Sponsor has terminated study due to COVID-19 related concerns

The primary objective of this multi-center, prospective, randomized controlled trial is to evaluate the bowel cleansing after Pure-Vu use in outpatient subjects at high risk for inadequate colon preparation as compare to standard of care.

Total of 88 subjects (44 per arm) at high risk for inadequate colon preparation will be randomized and undergo procedure either in the Control arm (standard of care) or with the Pure-Vu System.

Subjects will be enrolled at up to 4 clinical sites in the United States.

primary endpoint- A comparison between the two study arms (i.e., Pure-Vu vs. standard colonoscopy) of the rate of overall cleansing as well as cleansing per segment will be evaluated by the BBPS scoring index (Bowel preparation adequacy defined as BBPS >2 in each segment)

The following secondary endpoints will be determined:

1. Assess the willingness of consented subjects to pay for Pure-Vu prior to colonoscopy
2. Colonoscopy procedural measures for Intervention and Control arms
3. Endoscopists' experience
4. Safety assessment for all subjects on the day of procedure per endoscopist
5. Post-colonoscopy patient experience and safety check with scripted phone call 1-3 days after colonoscopy
6. Assess the willingness of consented subjects to pay for the Pure-Vu System 1-3 days after colonoscopy

Follow-up call will be conducted 1-3 business days after the procedure to verify that there has been no change in their clinical status and record their willingness to use the Pure-Vu System in the future.

Inclusion Criteria:

1. Adults > age 22
2. Elective outpatient colonoscopy by participating gastroenterologist
3. Stool clarity grade 1-3 at presentation for colonoscopy

Exclusion Criteria:

1. Not competent to consent
2. Bleeding disorder - known or suspected
3. Hereditary Gastrointestinal Cancer syndrome
4. Known PT INR > 1.5
5. Know elevated PTT
6. Anti-platelet agent or anticoagulant (other than aspirin or nonsteroidal agent) which has not been stopped for the colonoscopy
7. Known platelet count < 50,000
8. Known absolute neutrophil count < 1,000
9. History of surgical colon resection
10. Pre-colonoscopy intent to enter terminal ileum
11. Prior incomplete colonoscopy due to technical & non-bowel preparation related reasons
12. Regular use of non-topical steroid
13. Pregnant
14. Prisoner or institutionalized for any reason
15. Psychiatric illness greater than mild
16. Colonoscopy without anesthesia administered (MAC) sedation
17. Diverticulitis
18. Active inflammatory bowel disease (Crohn's, Ulcerative Colitis, or Indeterminate)
19. Known or suspected colon stricture

The Colonoscope will be prepared as per normal routine and the research assistant will cover the colonoscope before the patient enters the endoscopy room to keep him/her blinded to the study arm. This is uncovered once the patient is sedated.