Panchromoendoscopy Using Oral Indigo Carmine Mixed With Polyethylene Glycol Prep
|Colonic Polyps||Drug: Chromoendoscopy (Indigo Carmine) Other: Control||Phase 1|
|Study Design:||Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Participant, Outcomes Assessor)
Primary Purpose: Diagnostic
|Official Title:||Panchromoendoscopy Using Oral Indigo Carmine Mixed With Polyethylene Glycol Prep|
- Dose of indigo carmine needed to provide adequate chromoendoscopy of the right sided colon [ Time Frame: 24 hours ]The dose in Indigo Carmine in mg per 1/8 - 1/2 gallon needed to provide adequate staining of the cecum and ascending colon.
- Cecal intubation rate [ Time Frame: 24 hours ]
- Time to cecal intubation [ Time Frame: 24 hours ]
- Withdrawal time [ Time Frame: 24 hours ]
- Quality of bowel preparation [ Time Frame: 24 hours ]
The Boston Bowel Preparation Scale will be used to grade the quality of the colonic prep:
0 = Unprepared colon segment with mucosa not seen due to solid stool that cannot be cleared.
- = Portion of mucosa of the colon segment seen, but other areas of the colon segment not well seen due to staining, residual stool and/or opaque liquid.
- = Minor amount of residual staining, small fragments of stool and/or opaque liquid, but mucosa of colon segment seen well.
- = Entire mucosa of colon segment seen well with no residual staining, small fragments of stool or opaque liquid.
- Patient tolerance of indigo carmine solution [ Time Frame: 30 days ]
The rate side effects experienced in the active arm versus the control arm will be compared to determine if side effects experienced are different in both groups. Known common side effect from the Polyethylene based colonic preparation include:
Malaise Abdominal distension Anal irritation Nausea Abdominal pain Vomiting Rigors Thirst
- Quality of staining of the entire colon [ Time Frame: 24 hours ]
Scoring for 3 areas of the colon will be recorded separately:
Right sided, transverse, left sided Distribution of staining in each area: 0 none, covering less than 50% = 1, patchy covering more than 50%=2, staining most of the mucosa (>80%) =3
Intensity of staining: none = 0, poor= 1, fair =visible but not obscuring the vasculature, good= visible and obscuring the vasculature.
- Adenoma detection rate [ Time Frame: 2 weeks ]
- Total number of non rectal serrated polyps detected [ Time Frame: 2 weeks ]
- Total number of sessile serrated adenoma detected [ Time Frame: 2 weeks ]
|Study Start Date:||May 2013|
|Study Completion Date:||July 2014|
|Primary Completion Date:||July 2014 (Final data collection date for primary outcome measure)|
Active Comparator: chromoendoscopy
The intervention arm will have Indigo carmine added to the colonic preperation to perform chromoendoscopy
Drug: Chromoendoscopy (Indigo Carmine)
Indigo Carmine will be added to the colonic prep to attempt indirect chromoendoscopy
The control arm will have minimal Indigo carmine added to the colonic prep in a concentration which will not be enough to perform chromoendoscopy
The control will have minimal Indigo Carmine added to the colonic prep. This will serve to color the solution blue for blinding but not enough to provide significant staining for chromoendoscopy.
Please refer to this study by its ClinicalTrials.gov identifier: NCT01901510
|United States, Arizona|
|Mayo Clinic in Arizona|
|Scottsdale, Arizona, United States, 85259|
|Principal Investigator:||M Harrison, MD||Mayo Clinic|