Real-time Feedback of Red-out Within Colonoscopy Intubation

Inclusion Criteria: 1. Study Participants (Patients): Aged 18 to 70 years, any gender. Individuals scheduled to undergo diagnostic or screening colonoscopy at the investigational site. 2. Colonoscopists: Expert-level colonoscopists (having performed a total of \>1000 colonoscopy procedures). Right-handed. Exclusion Criteria: 1. Study Participants (Patients): Individuals undergoing the following procedures: cases with a history of colorectal surgery; cases with a history of chemotherapy, raditherapy; cases with a history of abdominal, and/or pelvic surgery; cases with a history of difficult colonoscopies; cases with colorectal tumours and obstructive lesions; cases with colorectal diverticula; cases with ulcerative colitis or Crohn's disease; cases with ischemic bowel disease; cases with colorectal polyposis; cases with melanosis coli; cases undergoing sigmoidoscopy; cases with poor intestional cleanliness (segment Boston bowel preparation scale (BBPS) of \< 2 points, total BBPS of \< 6 points); cases undergoing therapy procedures such as biopsy or CSP during the intubation phase; cases with transparent cap assisted colonoscopy; cases with water-assisted colonoscopy; cases with air insufflation level of M or L; cases failed caecal intubation within 15 min; cases with colonoscope stiffness level \> 0; obese cases or underweight cases; and cases refusing participation. Individuals who decline to provide informed consent. 2. Colonoscopists: Those who have performed fewer than 300 complete colonoscopies in any calendar year within the past three years. Those who decline to participate in the study.