NCT07171853Completed
The Carbon Footprint Study of Colonoscopy
The Carbon Footprint Study of Colonoscopy for Colorectal Cancer Screening and Various Techniques of Colonic Polypectomy
Source: ClinicalTrials.gov · Last updated 4 Aug 2026
Brief summary (registry, in English)
With global warming intensifying, GI endoscopy is among the top three greenhouse gas-emitting medical procedures. Colonoscopy, a cornerstone for colorectal cancer (CRC) screening, significantly contributes to the carbon footprint (CF). This study quantifies CO₂ emissions in different steps of colonoscopy and evaluates the environmental impact of common polypectomy techniques to establish baseline CF data and identify opportunities for mitigation. This study included patients undergoing colonoscopy for CRC screening. CO₂ emissions were comprehensively measured at each step of the procedure (pre-, during, and post-colonoscopy), including energy consumption, all equipment and medications, waste management, and endoscopy reprocessing. Emission data were also collected for common polypectomy techniques, including cold forceps biopsy (CFB), cold snare polypectomy (CSP), hot snare polypectomy (HSP), and hot snare endoscopic mucosal resection (EMR), all performed according to standard polypectomy protocols.
- Status (registry)
- Completed
- Study type
- Observational
- Enrollment
- 362 (actual)
- First submitted
- 6 Sept 2025
- Start date
- 1 Oct 2025
- Primary completion date
- 30 Apr 2026
- Lead sponsor
- King Chulalongkorn Memorial Hospital
- Diseases
- Colorectal cancer
- NCT number
- NCT07171853
What you commit to
- Study type: Observational
- Participants enrolled: 362
- From 1 Oct 2025 to the primary completion date, 30 Apr 2026
- 1 site in 1 country
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Other illness
- Endoscopic JNET type III or suspicion of malignancy
- Emergency colonoscopy, GI bleeding, unstable vital sign, critical ill patient
- Inflammatory bowel disease
- Severe cardiopulmonary disease
- Severe infection
- Malignancy
- History of allergy to IV sedative medication
Lab values
- Hematologic or coagulation disorders, Plt\<140,000/mcL, INR\>1.5
- anti-platelet/anticoagulant medication that could not be paused as recommended in the current guideline
Other
- Patient status grade III-V according to the American Society of Anesthesiologists (ASA)
- Poor bowel preparation (grade \<6 in the Boston Bowel Preparation Scale \[BBPS\])
- Pregnancy
Who the study is looking for
- Patients aged 18-80 years
Age in the registry: 18 years to 80 years · Sex: All · Does not accept healthy volunteers
Sites (1)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| King Chulalongkorn Memorial Hospital Coordinator of this site? Confirm its status | Bangkok | Thailand | Unknown status |
This page is information, not medical advice. Discuss any trial with your doctor.