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CompletedNCT04541667ETCO2Updated Oct 10, 2023Results posted

Is End Tidal CO2 Level Elevation During Upper Endoscopy With CO2 Gas Insufflation Physiologically Significant

An interventional study of Air and Carbon Dioxide in Endoscopy, sponsored by University of Nebraska. Completed at 1 site in United States. Open to participants aged 6 Months to 19 Years. Per ClinicalTrials.gov, last updated 2023-10-10.

Sponsored by University of Nebraska · Not applicable, Interventional, and Treatment

From the registry’s dates

  • Registered 9 months after the study started (first participant enrolled Nov 2019, registered Sep 2020).
Phase
Not applicable
Study type
Interventional
Enrollment
200
Allocation
Randomized
Ages
6 Months to 19 Years
Sex
All
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Study summary

During the course of an endoscopic procedure, air has historically been used to inflate the lumen to provide adequate visualization and allow for the endoscope to advance as necessary. In many adult centers, carbon dioxide is used for insufflation for all procedures. Many pediatric centers have started using carbon dioxide for insufflation during endoscopy based on the adult studies. Few pediatric studies have been done. This study is designed to test whether carbon dioxide is associated with any negative, post-procedural, outcomes in pediatric patients.

Read the detailed description

Luminal inflation is essential for adequate visualization and endoscope advancement during endoscopy. Although air has previously been the standard gas used, CO2 is increasing preferred in adult endoscopy centers, due to reports of decreased post-procedural abdominal discomfort compared to air. Few published studies in children demonstrated decreased abdominal discomfort with use of CO2, but safety concerns for its use in pediatric endoscopy remain.

This is a Double-blinded, prospective, randomized study of all pediatric patients undergoing procedures involving upper endoscopy in the Childrens Hospital \& Medical Center. Randomization will be for patients undergoing upper endoscopy related procedures. Patients will be randomized 1:1 for air or CO2. Vital signs will be recorded before the procedure, throughout the procedure and after the procedure until fully awake. While in the procedure room, end-tidal CO2 level will be continuously recorded.

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Conditions studied

  • Endoscopy

Keywords

  • upper endoscopy
  • endoscope
  • abdominal discomfort
  • insufflation
  • carbon dioxide
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In context

Lead sponsor

University of Nebraska is the lead sponsor of 473 studies on the registry; 66 are open to participants now.

Of its 75 completed or terminated interventional studies of FDA-regulated products, 46 (61%) have results posted.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
6 Months to 19 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Children 6 months to 19 years old and
  • Undergoing upper endoscopy at Children's Hospital \& Medical Center in Omaha, NE and
  • Parents or legal guardians consent to the study

Exclusion criteria

Exclusion Criteria:

  • Patients and legal guardians who decline participation in the study
  • Patients with chronic respiratory disease (defined as severe asthma, bronchopulmonary dysplasia and cystic fibrosis-related pulmonary disease)
  • Patients with cyanotic heart disease
  • Patients with an ASA status of ≥ 3.
  • Patients who are wards of the state or in foster care
  • Prisoners
  • Patients undergoing colonoscopy only procedures or procedures not related to upper endoscopy
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Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
200 participants (actual)

Study arms

  • Active comparator
    Air for luminal inflation

    Patients randomized into this arm will have luminal inflation using air.

    Other: Air

  • Active comparator
    Carbon Dioxide for luminal inflation

    Patients randomized into this arm will have luminal inflation using carbon dioxide.

    Other: Carbon Dioxide

Interventions

  • OtherAir

    Air will be used for luminal inflation.

    Also known as: Gas

  • OtherCarbon Dioxide

    Carbon dioxide will be used for luminal inflation.

    Also known as: Gas

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What researchers measure

Primary outcomes

  1. Number of Procedures With Elevated End-tidal CO2 Levels

    Compare the peak end-tidal CO2 levels (\>/= 60 mmHg) observed during endoscopy in children managed with endotracheal intubation or laryngeal mask airway using CO2 versus air

    Time frame: Measured from time of procedure start to time of procedure conclusion this lasts usually from 1-2.5 hours.

Secondary outcomes

  1. Number of Participants Reporting Abdominal Pain

    Pain rating scales using FLACC and VAS will be used to assess self reported pain before and after the procedure

    Time frame: This will be assessed before and after the procedure

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Results

Posted Feb 15, 2023

Participant flow

Participant flow — Overall Study
MilestoneAir for Luminal InflationCarbon Dioxide for Luminal Inflation
Started98102
Completed98102
Not completed00

Outcome measures

PrimaryNumber of Procedures With Elevated End-tidal CO2 Levels

Compare the peak end-tidal CO2 levels (\>/= 60 mmHg) observed during endoscopy in children managed with endotracheal intubation or laryngeal mask airway using CO2 versus air

Time frame:
Measured from time of procedure start to time of procedure conclusion this lasts usually from 1-2.5 hours.
Reported as:
Count of units · Procedures
Number of Procedures With Elevated End-tidal CO2 Levels
ProceduresAir for Luminal InflationCarbon Dioxide for Luminal Inflation
Number of Procedures With Elevated End-tidal CO2 Levels821
SecondaryNumber of Participants Reporting Abdominal Pain

Pain rating scales using FLACC and VAS will be used to assess self reported pain before and after the procedure

Time frame:
This will be assessed before and after the procedure
Reported as:
Number · participants
Number of Participants Reporting Abdominal Pain
participantsAir for Luminal InflationCarbon Dioxide for Luminal Inflation
Number of Participants Reporting Abdominal Pain1415

Adverse events

Collected over Procedure duration which lasts between 1-2.5 hours. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Air for Luminal Inflation0/98 (0%)0/98 (0%)5/98 (5.1%)
Carbon Dioxide for Luminal Inflation0/102 (0%)0/102 (0%)5/102 (4.9%)
Most frequent other events
Most frequent other events
EventAir for Luminal InflationCarbon Dioxide for Luminal Inflation
HypotensionVascular disorders2/983/102
HypertensionVascular disorders2/982/102
TachypneaRespiratory, thoracic and mediastinal disorders1/980/102

Baseline characteristics

Population was mostly female, Caucasians and older children

Age, Continuous
Age, Continuous(years)Air for Luminal InflationCarbon Dioxide for Luminal InflationTotal
Median12 (0 to 19)12 (1 to 19)12 (0 to 19)
Sex: Female, Male
Sex: Female, Male(Procedures)Air for Luminal InflationCarbon Dioxide for Luminal InflationTotal
Female5856114
Male404686
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Procedures)Air for Luminal InflationCarbon Dioxide for Luminal InflationTotal
Hispanic or Latino6612
Not Hispanic or Latino9296188
Unknown or Not Reported000
Race (NIH/OMB)
Race (NIH/OMB)(Procedures)Air for Luminal InflationCarbon Dioxide for Luminal InflationTotal
American Indian or Alaska Native000
Asian000
Native Hawaiian or Other Pacific Islander000
Black or African American101
White8484168
More than one race61016
Unknown or Not Reported7815
Region of Enrollment
Region of Enrollment(participants)Air for Luminal InflationCarbon Dioxide for Luminal InflationTotal
United States98102200
BMI z score
BMI z score(units on a scale)Air for Luminal InflationCarbon Dioxide for Luminal InflationTotal
Median0.23 (-3.86 to 2.94)0.61 (-2.90 to 2.72)0.23 (-3.86 to 2.94)
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Study locations

1 site
  • Children's Hospital & Medical Center
    Omaha, Nebraska 68114, United States
09

References and documents

Publications

  • Steppan J, Hogue CW Jr. Cerebral and tissue oximetry. Best Pract Res Clin Anaesthesiol. 2014 Dec;28(4):429-39. doi: 10.1016/j.bpa.2014.09.002. Epub 2014 Sep 28. PubMed 25480772 ↗
  • ASGE Technology Committee; Lo SK, Fujii-Lau LL, Enestvedt BK, Hwang JH, Konda V, Manfredi MA, Maple JT, Murad FM, Pannala R, Woods KL, Banerjee S. The use of carbon dioxide in gastrointestinal endoscopy. Gastrointest Endosc. 2016 May;83(5):857-65. doi: 10.1016/j.gie.2016.01.046. Epub 2016 Mar 3. No abstract available. PubMed 26946413 ↗
  • Chen SW, Hui CK, Chang JJ, Lee TS, Chan SC, Chien CH, Hu CC, Lin CL, Chen LW, Liu CJ, Yen CL, Hsieh PJ, Liu CK, Su CS, Yu CY, Chien RN. Carbon dioxide insufflation during colonoscopy can significantly decrease post-interventional abdominal discomfort in deeply sedated patients: A prospective, randomized, double-blinded, controlled trial. J Gastroenterol Hepatol. 2016 Apr;31(4):808-13. doi: 10.1111/jgh.13181. PubMed 26421801 ↗
  • Liu X, Liu D, Li J, Ou D, Zhou Z. [Safety and efficacy of carbon dioxide insufflation during colonoscopy]. Zhong Nan Da Xue Xue Bao Yi Xue Ban. 2009 Aug;34(8):825-9. Chinese. PubMed 19734597 ↗
  • Lynch I, Hayes A, Buffum MD, Conners EE. Insufflation using carbon dioxide versus room air during colonoscopy: comparison of patient comfort, recovery time, and nursing resources. Gastroenterol Nurs. 2015 May-Jun;38(3):211-7. doi: 10.1097/SGA.0000000000000109. PubMed 25946475 ↗
  • Memon MA, Memon B, Yunus RM, Khan S. Carbon Dioxide Versus Air Insufflation for Elective Colonoscopy: A Meta-Analysis and Systematic Review of Randomized Controlled Trials. Surg Laparosc Endosc Percutan Tech. 2016 Apr;26(2):102-16. doi: 10.1097/SLE.0000000000000243. PubMed 26841319 ↗
  • Riss S, Akan B, Mikola B, Rieder E, Karner-Hanusch J, Dirlea D, Mittlbock M, Weiser FA. CO2 insufflation during colonoscopy decreases post-interventional pain in deeply sedated patients: a randomized controlled trial. Wien Klin Wochenschr. 2009;121(13-14):464-8. doi: 10.1007/s00508-009-1202-y. PubMed 19657610 ↗
  • Sajid MS, Caswell J, Bhatti MI, Sains P, Baig MK, Miles WF. Carbon dioxide insufflation vs conventional air insufflation for colonoscopy: a systematic review and meta-analysis of published randomized controlled trials. Colorectal Dis. 2015 Feb;17(2):111-23. doi: 10.1111/codi.12837. PubMed 25393051 ↗
  • Singh R, Neo EN, Nordeen N, Shanmuganathan G, Ashby A, Drummond S, Nind G, Murphy E, Luck A, Tucker G, Tam W. Carbon dioxide insufflation during colonoscopy in deeply sedated patients. World J Gastroenterol. 2012 Jul 7;18(25):3250-3. doi: 10.3748/wjg.v18.i25.3250. PubMed 22783048 ↗
  • Homan M, Mahkovic D, Orel R, Mamula P. Randomized, double-blind trial of CO2 versus air insufflation in children undergoing colonoscopy. Gastrointest Endosc. 2016 May;83(5):993-7. doi: 10.1016/j.gie.2015.08.073. Epub 2015 Sep 10. PubMed 26363332 ↗
  • Kresz A, Mayer B, Zernickel M, Posovszky C. Carbon dioxide versus room air for colonoscopy in deeply sedated pediatric patients: a randomized controlled trial. Endosc Int Open. 2019 Feb;7(2):E290-E297. doi: 10.1055/a-0806-7060. Epub 2019 Jan 30. PubMed 30705964 ↗
  • Thornhill C, Navarro F, Alabd Alrazzak B, Hashmi SS, DebRoy AN, Rhoads JM, Imseis E. Insufflation With Carbon Dioxide During Pediatric Colonoscopy for Control of Postprocedure Pain. J Clin Gastroenterol. 2018 Sep;52(8):715-720. doi: 10.1097/MCG.0000000000000910. PubMed 29210902 ↗
  • Eastwood GM, Tanaka A, Bellomo R. Cerebral oxygenation in mechanically ventilated early cardiac arrest survivors: The impact of hypercapnia. Resuscitation. 2016 May;102:11-6. doi: 10.1016/j.resuscitation.2016.02.009. Epub 2016 Feb 21. PubMed 26903288 ↗
  • Erdogan S, Oto A, Bosnak M. Reliability of cerebral oximeter in non-invasive diagnosis and follow-up of hypercapnia. Turk J Pediatr. 2016;58(4):389-394. doi: 10.24953/turkjped.2016.04.007. PubMed 28276211 ↗

Study documents

  • Protocol and statistical analysis plan · Jun 3, 2021
  • Informed consent form · Apr 26, 2022

Documents are hosted by the registry — open the source record to download them.

Individual participant data

Plan to share: No

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 10, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT04541667
Lead sponsor
University of Nebraska
Collaborators
Children's Hospital and Medical Center, Omaha, Nebraska
Responsible party
Sponsor
First posted
Sep 9, 2020
Start date
Nov 18, 2019
Primary completion
Jul 31, 2021
Completion
May 31, 2022
Results posted
Feb 15, 2023
Last update
Oct 10, 2023

Study contacts

Chinenye R Dike, MD
principal investigator · Children's Hospital & Medical Center / University of Nebraska Medical Center

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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