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Showing 1–24 of 348 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Normal Breathing Clear all
Recruiting Phase 2Phase 3 Interventional Accepts healthy volunteers

Inhaled Isopropyl Alcohol for Treatment of Nausea

NCT05418244
View directory record Official record
Conditions
Vomiting, Nausea, Children, Only
Interventions
Inhaled Isopropyl Alcohol, Oral Ondansetron, Inhaled Placebo
Other · Drug
Lead sponsor
State University of New York at Buffalo
Other
Eligibility
7 Years to 17 Years
Enrollment
84 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Oct 7, 2025 · Synced Sep 5, 2026, 10:15 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

University of Wisconsin Severe Asthma Research Program III

NCT01760915
View directory record Official record
Conditions
Asthma
Interventions
NC100182 Hyperpolarized 3He
Other
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
6 Years and older
Enrollment
107 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2021
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Aug 1, 2023 · Synced Sep 5, 2026, 10:15 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Healthy Normal Volunteers Looking at Exposure and Effects of Multiple Doses of Technosphere® Insulin (TI) Using the Gen2C Inhaler

NCT01490762
View directory record Official record
Conditions
Healthy
Interventions
Technosphere Insulin Inhalation Powder using the Gen2C inhaler, Regular Human Insulin
Drug
Lead sponsor
Mannkind Corporation
Industry
Eligibility
18 Years to 55 Years
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Chula Vista, California
Source: ClinicalTrials.gov public record
Updated Sep 6, 2012 · Synced Sep 5, 2026, 10:15 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Targeting Breathing Limitations to Improve Functional Outcomes in HFpEF

NCT05723679
View directory record Official record
Conditions
Heart Failure With Preserved Ejection Fraction, Obesity
Interventions
HeO2 gas mixture, Room air gas mixture
Other
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
55 Years to 90 Years
Enrollment
78 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2029
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated May 6, 2026 · Synced Sep 5, 2026, 10:15 PM EDT
Withdrawn Not applicable Interventional

Individualized vs Low PEEP in One Lung Ventilation

NCT03569774
View directory record Official record
Conditions
One-Lung Ventilation, Obesity, Lung Diseases
Interventions
One-lung ventilation with individualized PEEP, One-lung ventilation with low PEEP
Procedure
Lead sponsor
Dionne Peacher
Other
Eligibility
18 Years to 80 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Jul 5, 2021 · Synced Sep 5, 2026, 10:15 PM EDT
Completed Not applicable Interventional Results available

Pelvic Floor Physical Therapy vs Standard Care in Transgender Women Undergoing Vaginoplasty for Gender Affirmation

NCT05690555
View directory record Official record
Conditions
Pelvic Floor Disorders
Interventions
Preoperative and Postoperative Pelvic Floor Physical Therapy (PFPT), No Pelvic Floor Physical Therapy (PFPT), Postoperative PFPT
Other
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years and older · Male only
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 14, 2025 · Synced Sep 5, 2026, 10:15 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Mechanisms of Endothelial Cell Dysfunction in Sleep Apnea

NCT00859950
View directory record Official record
Conditions
Obstructive Sleep Apnea, Hypoxemia
Interventions
Continuous Positive Airway Pressure (CPAP)
Device
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
21 Years and older
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2015
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 3, 2019 · Synced Sep 5, 2026, 10:15 PM EDT
Not listed No phase listed Observational

The Diabetic Foot Ulcer Registry

NCT02813161
View directory record Official record
Conditions
Diabetic Foot Ulcer Outcome, Quality of Patient Care
Interventions
cellular and tissue based therapy, negative pressure wound therapy, debridement, advanced wound therapy, Nutritional screening, off-loading, Hyperbaric oxygen Therapy
Biological · Device · Procedure + 1 more
Lead sponsor
U.S. Wound Registry
Other
Eligibility
Not listed
Enrollment
10,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2025
U.S. locations
1
States / cities
The Woodlands, Texas
Source: ClinicalTrials.gov public record
Updated May 2, 2018 · Synced Sep 5, 2026, 10:15 PM EDT
Completed No phase listed Observational

Work of Breathing in Term Infants

NCT05209269
View directory record Official record
Conditions
Work of Breathing, Term Infant
Interventions
Work of breathing observation
Other
Lead sponsor
Christiana Care Health Services
Other
Eligibility
1 Day to 1 Week
Enrollment
31 participants
Timeline
2022 – 2023
U.S. locations
1
States / cities
Newark, Delaware
Source: ClinicalTrials.gov public record
Updated Sep 10, 2023 · Synced Sep 5, 2026, 10:15 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Cardiac Autonomic Function in Women with Microvascular Coronary Dysfunction

NCT01568177
View directory record Official record
Conditions
Microvascular Coronary Dysfunction
Interventions
Mental Stress Testing, Peripheral Arterial Tonometry (PAT) Testing, Heart Rate Variability (HRV), RESPeRATE Breathing Trial, SPECT cardiac scan with 123I-mIBG and Myoview
Behavioral · Other · Procedure
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years and older · Female only
Enrollment
105 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2024
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Sep 5, 2026, 10:15 PM EDT
Recruiting Phase 2 Interventional

REGULUS: MRI-guided Adaptive SABR for Liver Cancers

NCT07223307
View directory record Official record
Conditions
Liver Cancer, Intrahepatic Cholangiocarcinoma, Liver Metastases, HCC
Interventions
MRI-guided adaptive stereotactic ablative body radiotherapy (SABR)
Radiation
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Feb 8, 2026 · Synced Sep 5, 2026, 10:15 PM EDT
Terminated Phase 2Phase 3 Interventional Results available

Drug Study of Albuterol to Treat Acute Lung Injury

NCT00434993
View directory record Official record
Conditions
Respiratory Distress Syndrome, Adult
Interventions
Albuterol Sulfate, Mini-Bronchoalveolar Lavage (BAL), Placebo
Drug · Procedure
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
13 Years and older
Enrollment
282 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
40
States / cities
Fresno, California • Sacramento, California • San Francisco, California + 19 more
Source: ClinicalTrials.gov public record
Updated Feb 9, 2017 · Synced Sep 5, 2026, 10:15 PM EDT
Not listed Not applicable Interventional

Augmented Interoceptive Exposure Training in Anorexia Nervosa

NCT03019081
View directory record Official record
Conditions
Anorexia Nervosa
Interventions
Isoproterenol, placebo
Drug · Other
Lead sponsor
Laureate Institute for Brain Research, Inc.
Other
Eligibility
18 Years to 40 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2024
U.S. locations
1
States / cities
Tulsa, Oklahoma
Source: ClinicalTrials.gov public record
Updated Oct 4, 2023 · Synced Sep 5, 2026, 10:15 PM EDT
Terminated Not applicable Interventional Results available

Cycling of Sedative Infusions in Critically Ill Pediatric Patients

NCT01333059
View directory record Official record
Conditions
Respiratory Failure
Interventions
Midazolam, Normal saline, Fentanyl
Drug
Lead sponsor
Javier Gelvez, MD
Other
Eligibility
Up to 18 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
1
States / cities
Fort Worth, Texas
Source: ClinicalTrials.gov public record
Updated Jan 14, 2019 · Synced Sep 5, 2026, 10:15 PM EDT
Completed Phase 1 Interventional

Assessment of Cellular Proliferation in Tumors by Positron Emission Tomography (PET) Using [18F]ISO-1

NCT00968656
View directory record Official record
Conditions
Breast Cancer, Head and Neck Cancer, Diffuse Large B-cell Lymphoma
Interventions
PET/CT, Laboratory Testing, Safety Testing, Immunohistochemistry staining, F-18-ISO
Radiation · Other · Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 8, 2014 · Synced Sep 5, 2026, 10:15 PM EDT
Completed Not applicable Interventional

Calming Alternatives Learned During MRI-Guided Breast Biopsy

NCT03877146
View directory record Official record
Conditions
Breast Cancer, Breast Pain, Pain, Acute, Anxiety, Coping Skills, Self Efficacy
Interventions
Controlled Breathing Intervention
Behavioral
Lead sponsor
Duke University
Other
Eligibility
18 Years and older · Female only
Enrollment
58 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 24, 2020 · Synced Sep 5, 2026, 10:15 PM EDT
Recruiting Not applicable Interventional

Effects of Acute Intermittent Hypoxia on Neuroplasticity in MS

NCT06390930
View directory record Official record
Conditions
Multiple Sclerosis, Multiple Sclerosis, Relapsing-Remitting, Multiple Sclerosis, Secondary Progressive
Interventions
Acute Intermittent Hypoxia, Sham Acute Intermittent Hypoxia
Other
Lead sponsor
Shirley Ryan AbilityLab
Other
Eligibility
18 Years to 75 Years
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 22, 2026 · Synced Sep 5, 2026, 10:15 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of High-Intensity Interval Training (HIT) While in a Hyperoxic-Hyperbaric Environment on Exercise Performance

NCT02941939
View directory record Official record
Conditions
Exercise Performance
Interventions
Hyperbaric chamber, Ambient pressure
Other
Lead sponsor
Intermountain Health Care, Inc.
Other
Eligibility
18 Years to 40 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Murray, Utah
Source: ClinicalTrials.gov public record
Updated May 21, 2018 · Synced Sep 5, 2026, 10:15 PM EDT
Completed No phase listed Observational

Oral and Swallowing Function in Older Adults

NCT06368830
View directory record Official record
Conditions
Oropharyngeal Dysphagia
Interventions
3-ounce water swallow test, Kayser-Jones Brief Oral Health Status Examination (BOHSE), Tongue pressure, Test of Masticating and Swallowing Solids (TOMASS), Respiratory function tests
Diagnostic Test
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
60 Years and older
Enrollment
111 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Aug 9, 2026 · Synced Sep 5, 2026, 10:15 PM EDT
Not yet recruiting Not applicable Interventional

Hyperbaric Oxygen Treatment for Necrotizing Fasciitis and Necrotizing Soft Tissue Infections

NCT07170020
View directory record Official record
Conditions
Necrotizing Fascitis
Interventions
Hyperbaric Oxygen Therapy
Procedure
Lead sponsor
Corewell Health West
Other
Eligibility
18 Years and older
Enrollment
160 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Grand Rapids, Michigan
Source: ClinicalTrials.gov public record
Updated Sep 11, 2025 · Synced Sep 5, 2026, 10:15 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Pharmacokinetic Study in Healthy Volunteers

NCT01365117
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Technosphere® Insulin Inhalation Powder
Drug
Lead sponsor
Mannkind Corporation
Industry
Eligibility
18 Years to 45 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011
U.S. locations
1
States / cities
Neptune City, New Jersey
Source: ClinicalTrials.gov public record
Updated Jun 13, 2012 · Synced Sep 5, 2026, 10:15 PM EDT
Terminated Phase 1 Interventional Results available

Cefiderocol Concentrations in the Lungs of Hospitalized Patients With Bacterial Pneumonia

NCT03862040
View directory record Official record
Conditions
Bacterial Pneumonia
Interventions
Cefiderocol, Standard of Care Antibiotic
Drug
Lead sponsor
Shionogi
Industry
Eligibility
18 Years and older
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019
U.S. locations
7
States / cities
Aurora, Colorado • Hartford, Connecticut • Jacksonville, Florida + 4 more
Source: ClinicalTrials.gov public record
Updated Nov 4, 2020 · Synced Sep 5, 2026, 10:15 PM EDT
Completed Not applicable Interventional

Early Caffeine and LISA Compared to Caffeine and CPAP in Preterm Infants

NCT04209946
View directory record Official record
Conditions
Premature Lungs, Respiratory Distress Syndrome, Surfactant Deficiency Syndrome Neonatal
Interventions
Less Invasive Surfactant Administration LISA, Continuous Positive Airway Pressure CPAP
Procedure
Lead sponsor
Sharp HealthCare
Other
Eligibility
24 Weeks to 29 Weeks
Enrollment
180 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
3
States / cities
Irvine, California • Loma Linda, California • San Diego, California
Source: ClinicalTrials.gov public record
Updated Dec 17, 2025 · Synced Sep 5, 2026, 10:15 PM EDT