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Showing 1–16 of 16 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: End-Tidal Carbon Dioxide Clear all
Completed No phase listed Observational

End-Tidal Carbon Dioxide as a Measure of Carboxyhemoglobin in Carbon Monoxide Poisoning

NCT01859156
View directory record Official record
Conditions
Carbon Monoxide Exposure
Interventions
Not listed
Lead sponsor
Hennepin Healthcare Research Institute
Other
Eligibility
18 Years and older
Enrollment
151 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2014
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 28, 2014 · Synced Sep 15, 2026, 10:40 AM EDT
Completed Not applicable Interventional

SuperNO2VA Et Versus Oxygen Face Mask During Deep Sedation

NCT05175573
View directory record Official record
Conditions
Hypoxemia
Interventions
SuperNO2VA Et Nasal Positive Pressure Mask, Supplemental Oxygen Face Mask
Device
Lead sponsor
Vyaire Medical
Industry
Eligibility
18 Years and older
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Nov 2, 2022 · Synced Sep 15, 2026, 10:40 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Wearing Masks on End-tidal Carbon Dioxide and Pulse Oximetry

NCT05114993
View directory record Official record
Conditions
Carbon Dioxide
Interventions
wearing a disposable surgical mask
Device
Lead sponsor
Patrick Brooks
Other
Eligibility
2 Years to 80 Years
Enrollment
119 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Springfield, Missouri
Source: ClinicalTrials.gov public record
Updated Aug 23, 2022 · Synced Sep 15, 2026, 10:40 AM EDT
Completed No phase listed Observational

Respiration Measured Via End-tidal CO2 and Spirometry Study (RESPI)

NCT07537478
View directory record Official record
Conditions
Respiration Rate Detection
Interventions
Wearable Respiration mask - exercise, Wearable respiration Mask
Device
Lead sponsor
Boston Scientific Corporation
Industry
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Saint Paul, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 8, 2026 · Synced Sep 15, 2026, 10:40 AM EDT
Completed Not applicable Interventional Results available

Ventilation Strategies, Anesthetic Techniques and Cerebral Oxygenation in the Beach Chair Position

NCT01535274
View directory record Official record
Conditions
Stroke
Interventions
Inspired oxygen fraction / end tidal carbon dioxide
Other
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 85 Years
Enrollment
67 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Apr 5, 2022 · Synced Sep 15, 2026, 10:40 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Comparison of the Classic Face Mask Versus NuMask for Preoxygenation

NCT01865851
View directory record Official record
Conditions
Inspired Oxygen (FIO2), End-tidal Oxygen (ETO2), End-tidal Carbon Dioxide (ETCO2) and Respiratory Rate (RR) Will be Measured Every 30 Seconds
Interventions
Classic Face Mask and NuMask
Device
Lead sponsor
Nimmagadda, Usharani, M.D.
Individual
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Sep 13, 2017 · Synced Sep 15, 2026, 10:40 AM EDT
Not listed No phase listed Observational

Passive Leg Raise and Mini-fluid Challenge Effect on Various Cardiac Output Surrogates for Fluid Responsiveness

NCT06390423
View directory record Official record
Conditions
Fluid Responsiveness
Interventions
Passive leg raise, SVI via bioreactance, Echo based VTI
Diagnostic Test
Lead sponsor
CentraCare
Other
Eligibility
30 Years to 90 Years
Enrollment
64 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Saint Cloud, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 21, 2024 · Synced Sep 15, 2026, 10:40 AM EDT
Completed No phase listed Observational

The Effects of Patient Features on Opioid Induced End-Tidal CO2

NCT01371903
View directory record Official record
Conditions
Opioid Use During Medical Care
Interventions
Not listed
Lead sponsor
Albany Medical College
Other
Eligibility
18 Years and older
Enrollment
278 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Albany, New York
Source: ClinicalTrials.gov public record
Updated Mar 23, 2014 · Synced Sep 15, 2026, 10:40 AM EDT
Completed Not applicable Interventional

The Effects of MAP and EtCO2 on Venous Sinus Pressures

NCT03867461
View directory record Official record
Conditions
Idiopathic Intracranial Hypertension
Interventions
Venous Sinus Stenting, Adjustment to end-tidal carbon dioxide concentrations ( 38-40 mmHg range), Adjustment to Mean Arterial Pressure (100-110 mmHg range), Adjustment to Mean Arterial Pressure (60-80 mmHg range), Adjustment to end-tidal carbon dioxide concentrations (24-26 mmHg range)
Procedure · Other
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated May 11, 2020 · Synced Sep 15, 2026, 10:40 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Hypercapnia: Cognitive Effects and Monitoring

NCT01782625
View directory record Official record
Conditions
Hypercapnia, Exercise, Nitrogen Narcosis, Diving, Immersion
Interventions
NO exercise at depth, exercise at depth
Other
Lead sponsor
Duke University
Other
Eligibility
18 Years to 50 Years · Male only
Enrollment
58 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2016
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated May 24, 2016 · Synced Sep 15, 2026, 10:40 AM EDT
Active, not recruiting No phase listed Observational

End-Tidal CO2 (ETCO2) Trends in Out-of-Hospital Cardiac Arrest

NCT07632430
View directory record Official record
Conditions
Prehospital Resuscitation, End-Tidal Carbon Dioxide, Cardiac Arrest, Out-Of-Hospital, Prehospital Emergency Medical Services
Interventions
Not listed
Lead sponsor
Office of the Medical Director for EMS in Oklahoma City and Tulsa
Other
Eligibility
18 Years and older
Enrollment
3,500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Jun 8, 2026 · Synced Sep 15, 2026, 10:40 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

End Tidal CO2 and Masks: Is There a Correlation?

NCT06437301
View directory record Official record
Conditions
Hypercapnia
Interventions
Baseline measure of ETCO2 without mask, Baseline ETCO2 with mask, ETCO2 after 200 meter walk with mask, ETCO2 after 200 meter walk without mask
Other
Lead sponsor
CHRISTUS Health
Other
Eligibility
18 Years to 75 Years
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Corpus Christi, Texas
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Sep 15, 2026, 10:40 AM EDT
Recruiting No phase listed Observational

Waveform Capnography Compared to Colorimetric Carbon Dioxide Detection During Tracheal Intubation of Critically Ill Adults

NCT06934876
View directory record Official record
Conditions
Acute Respiratory Failure
Interventions
Colorimetric carbon dioxide (CO2) detection, Waveform capnography
Diagnostic Test
Lead sponsor
Brian Driver
Other
Eligibility
18 Years and older
Enrollment
2,092 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
9
States / cities
Chicago, Illinois • Burlington, Massachusetts • Minneapolis, Minnesota + 6 more
Source: ClinicalTrials.gov public record
Updated May 10, 2026 · Synced Sep 15, 2026, 10:40 AM EDT
Completed Not applicable Interventional Results available

Quantitative End Tidal CO2 Monitoring in the Delivery Room (DR)

NCT01381068
View directory record Official record
Conditions
Delivery Room Resuscitation
Interventions
End tidal CO2 monitor
Device
Lead sponsor
Neil Finer
Other
Eligibility
Up to 15 Minutes
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Dec 16, 2019 · Synced Sep 15, 2026, 10:40 AM EDT
Completed Phase 4 Interventional Results available

Safety Study of Analgesia After Craniotomy Surgery With End Tidal (ET) Carbon Dioxide (CO2) Monitoring

NCT01327677
View directory record Official record
Conditions
Pain
Interventions
Fentanyl
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 80 Years
Enrollment
137 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated May 30, 2017 · Synced Sep 15, 2026, 10:40 AM EDT
Completed Not applicable Interventional Results available

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

NCT04541667
View directory record Official record
Conditions
Endoscopy
Interventions
Air, Carbon Dioxide
Other
Lead sponsor
University of Nebraska
Other
Eligibility
6 Months to 19 Years
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Oct 9, 2023 · Synced Sep 15, 2026, 10:40 AM EDT