- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00745927
Application of CO2 Insufflations in Colonoscopy Randomized Trial
Application of CO2 Insufflations in Colonoscopy Examination-A Single-blinded Randomized Trial
It has been reported that carbon dioxide (CO2) insufflation can reduce patient pain and abdominal discomfort during and after colonoscopy. Its safety and efficacy during colonoscopy even under sedation has been already assessed in some earlier trials. Air insufflation is still the standard method, however, because of a lack of suitable equipment and continued technical improvement in colonoscopy.
In laparoscopic surgery, CO2 insufflation is widely applied and safely used with the patient under general anesthesia. CO2 insufflation is also applied for CT colonography for reduction of discomfort during or after procedure.2 During endoscopic procedure for colorectal neoplasia resection, however, long procedural time may increase not only the degree of discomfort during and after the procedure but also the risk of perforation. In addition to laparoscopic surgery, CO2 insufflation has also been applied to other endoscopic procedures. Saito et al reported the application of CO2 insufflation in Endoscopic submucosal dissection (ESD) of colorectal neoplasia in a prospective study in which their average procedural time using CO2 insufflation was 90 minutes under conscious sedation with average of 5.6 mg of midazolam. When compared with control group using room air, statistically negligible difference of pCO2 was observed with significant difference in abdominal discomfort.6 Screening colonoscopy, which can be completed within 15 minutes if no lesion being detected, requires high screenee satisfaction so as to improve patient compliance. In the setting of colonoscopy after positive FOBT, the attendance rate for secondary colonoscopy was around 60 to 70 % according to the data demonstrated in previous RCT and population-based studies. With application of CO2 insufflation, further improvement of patient compliance can be anticipated.
This study aims to investigate whether use of CO2 insufflations can reduce examinee discomfort in comparison with air.
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
- Setting: Screening colonoscopy or secondary colonoscopy after positive FOBT performed in endoscopic unit of a single university hospital
- Study design: Single blinded randomized trial
- Randomization process: sealed envelope
- Study subjects:
Inclusion criteria: Subjects who receive Screening colonoscopy or secondary colonoscopy Exclusion criteria: subjects who have COPD or cardiovascular diseases
- Study duration: June 2008 to November 2012
Post-colonoscopy discomfort will be measured and obtained from the screenee at several time points using visual analogue pain scoring system:
- Immediately after colonoscopy for non-sedated patients, immediately after awaken from sedation for sedated patients
- 2 hrs after colonoscopy
- 8-12 hours after colonoscopy
Statistical analysis:
- Sample size estimation: according to our previous unpublished data using air insufflations at colonoscopy, mean pain score was 3 and standard deviation was 2.38. Assuming 15% difference of discomfort, sample size up to 171 are required for each group (CO2 vs. air, sedated and non-sedated) in this study. (2 sided test, α=0.05, power=80%)
- Student t-test for pain score comparison
- Ancillary analysis: pCO2, sedation drug dosage, and procedural time in both groups. For TCCO2 comparison, ANOVA for repeated measurement will be used. For variables not normally distributed, Wilcoxon rank sum test wall be used as a supplementary analysis.
- SAS statistical program, version 9.0 (SAS institute Inc., Cary, NC) will be used for all statistical analysis
Study Type
Enrollment (Anticipated)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Han-Mo Chiu, M.D
- Phone Number: 63354 886-2-23123456
- Email: hanmochiu@ntu.edu.tw
Study Locations
-
-
-
Taipei, Taiwan, 100
- Recruiting
- National Taiwan University Hospital
-
Contact:
- Han-Mo Chiu, MD
- Phone Number: 63354 886-2-23123456
- Email: hanmochiu@ntu.edu.tw
-
Principal Investigator:
- Han-Mo Chiu, MD
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Subjects who receive Screening colonoscopy or secondary colonoscopy
Exclusion Criteria:
- Subjects who have COPD or cardiovascular diseases
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Screening
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Triple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
No Intervention: Room air insufflations
Room air will be used for insufflations during colonoscopy
|
|
Active Comparator: CO2 insufflations
CO2 will be used for insufflations during colonoscopy
|
CO2 insufflations during whole procedure of colonoscopy
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Degree of abdominal discomfort during and after colonoscopy
Time Frame: 0, 2, 8-10 hr
|
0, 2, 8-10 hr
|
Secondary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Number of neoplasm detected
Time Frame: At the time of colonoscopy
|
At the time of colonoscopy
|
Collaborators and Investigators
Investigators
- Study Director: Hsiu-Po Wang, MD, National Taiwan University Hospital
Study record dates
Study Major Dates
Study Start
Primary Completion (Anticipated)
Study Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 200802031R
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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