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Showing 1–24 of 90 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Lung Function Decreased Clear all
Completed No phase listed Observational Accepts healthy volunteers

An Observational Study of Post-cesarean Delivery Respiratory Patterns Using a Non-invasive Minute Ventilation Monitor (Exspiron ™ System)

NCT02903173
View directory record Official record
Conditions
Pregnancy, Analgesia, Respiratory Depression, Obstructive Sleep Apnea, Postpartum
Interventions
Not listed
Lead sponsor
Duke University
Other
Eligibility
18 Years and older · Female only
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2018
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 23, 2019 · Synced Jun 11, 2026, 12:09 AM EDT
Completed No phase listed Observational

Pharmacogenetic Morphine Spine Study

NCT01839461
View directory record Official record
Conditions
Pain
Interventions
Not listed
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
10 Years to 18 Years
Enrollment
137 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2019
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 6, 2019 · Synced Jun 11, 2026, 12:09 AM EDT
Terminated No phase listed Observational

Incidence of Respiratory Depression in Cesarean Section

NCT01181843
View directory record Official record
Conditions
Respiratory Depression, Postoperative Pain
Interventions
Not listed
Lead sponsor
Wake Forest University
Other
Eligibility
18 Years to 55 Years · Female only
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 7, 2017 · Synced Jun 11, 2026, 12:09 AM EDT
Withdrawn Not applicable Interventional

The Effectiveness of the Jamboxx Respiratory Therapy Device: Study 2

NCT03522480
View directory record Official record
Conditions
Cystic Fibrosis in Children
Interventions
Jamboxx Respiratory Therapy Device, Autogenic Draining Training
Device · Other
Lead sponsor
My Music Machines Inc.
Industry
Eligibility
5 Years to 17 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019
U.S. locations
1
States / cities
Albany, New York
Source: ClinicalTrials.gov public record
Updated Sep 1, 2020 · Synced Jun 11, 2026, 12:09 AM EDT
Completed Not applicable Interventional

Hyperoxia on Ventilation During Recovery From General Anesthesia

NCT05922020
View directory record Official record
Conditions
Ventilatory Depression, Postoperative Respiratory Failure
Interventions
Oxygen gas
Other
Lead sponsor
Stanford University
Other
Eligibility
20 Years to 90 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Mar 12, 2024 · Synced Jun 11, 2026, 12:09 AM EDT
Completed No phase listed Observational Results available

Effect of Opioids on Ventilation in Children With Obstructive Sleep Apnea

NCT03938259
View directory record Official record
Conditions
Respiratory Depression, Obstructive Sleep Apnea
Interventions
Fentanyl
Drug
Lead sponsor
Baylor College of Medicine
Other
Eligibility
2 Years to 8 Years
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 25, 2024 · Synced Jun 11, 2026, 12:09 AM EDT
Recruiting No phase listed Observational

Body Composition Related Evaluation of Airway Tone and Hyper-rEactivity Using Oscillometry

NCT07356310
View directory record Official record
Conditions
Breathing, Lung Function Decreased, Asthma (Diagnosis), Obesity
Interventions
Oscillometer
Device
Lead sponsor
University of Rochester
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Jun 11, 2026, 12:09 AM EDT
Terminated Not applicable Interventional Results available

Reducing Lung Cancer-Related Anxiety (RELAX)

NCT02063828
View directory record Official record
Conditions
Lung Cancer
Interventions
Group A - Device guided breathing low dose, Group B - Device guided breathing high dose, Group C - Usual Breathing Control Group
Device
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
11
States / cities
Rehoboth Beach, Delaware • Wichita, Kansas • Coon Rapids, Minnesota + 7 more
Source: ClinicalTrials.gov public record
Updated Mar 4, 2021 · Synced Jun 11, 2026, 12:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Sequential Exposure to Nitrogen Dioxide and Ozone in Healthy Adult Human Volunteers.

NCT02133586
View directory record Official record
Conditions
Respiratory Depression
Interventions
Ozone, Nitrogen dioxide
Other
Lead sponsor
Environmental Protection Agency (EPA)
Federal
Eligibility
18 Years to 40 Years
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 16, 2020 · Synced Jun 11, 2026, 12:09 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers Results available

Pupillary Unrest as an Indicator of Central Opioid Effect in Subjects 40-60 Years of Age

NCT05391555
View directory record Official record
Conditions
Opioid Toxicity, Pupillary Miosis, Respiratory Depression
Interventions
Remifentanil Hydrochloride, Pupillometry measurement
Drug · Device
Lead sponsor
University of California, San Francisco
Other
Eligibility
40 Years to 60 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated May 1, 2025 · Synced Jun 11, 2026, 12:09 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of a 10 Component Dietary Supplement on Health and the Quality of Life

NCT03052491
View directory record Official record
Conditions
Blood Pressure, HDL Low, Stress, Lung Function Decreased, Quality of Life, Energy Supply; Deficiency, Concentration Ability Impaired, Joint Instability, Immune Deficiency
Interventions
Stem Cell 100+
Dietary Supplement
Lead sponsor
Centagen, Inc.
Industry
Eligibility
35 Years to 80 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Feb 13, 2017 · Synced Jun 11, 2026, 12:09 AM EDT
Completed Not applicable Interventional Results available

PRediction of Opioid-induced Respiratory Depression In Patients Monitored by capnoGraphY

NCT02811302
View directory record Official record
Conditions
Respiratory Depression
Interventions
Capnostream Monitor
Device
Lead sponsor
Medtronic - MITG
Industry
Eligibility
18 Years and older
Enrollment
1,495 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
9
States / cities
Aurora, Colorado • Atlanta, Georgia • Boston, Massachusetts + 5 more
Source: ClinicalTrials.gov public record
Updated Jun 11, 2019 · Synced Jun 11, 2026, 12:09 AM EDT
Completed Phase 2 Interventional Results available

Abnormal Ventilatory Response to Carbon Dioxide: a Potential Biomarker for Seizure Induced Respiratory Depression & Modification by SSRI

NCT02929667
View directory record Official record
Conditions
Epilepsy, SUDEP
Interventions
Fluoxetine, Placebo
Drug
Lead sponsor
Rup Kamal Sainju
Other
Eligibility
18 Years to 75 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
2
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated May 3, 2020 · Synced Jun 11, 2026, 12:09 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Single Dose Crossover Study to Compare the Respiratory Drive After Administration of Belbuca, Oxycodone and Placebo.

NCT03996694
View directory record Official record
Conditions
Respiratory Depression
Interventions
Belbuca 300 µg, Belbuca 600 µg, Belbuca 900 µg, Oxycodone 30 mg, Oxycodone 60 mg, Placebo
Drug
Lead sponsor
BioDelivery Sciences International
Industry
Eligibility
18 Years to 55 Years
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Feb 4, 2021 · Synced Jun 11, 2026, 12:09 AM EDT
Completed No phase listed Observational

Determination of the Clinical Impact of Continuous Surveillance Monitoring (SM) and Utility of IPI.

NCT03050983
View directory record Official record
Conditions
Respiratory Depression, Respiratory Insufficiency
Interventions
IPI
Device
Lead sponsor
Medtronic - MITG
Industry
Eligibility
18 Years and older
Enrollment
440 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Sep 29, 2020 · Synced Jun 11, 2026, 12:09 AM EDT
Completed Not applicable Interventional Results available

Detecting Post-Operative Respiratory Depression in Children

NCT01843933
View directory record Official record
Conditions
Respiratory Depression
Interventions
Capnography
Device
Lead sponsor
Yale University
Other
Eligibility
1 Year to 20 Years
Enrollment
211 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
2
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Feb 23, 2016 · Synced Jun 11, 2026, 12:09 AM EDT
Terminated Not applicable Interventional

The Effectiveness of the Jamboxx Respiratory Therapy Device: Study 3

NCT03547349
View directory record Official record
Conditions
Atelectases, Postoperative Pulmonary
Interventions
Digital Incentive Spirometer, Jamboxx Respiratory Therapy Device
Device
Lead sponsor
My Music Machines Inc.
Industry
Eligibility
18 Years and older
Enrollment
102 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Albany, New York
Source: ClinicalTrials.gov public record
Updated Aug 23, 2022 · Synced Jun 11, 2026, 12:09 AM EDT
Recruiting No phase listed Observational

Advanced Prediction of Respiratory Depression Episode Using the Linshom Continuous Predictive Respiratory Sensor

NCT06744790
View directory record Official record
Conditions
Post Surgical Respiratory Failure, Respiratory Complication
Interventions
Linshom Continuous Predictive Respiratory Monitoring
Device
Lead sponsor
Linshom Medical, Inc.
Industry
Eligibility
18 Years and older
Enrollment
320 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 19, 2024 · Synced Jun 11, 2026, 12:09 AM EDT
Completed Not applicable Interventional Results available

Effects of Reducing Indoor Air Pollution on the Adult Asthmatic Response

NCT02153359
View directory record Official record
Conditions
Asthma
Interventions
High Efficiency Particulate Air Cleaner, Sham air cleaner
Device
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 50 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
2
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 11, 2019 · Synced Jun 11, 2026, 12:09 AM EDT
Completed No phase listed Observational

Clinical Utility of Capnography in the PACU( Post-anaesthesia Care Unit)

NCT02707003
View directory record Official record
Conditions
Respiratory Depression
Interventions
Not listed
Lead sponsor
Medtronic - MITG
Industry
Eligibility
18 Years and older
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Jul 22, 2020 · Synced Jun 11, 2026, 12:09 AM EDT
Completed No phase listed Observational

Vitamin C Supplementation to Pregnant Smokers: Follow-up of 2 Randomized Trials Plus Changes in DNA Methylation

NCT03206710
View directory record Official record
Conditions
Asthma, Wheezing, In Utero Nicotine, Pulmonary Function
Interventions
No current intervention
Other
Lead sponsor
Oregon Health and Science University
Other
Eligibility
6 Months to 11 Years
Enrollment
395 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2024
U.S. locations
2
States / cities
Indianapolis, Indiana • Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Mar 20, 2025 · Synced Jun 11, 2026, 12:09 AM EDT
Completed Not applicable Interventional Results available

Study of the Effect of the Drug Gabapentin on Postoperative Pain and Incidence of Postoperative Nausea and Vomiting

NCT00886236
View directory record Official record
Conditions
Obesity, Morbid, Postoperative Pain, Postoperative Nausea and Vomiting
Interventions
Gabapentin, Placebo
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 80 Years
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Sep 19, 2018 · Synced Jun 11, 2026, 12:09 AM EDT
Completed No phase listed Observational

Respiratory Control and Narcotic Effects

NCT04047550
View directory record Official record
Conditions
Ventilatory Depression, Opioid Intoxication, Opioid Toxicity
Interventions
Ventilatory chemosensitivity
Diagnostic Test
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
10 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 Aug 26, 2020 · Synced Jun 11, 2026, 12:09 AM EDT
Not listed No phase listed Observational

Multimodal Perioperative Pain Management: ComfortSafe Program

NCT04046068
View directory record Official record
Conditions
Post-operative Pain, Post-operative Nausea and Vomiting, Respiratory Depression, Confusion Postoperative
Interventions
ComfortSafe Care
Procedure
Lead sponsor
Georgetown University
Other
Eligibility
21 Years to 75 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Oct 4, 2020 · Synced Jun 11, 2026, 12:09 AM EDT