Carbon dioxide insufflation for colonoscopy: a randomized, double-blind, controlled trial

Carbon dioxide insufflation for colonoscopy: a randomized, double-blind, controlled trial - Carbon dioxide insufflation for colonoscopy: a randomized, double-blind, controlled trial

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000002777

Enrollment

100

Registered

2009-11-21

Start date

2009-01-01

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None

Interventions

Study group: carbon dioxide insufflation in colonoscopy Control group: air insufflation in colonoscopy

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Patients undergoing colonoscopy at Akita Red Cross Hospital, who submitted written informed consent. Patients must be at least 20 years old when submitting written informed consent. No criteria for gender.

Exclusion criteria

Exclusion criteria: Patients with a prior colonic resection or severe heart disease or lung disease and those undergoing treatment for a malignant disease are excluded from the present study. Patients with active gastrointestinal bleeding or intestinal obstruction requiring colonoscopic lavage during examination are excluded.

Design outcomes

Primary

Measure	Time frame
Time to reach cecum; total time of examination; abdominal pain immediately after, 30 after, 1 hour after, 6 hours after, 24 hours after examination by questionnaire; gas volume, examination time; transcutaneous partial CO2 before, during (peak value) and 30 minutes after examination; gas volume	—

Secondary

Measure	Time frame
Side effect	—

Countries

Japan

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026