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Showing 1–24 of 121 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Nitrous oxide Clear all
Active, not recruiting Not applicable Interventional

Multi-center Clinical Study to Evaluate the C2 CryoBalloon Focal Ablation System

NCT02514525
View directory record Official record
Conditions
Barrett Esophagus
Interventions
CryoBalloon Ablation System
Device
Lead sponsor
Pentax Medical
Industry
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2025
U.S. locations
11
States / cities
Orange, California • Sarasota, Florida • Chicago, Illinois + 8 more
Source: ClinicalTrials.gov public record
Updated Jan 12, 2025 · Synced Sep 2, 2026, 5:26 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Comparison of Two Intravenous Drug Combinations for Ambulatory Oral & Maxillofacial Surgery

NCT06867068
View directory record Official record
Conditions
Anesthesia, Tooth Extraction
Interventions
Midazolam Hydrochloride, Fentanyl, Ketamine, Propofol injection, Nitrous oxide
Drug
Lead sponsor
Albert Einstein College of Medicine
Other
Eligibility
16 Years and older
Enrollment
73 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2024
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Mar 26, 2026 · Synced Sep 2, 2026, 5:26 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Combined Alcohol and Nitrous Oxide Intake - 15

NCT00000263
View directory record Official record
Conditions
Opioid-Related Disorders, Substance-Related Disorders
Interventions
30% Nitrous oxide, 0.25 g/Kg ethanol, 0.5 g/KG ethanol, 0 g/Kg ethanol
Drug · Other
Lead sponsor
University of Chicago
Other
Eligibility
Not listed
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1997 – 1998
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 26, 2015 · Synced Sep 2, 2026, 5:26 PM EDT
Withdrawn Phase 3 Interventional Accepts healthy volunteers

Nitrite Infusion in High Risk Patients Undergoing Cardiopulmonary Bypass

NCT03331146
View directory record Official record
Conditions
Acute Kidney Injury
Interventions
Saline, Sodium Nitrite
Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
19 Years to 100 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Sep 26, 2018 · Synced Sep 2, 2026, 5:26 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Nitrous Oxide for Pain Management of First Trimester Surgical Abortion

NCT02096575
View directory record Official record
Conditions
Abortion in First Trimester
Interventions
Nitrous oxide administration
Other
Lead sponsor
University of New Mexico
Other
Eligibility
18 Years and older · Female only
Enrollment
140 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2015
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Apr 18, 2016 · Synced Sep 2, 2026, 5:26 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Peripheral Nerve Blocks in Pediatric Orthopedic Patients

NCT02236130
View directory record Official record
Conditions
Pediatric Extremity Fracture, Pediatric Extremity Soft Tissue Injury
Interventions
Regional block, General Anesthesia, Local Anesthetic Ropivacaine, Opioids Morphine, Oral pain medication Acetaminophen with Hydrocodone
Procedure · Drug
Lead sponsor
University of Mississippi Medical Center
Other
Eligibility
6 Years to 17 Years
Enrollment
49 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Jackson, Mississippi
Source: ClinicalTrials.gov public record
Updated Feb 12, 2017 · Synced Sep 2, 2026, 5:26 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Nitrous Oxide: A Dose-Response Analysis - 5

NCT00000253
View directory record Official record
Conditions
Opioid-Related Disorders, Substance-Related Disorders
Interventions
10% N2O, 20% N2O, 30% N2O, 40% N2O
Drug
Lead sponsor
University of Chicago
Other
Eligibility
21 Years to 37 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1994 – 1996
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 27, 2015 · Synced Sep 2, 2026, 5:26 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Nitrous Oxide for Pain Management of Intrauterine Device (IUD) Insertion

NCT02391714
View directory record Official record
Conditions
Contraception
Interventions
IUD insertion, Povidone-Iodine, Chlorhexidine, Oxygen, Nitrous oxide
Procedure · Drug · Other
Lead sponsor
University of New Mexico
Other
Eligibility
12 Years and older · Female only
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Feb 2, 2016 · Synced Sep 2, 2026, 5:26 PM EDT
Completed Not applicable Interventional Results available

Evaluation of Effect of CryoBalloon Focal Ablation System on Human Esophageal Epithelium

NCT02534233
View directory record Official record
Conditions
Barrett's Esophagus, Esophageal Squamous Dysplasia, Esophageal Cancer
Interventions
CryoBalloon
Device
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
58 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2025
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 31, 2025 · Synced Sep 2, 2026, 5:26 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Nitrous Oxide Versus Intravenous Sedation for Anesthesia

NCT02755090
View directory record Official record
Conditions
Pregnancy Termination in Second Trimester
Interventions
Nitrous Oxide, IV Saline
Drug
Lead sponsor
University of New Mexico
Other
Eligibility
18 Years and older · Female only
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
2
States / cities
Denver, Colorado • Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Sep 14, 2017 · Synced Sep 2, 2026, 5:26 PM EDT
Recruiting Phase 2 Interventional

Efficacy of Nitrous Oxide in OCD: Pilot Study

NCT03826693
View directory record Official record
Conditions
Obsessive-Compulsive Disorder
Interventions
Nitrous Oxide, Nitrogen
Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 65 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Aug 26, 2025 · Synced Sep 2, 2026, 5:26 PM EDT
Terminated Phase 1Phase 2 Interventional Results available

Safety and Efficacy of Sodium Nitrite in Sickle Cell Disease

NCT01033227
View directory record Official record
Conditions
Sickle Cell Disease
Interventions
sodium nitrite injection, usp
Drug
Lead sponsor
Children's Hospital Los Angeles
Other
Eligibility
8 Years to 23 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Oct 16, 2017 · Synced Sep 2, 2026, 5:26 PM EDT
Active, not recruiting Not applicable Interventional

Cryoneurolysis for Painful Diabetic Neuropathy of the Foot

NCT06646731
View directory record Official record
Conditions
Painful Diabetic Peripheral Neuropathy (PDPN)
Interventions
cryoneurolysis, sham cryoneurolysis
Device
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Jul 5, 2026 · Synced Sep 2, 2026, 5:26 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Nitrous Oxide Neuroimaging

NCT06702631
View directory record Official record
Conditions
Anesthesia, Pain, Amnesia
Interventions
Nitrous oxide, Peripheral Nerve Stimulation
Drug · Device
Lead sponsor
Keith M Vogt
Other
Eligibility
18 Years to 59 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 18, 2026 · Synced Sep 2, 2026, 5:26 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effect of Nitrous Oxide (N2O) on Intraocular Pressure in Healthy Volunteers

NCT00967694
View directory record Official record
Conditions
Glaucoma, Sedation
Interventions
Nitrous oxide
Drug
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years to 40 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Sep 22, 2014 · Synced Sep 2, 2026, 5:26 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Isoflurane at Subanesthetic Concentrations - 6

NCT00000254
View directory record Official record
Conditions
Opioid-Related Disorders, Substance-Related Disorders
Interventions
40% Nitrous oxide, Sham comparator, 0.2% isoflurane, 0.4% isoflurane, 0.6% isoflurane
Drug · Other
Lead sponsor
University of Chicago
Other
Eligibility
21 Years to 34 Years · Male only
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1995
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 27, 2015 · Synced Sep 2, 2026, 5:26 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Effects of Nitrite on Blood Vessel Dilation in Normal Volunteers

NCT00048477
View directory record Official record
Conditions
Nitric Oxide, Endothelium-Derived Relaxing Factor, Healthy
Interventions
L-NMMA and Sodium Nitrite
Drug
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
Not listed
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2003
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 2, 2026, 5:26 PM EDT
Completed Phase 2 Interventional

Nitric Oxide Inhalation Therapy to Relieve Chest Pain in Patients With Coronary Artery Disease

NCT00014040
View directory record Official record
Conditions
Coronary Disease, Myocardial Ischemia
Interventions
Nitric Oxide and INOpulse Delivery System
Drug
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
Not listed
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2003
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 2, 2026, 5:26 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Mask Study: One-handed vs. Two Handed Technique in Children

NCT03215121
View directory record Official record
Conditions
Obstructive Sleep Apnea
Interventions
One handed mask airway, switch to two hands, Two handed mask airway + jaw thrust, Two handed mask airway, switch to one hand
Procedure
Lead sponsor
Nemours Children's Clinic
Other
Eligibility
1 Year to 8 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Wilmington, Delaware
Source: ClinicalTrials.gov public record
Updated Jan 22, 2020 · Synced Sep 2, 2026, 5:26 PM EDT
Recruiting Phase 1 Interventional

Inhaled Nitric Oxide in Acute Ischemic Stroke Patients Undergoing Mechanical Thrombectomy

NCT05871606
View directory record Official record
Conditions
Cerebrovascular Disorders, Acute Cerebrovascular Disease
Interventions
iNO
Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years to 80 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
2
States / cities
Charlotte, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 22, 2026 · Synced Sep 2, 2026, 5:26 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

The Measurement of Intraocular Pressure in Normal Children Under General Anesthesia With and Without Nitrous Oxide and Anesthetic Eye Drops

NCT01925391
View directory record Official record
Conditions
Glaucoma, Intraocular Pressure, Anesthesia
Interventions
Tono-pen XL Applanation tonometer + Ocu-film +
Drug
Lead sponsor
University of Miami
Other
Eligibility
1 Year to 18 Years
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
2
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jun 15, 2014 · Synced Sep 2, 2026, 5:26 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

A Comparison of Inhalation vs. Intravenous Induction

NCT02331108
View directory record Official record
Conditions
Hypothermia
Interventions
Selection of anesthetic induction technique
Drug
Lead sponsor
Albert Einstein Healthcare Network
Other
Eligibility
18 Years and older
Enrollment
331 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 16, 2017 · Synced Sep 2, 2026, 5:26 PM EDT
Active, not recruiting Not applicable Interventional

Cryoneurolysis Versus Radiofrequency Ablation for the Treatment of Chronic Low Back Pain

NCT06804551
View directory record Official record
Conditions
Chronic Low-back Pain
Interventions
iovera system, Radiofrequency ablation alone
Device
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Aug 12, 2026 · Synced Sep 2, 2026, 5:26 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Virtual Reality Compared to Nitrous Oxide for Labor Analgesia

NCT04749043
View directory record Official record
Conditions
Labor Pain
Interventions
Oculus Quest 2 Virtual Reality Device, Nitrous oxide
Device · Drug
Lead sponsor
Brendan Carvalho
Other
Eligibility
18 Years and older · Female only
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Mar 17, 2024 · Synced Sep 2, 2026, 5:26 PM EDT