Independent directory Public ClinicalTrials.gov records United States
Clinical Trials Finder
Objective public record navigation
Search Results

Search by objective public record fields.

Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results are retrieved from ClinicalTrials.gov and synchronized into the directory. Search pages remain noindex by default.

Clear filters
ClinicalTrials.gov public records Last synced Sep 5, 2026, 11:34 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 1–24 of 92 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Intervention: Carbon dioxide method Clear all
Completed Not applicable Interventional Results available

A Trial To Assess Risk of Delirium in Older Adults Undergoing Hip Fracture Surgery With Spinal or General Anesthesia

NCT02190903
View directory record Official record
Conditions
Postoperative Complications, Hip Fracture, Delirium
Interventions
General endotracheal anesthesia, Regional (spinal) Anesthesia
Other
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 29, 2018 · Synced Sep 5, 2026, 11:34 AM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

Retinal Blood Flow and Autoregulation

NCT05344274
View directory record Official record
Conditions
Glaucoma
Interventions
Indocyanine Green Angiography, Isocapnic Oxygen, Ocular Imaging with Optical Coherence Tomography (OCT) and Adaptive Optics (AO)
Diagnostic Test · Biological
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years to 88 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
4
States / cities
Baltimore, Maryland • Silver Spring, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 1, 2025 · Synced Sep 5, 2026, 11:34 AM EDT
Terminated Phase 3 Interventional Accepts healthy volunteers

Comparison of Adenoma Detection Rate Among Water, Carbon Dioxide and Air Methods of Minimal Sedation Colonoscopy

NCT01782014
View directory record Official record
Conditions
Screening Colonoscopy
Interventions
colonoscopy
Procedure
Lead sponsor
Loma Linda University
Other
Eligibility
18 Years to 80 Years
Enrollment
450 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
Loma Linda, California
Source: ClinicalTrials.gov public record
Updated Jan 31, 2016 · Synced Sep 5, 2026, 11:34 AM EDT
Completed Phase 2Phase 3 Interventional

Cyrotherapy vs. APC in GAVE

NCT00587405
View directory record Official record
Conditions
Watermelon Stomach
Interventions
cryotherapy, Argon Plasma Coagulation
Procedure
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 85 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 6, 2016 · Synced Sep 5, 2026, 11:34 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Chemoreflex and Baroreflex Alterations Causing Postural Tachycardia Syndrome With Orthostatic Hyperpnea and Hypocapnia

NCT05923840
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome, Hypocapnia, Hyperventilation
Interventions
Chemoreflex Testing, Baroreflex testing, Orthostatic stress testing
Diagnostic Test
Lead sponsor
New York Medical College
Other
Eligibility
15 Years to 39 Years · Female only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Hawthorne, New York
Source: ClinicalTrials.gov public record
Updated Jun 27, 2023 · Synced Sep 5, 2026, 11:34 AM EDT
Not listed Not applicable Interventional

Correlation of CO2 Measured by Blood Gas vs Transcutaneous Monitor

NCT03268395
View directory record Official record
Conditions
Respiratory Complication
Interventions
Arterial Blood Gas and Transcutaneous CO2 Monitor
Diagnostic Test
Lead sponsor
Memorial Health University Medical Center
Other
Eligibility
Not listed
Enrollment
266 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Savannah, Georgia
Source: ClinicalTrials.gov public record
Updated Aug 30, 2017 · Synced Sep 5, 2026, 11:34 AM EDT
Active, not recruiting No phase listed Observational

Transcutaneous Carbon Dioxide Monitoring in Neonates Receiving Therapeutic Hypothermia for Neonatal Encephalopathy

NCT04603547
View directory record Official record
Conditions
Neonatal Encephalopathy
Interventions
Transcutaneous Carbon Dioxide Monitoring
Device
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
0 Days to 3 Days
Enrollment
53 participants
Timeline
2019 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 24, 2026 · Synced Sep 5, 2026, 11:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

COSMED K5 Validation and Reliability Study

NCT05145192
View directory record Official record
Conditions
Cardiopulmonary, Exercise
Interventions
COSMED K5 CPET (Cardiopulmonary Exercise Test), ParvoMedics CPET
Device
Lead sponsor
Baylor Research Institute
Other
Eligibility
20 Years to 29 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Frisco, Texas
Source: ClinicalTrials.gov public record
Updated Jan 21, 2025 · Synced Sep 5, 2026, 11:34 AM EDT
Completed Not applicable Interventional Results available

A Study to Determine if Carbon Dioxide Lavage During Total Knee Surgery Reduces Intraoperative Embolic Events

NCT00736125
View directory record Official record
Conditions
Postoperative Complications, Memory Disorders
Interventions
pulsatile saline lavage, carbon dioxide lavage
Device
Lead sponsor
Kinamed Incorporated
Industry
Eligibility
50 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 25, 2019 · Synced Sep 5, 2026, 11:34 AM EDT
Terminated Phase 2 Interventional

S9709, Laser Surgery Plus Radiation Therapy in Treating Patients With Early Stage Cancer of the Larynx

NCT00003040
View directory record Official record
Conditions
Head and Neck Cancer
Interventions
laser surgery, radiation therapy
Procedure · Radiation
Lead sponsor
SWOG Cancer Research Network
Network
Eligibility
18 Years and older
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1997 – 2007
U.S. locations
12
States / cities
Little Rock, Arkansas • Los Angeles, California • Sacramento, California + 9 more
Source: ClinicalTrials.gov public record
Updated Jun 14, 2012 · Synced Sep 5, 2026, 11:34 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Comparision of Air Versus CO2 for Distention During Sigmoidoscopy

NCT00771290
View directory record Official record
Conditions
Colorectal Surgery
Interventions
Air insufflation with standard endoscopy unit, CO2 insufflation for colonoscopy (special CO2 insufflation unit)
Procedure
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 30, 2024 · Synced Sep 5, 2026, 11:34 AM EDT
Terminated No phase listed Observational

Use Of Capnography As Surrogate Measure Of PC02 In Medical Intensive Care Unit (ICU) Patients

NCT00744614
View directory record Official record
Conditions
Asthma, Chronic Obstructive Pulmonary Disease, Interstitial Lung Disease
Interventions
Capnography
Procedure
Lead sponsor
Lahey Clinic
Other
Eligibility
18 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
1
States / cities
Burlington, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 20, 2010 · Synced Sep 5, 2026, 11:34 AM EDT
Withdrawn Not applicable Interventional

Sleep Ventilation for Patients With Advanced Hypercapnic COPD

NCT04210050
View directory record Official record
Conditions
COPD
Interventions
Home noninvasive nocturnal ventilation with Breas VIVO 50 home ventilator or newer model as available, Breas Medical., Arterial blood gas (ABG) and serum bicarbonate level, Overnight home oximetry and transcutaneous CO2 monitoring
Device · Diagnostic Test
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 3, 2023 · Synced Sep 5, 2026, 11:34 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

COPD-Related Physiology and the Brain

NCT03269721
View directory record Official record
Conditions
Pulmonary Disease, Chronic Obstructive (COPD), Cognitive Impairment
Interventions
Neuropsychological Assessment, Spirometry, Arterial Blood Gas, Diffusion Capacity of the Lung for Carbon Monoxide, 6 Minute Walk Test, Systemic Vascular Measures, Blood Biomarkers, Symptom Questionnaire Measures, Brain MRI
Behavioral · Procedure · Diagnostic Test + 1 more
Lead sponsor
Karin Hoth
Other
Eligibility
30 Years to 85 Years
Enrollment
170 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2025
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Dec 23, 2025 · Synced Sep 5, 2026, 11:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Improvised Explosive Device (IED) Level Blasting of Human Blood With Slosh Prevention

NCT03018548
View directory record Official record
Conditions
Brain Injuries
Interventions
blood draw
Other
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 23, 2020 · Synced Sep 5, 2026, 11:34 AM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers

Cerebrovascular Reactivity Assessed With fNIRS as a Biomarker of TCVI After Acute Traumatic Brain Injury in Military

NCT04058132
View directory record Official record
Conditions
Traumatic Brain Injury
Interventions
Sildenafil Citrate 50Mg Tab, functional Near-infrared Spectroscopy (fNIRS), Carbon Dioxide (CO2) 5%, Neuropsychological Assessments, Gadolinium contrast infusion, Blood sample collection for research purposes, Structural brain Magnetic Resonance Imaging (MRI
Drug · Device · Other + 1 more
Lead sponsor
Uniformed Services University of the Health Sciences
Federal
Eligibility
18 Years to 55 Years
Enrollment
1 participant
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 27, 2024 · Synced Sep 5, 2026, 11:34 AM EDT
Active, not recruiting Phase 4 Interventional

Helicobacter Pylori Screening and Treatment in the At-risk South Florida Community-AIM 2

NCT07224048
View directory record Official record
Conditions
H. Pylori Infection, Gastric Cancer, Gastritis H Pylori
Interventions
PYTEST® 14C-Urea Capsule Breath Test (at Home), PYTEST® 14C-Urea Capsule Breath Test (Standard Retesting In-Person)
Drug
Lead sponsor
University of Miami
Other
Eligibility
18 Years and older
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Feb 16, 2026 · Synced Sep 5, 2026, 11:34 AM EDT
Not listed Not applicable Interventional

Comparison of the Atmo Motility Gas Capsule System to the Reference Standard

NCT05718505
View directory record Official record
Conditions
Gastroparesis, Slow Transit Constipation, IBS
Interventions
Atmo Motility Gas Capsule System, SmartPill Monitoring System
Device
Lead sponsor
Atmo Biosciences Pty Ltd
Industry
Eligibility
22 Years to 80 Years
Enrollment
209 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
2
States / cities
Boston, Massachusetts • Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jan 9, 2024 · Synced Sep 5, 2026, 11:34 AM EDT
Completed Not applicable Interventional

Comparison of Two-hand Mask Ventilation Technique: Standard V-E Versus Reversal V-E Technique

NCT03170037
View directory record Official record
Conditions
Intubation
Interventions
Standard V-E ventilation technique, Reversal V-E ventilation technique
Procedure
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
92 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 16, 2017 · Synced Sep 5, 2026, 11:34 AM EDT
Not listed Phase 1Phase 2 Interventional

Impact of CBD-Rich Oil on Aversive Memory Reconsolidation

NCT04726475
View directory record Official record
Conditions
Anxiety and Fear
Interventions
Interoceptive Aversive Memory Reactivation, Cannabidiol (CBD)-Rich Broad Spectrum Hemp Extract Oil, Placebo Oil
Behavioral · Dietary Supplement
Lead sponsor
University of Texas at Austin
Other
Eligibility
18 Years to 65 Years
Enrollment
96 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Jan 18, 2022 · Synced Sep 5, 2026, 11:34 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

A Comparative Clinical Study to Assess Pain Score and Wound Healing Following Fractional Ablation With a DFG Laser and CO2 Laser

NCT06295471
View directory record Official record
Conditions
Healthy
Interventions
DFG Laser, CO2 Laser, Optical coherence tomography (OCT)
Device
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 27, 2026 · Synced Sep 5, 2026, 11:34 AM EDT
Withdrawn Not applicable Interventional

Assessment of Cerebral Microvascular Circulation

NCT02179840
View directory record Official record
Conditions
Cerebral Microvascular Circulation
Interventions
Mechanical ventilation adjustment
Procedure
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jan 7, 2019 · Synced Sep 5, 2026, 11:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

ChroniSense Polso Wrist Worn Respiration Rate Validation Study

NCT03750344
View directory record Official record
Conditions
Respiratory Rate
Interventions
Diagnostic test
Device
Lead sponsor
ChroniSense Medical Ltd.
Industry
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Louisville, Colorado
Source: ClinicalTrials.gov public record
Updated Feb 4, 2019 · Synced Sep 5, 2026, 11:34 AM EDT
Completed Not applicable Interventional

Comparison of Methods to Distend the Colon During Insertion: CO2, Air Insufflation, Water-aided Colonoscopy

NCT01954862
View directory record Official record
Conditions
Pain, Colorectal Adenomas, Colorectal Cancer
Interventions
Air Insufflation method., CO2 insufflation, Water Immersion/CO2, Water Exchange/CO2, Water Immersion/AI, Water Exchange/AI
Other
Lead sponsor
Presidio Ospedaliero Santa Barbara
Other
Eligibility
18 Years to 85 Years
Enrollment
624 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jul 30, 2014 · Synced Sep 5, 2026, 11:34 AM EDT