • Cecal Intubation Time [ Time Frame: During colonoscopy, up to 60 minutes ]
    Cecal intubation time of colonoscopy with SSW, compared to without SSW
  • Number of Participants Without Re-looping Among Those With Looping [ Time Frame: During the colonoscopy, up to 60 minutes ]
    Re-looping during the procedure that used SSW, this information only collected when using SSW
Original Primary Outcome Measures
 (submitted: July 19, 2008)
The use of SSW will prevent re-looping of the colonscope.
Change History
Current Secondary Outcome Measures Not Provided
Original Secondary Outcome Measures
 (submitted: July 19, 2008)
Reduction of colonscope looping will improve operator and procedural efficiency and patient tolerability of colonscopy.
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
 
Descriptive Information
Brief Title Experimental Device to Improve Colonoscopy
Official Title A Trial of Segmental Stiffening Wires to Improve the Efficiency and Patient Tolerability of Colonoscopy
Brief Summary

This study will test the use of a new device called a segmental stiffening wire (SSW) in colonoscopy to correct a problem called looping. Colonoscopy is the best test for detecting early colon cancer and removing growths called polyps, which can become colon cancer. Sometimes the flexible tube (colonoscope) used in the procedure loops at a certain point as it advances through the colon, making it difficult to move further and causing the patient pain from excessive stretching of the colon. The SSW is designed to prevent this by stiffening the part of the tube that would otherwise form the loop.

Healthy subjects between 50 and 80 years of age and healthy subjects 40 years and older who have a family history of colon cancer may be eligible for this study.

Participants undergo colonoscopy a day after self-administering a bowel cleansing preparation. The first part of the procedure is done similarly to that of a flexible sigmoidoscopy, and no sedation or pain medication is used. The colonoscope is inserted into the rectum and advanced about one-third the length of the colon. Pain or discomfort should be mild to moderate cramping and a feeling of having to move the bowels. The subject is asked to score his or her pain level at this point using a standard pain scale. If there is pain, the procedure is stopped and an x-ray is taken to determine if the colonoscope has looped. If it has, the loop is undone and the SSW is used. Another x-ray is then taken to document that the loop has been prevented with the SSW, and the procedure is completed as per standard medical practice. Subjects are taken to the recovery area, informed of the test results and then discharged home in the care of an accompanying adult.

Detailed Description Colonoscopy can be challenging to perform and painful due to looping of the colonoscope. Looping occurs when further insertion of the colonoscope results in a loop forming in the shaft of the colonoscope instead of advancement of the tip. Attempts have been made to solve this problem, but to date there is no perfect solution. Since colonoscopy is the gold standard for colon cancer screening providing a device that could prevent looping would be valuable. We have developed an experimental device that has not been approved outside of the context of this study known as the Segmental Stiffening Wire (SSW). This wire will be utilized by passing it through the biopsy channel of the endoscope. The wire has a 15-25 inch area of increased thickness and stiffness. The stiffened section can be advanced into areas of looping in an effort to prevent re-looping. We will conduct a pilot study in two phases. The first phase will include approximately 10 healthy volunteers who will undergo colonoscopy using the SSW. Fluoroscopy will be used to determine if the device prevents re-looping. If in phase 1 the device is successful in over 30% of episodes, the second phase will be undertaken. In the second phase volunteers willing to undergo two colonoscopies on consecutive days will be recruited. Volunteers who experience looping will be randomized as to whether the SSW is available. These volunteers will then undergo an otherwise identical colonoscopy on the following day except the SSW will be available if it was not on the first colonoscopy or it will not be available if it was on the first colonoscopy. Volunteers who undergo two colonoscopies will not need a second bowel preparation but will be maintained on a clear liquid diet between the two procedures. Volunteers in which looping does not occur will have their initial colonoscopy completed as normal and then will leave the study. If unable to obtain sufficient volunteers willing to undergo dual colonoscopy, then volunteers willing to undergo single colonoscopy will be included and their procedures will be done with or without the SSW in random fashion. The endpoints will be cecal intubation time; cecal intubation rate; quantity of sedation/analgesia; number of ancillary maneuvers; pain/sedation as measured by the Visual Analog Pain Scale, the Ramsey Sedation Scale, and clinical observations; vital sign changes; and the endoscopists subjective assessment of procedure difficulty and the usefulness of the SSW.
Study Type Observational
Study Design Observational Model: Other
Time Perspective: Other
Target Follow-Up Duration Not Provided
Biospecimen Not Provided
Sampling Method Non-Probability Sample
Study Population Healthy subjects between 50 and 80 years of age and healthy subjects 40 years and older who have a family history of colon cancer may be eligible for this study.
Condition
  • Colonoscopy
  • Looping
  • Prevent Looping
  • Colon Cancer Screening
Intervention Not Provided
Study Groups/Cohorts
  • Phase 1: Single Colonoscopy
    Feasibility testing using the segmental stiffening wire
  • Phase 2; Not randomized
    Phase 2 participants who did not have looping during first colonoscopy
  • Phase 2: Randomized to SSW during first colonoscopy
    Phase 2 participants in whom looping occurred on first biopsy, randomized to subsequent use of segmental stiffening wire, then colonoscopy with no segmental stiffening wire upon repeat colonoscopy the next day.
  • Phase 2: Randomized to SSW during second colonoscopy
    Phase 2 participants in whom looping occurred on first biopsy, randomized to no subsequent use of the segmental stiffening wire that day, then colonoscopy with segmental stiffening wire upon repeat colonoscopy the next day.
Publications *

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Recruitment Information
Recruitment Status Completed
Actual Enrollment
 (submitted: March 20, 2020)
42
Original Enrollment
 (submitted: July 19, 2008)
90
Actual Study Completion Date September 21, 2016
Actual Primary Completion Date September 21, 2016   (Final data collection date for primary outcome measure)
Eligibility Criteria
  • INCLUSION CRITERIA:

Colonoscopy is indicated based on well-established national guidelines. This includes volunteers age 50 or greater who are at average risk for colon cancer, and volunteers age 40 or greater who are at increased risk based on a personal history of colon polyps or a family history of colon polyps or cancer.

Volunteer meets the criteria of Anesthesia Level 1 or 2.

Volunteer agrees to undergo the study procedures.

EXCLUSION CRITERIA:

Ongoing psychiatric history including volunteers who have been hospitalized for psychiatric reasons, have missed significant number of days of work for psychiatric reasons, or who admit to suicidal ideations.

Former or current history of alcohol or drug dependency.

History of colonic resection.

Pregnancy.

Age greater than 80 or less than 40.

Prior radiation to the abdomen or pelvis.

American Society of Anesthesiologists Grade 3, 4, or 5.

Allergy or other contraindications to midazolam or fentanyl.

Sex/Gender
Sexes Eligible for Study: All
Ages 40 Years to 80 Years   (Adult, Older Adult)
Accepts Healthy Volunteers Yes
Contacts Contact information is only displayed when the study is recruiting subjects
Listed Location Countries United States
Removed Location Countries  
 
Administrative Information
NCT Number NCT00719641
Other Study ID Numbers 080173
08-DK-0173
Has Data Monitoring Committee Not Provided
U.S. FDA-regulated Product Not Provided
IPD Sharing Statement Not Provided
Responsible Party National Institutes of Health Clinical Center (CC) ( National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) )
Study Sponsor National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Collaborators Not Provided
Investigators
Principal Investigator: Stephen A Wank, M.D. National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
PRS Account National Institutes of Health Clinical Center (CC)
Verification Date October 2019