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Showing 1–24 of 30 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: pH monitoring Clear all
Completed Not applicable Interventional Accepts healthy volunteers Results available

Clinical Evidence of pH Dependent ß2 Adrenergic Transport Mechanisms in the Airway

NCT01216748
View directory record Official record
Conditions
Healthy Volunteers
Interventions
quiet breathing, Hypocapnic Hyperventilation, Hypercapnic Hyperventilation, eucapnic hyperventilation
Other
Lead sponsor
University of Miami
Other
Eligibility
18 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated May 26, 2016 · Synced Sep 8, 2026, 7:48 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Study of Erythromycin in GER-Associated Apnea of the Newborn

NCT01825473
View directory record Official record
Conditions
Gastroesophageal Reflux, Apnea, Bradycardia
Interventions
Erythromycin, Multi-channel intra-luminal impedance (MII) pH monitoring, Placebo (D5W)
Drug · Device
Lead sponsor
University of Virginia
Other
Eligibility
14 Days and older
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Apr 4, 2013 · Synced Sep 8, 2026, 7:48 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Understanding the Pathophysiology and Effects of Diaphragmatic Breathing in Upright Gastroesophageal Reflux

NCT02972047
View directory record Official record
Conditions
GERD
Interventions
Diaphragmatic Breathing, Sham Comparator
Behavioral
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2020
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Dec 3, 2020 · Synced Sep 8, 2026, 7:48 PM EDT
Completed Not applicable Interventional Results available

Feasibility of Placing Bravo PH Capsule in Proximal Esophagus

NCT00378898
View directory record Official record
Conditions
Gastroesophageal Reflux Disease
Interventions
BRAVO capsule, Fluoroscopy, sham BRAVO capsule placement
Device · Procedure · Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 3, 2017 · Synced Sep 8, 2026, 7:48 PM EDT
Not yet recruiting Not applicable Interventional

PROPER-GERD: A Prospective Crossover Study to Evaluate Probe Placement Optimization for Reflux Testing in Women and Lower-BMI Patients

NCT07716592
View directory record Official record
Conditions
GERD
Interventions
Bravo pH monitoring sessions
Device
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 90 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 20, 2026 · Synced Sep 8, 2026, 7:48 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Transit Time and Bacterial Overgrowth Using SmartPill Capsule

NCT00577772
View directory record Official record
Conditions
Small Bowel Bacterial Overgrowth, Gastrointestinal Diseases, Stomach Diseases, Digestive System Diseases
Interventions
Xifaxan, SmartPill, Lactulose hydrogen breath test (H_2BT)
Drug · Device · Procedure
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 70 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2010
U.S. locations
1
States / cities
Scottsdale, Arizona
Source: ClinicalTrials.gov public record
Updated Oct 4, 2012 · Synced Sep 8, 2026, 7:48 PM 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 8, 2026, 7:48 PM EDT
Completed Not applicable Interventional

Prematurity Related Ventilatory Control (PRE-VENT) - Specific Aim 2

NCT03333161
View directory record Official record
Conditions
Infant,Premature
Interventions
Cardiorespiratory monitoring
Diagnostic Test
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
1 Day to 15 Days
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Sep 20, 2021 · Synced Sep 8, 2026, 7:48 PM EDT
Completed No phase listed Observational

Biology in Patients With Reflux Esophagitis

NCT01194323
View directory record Official record
Conditions
GERD
Interventions
Not listed
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 3, 2017 · Synced Sep 8, 2026, 7:48 PM EDT
Terminated Not applicable Interventional Results available

Assessment of Zegerid on Esophageal pH in Patients With Barrett's Esophagus

NCT01129778
View directory record Official record
Conditions
Barrett Esophagus, Gastroesophageal Reflux
Interventions
Zegerid (proton pump inhibitor), Bravo pH monitoring
Drug · Procedure
Lead sponsor
Stanford University
Other
Eligibility
Not listed
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Jun 5, 2017 · Synced Sep 8, 2026, 7:48 PM EDT
Not listed No phase listed Observational

Serial Exhaled Breath pH Monitoring

NCT00330603
View directory record Official record
Conditions
Gastroesophageal Reflux
Interventions
Serial exhaled breath collections
Procedure
Lead sponsor
University of Virginia
Other
Eligibility
5 Years and older
Enrollment
99 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2011
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 7, 2011 · Synced Sep 8, 2026, 7:48 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

The Effect of High PCO2 Solution on Esophageal Acid Sensation

NCT01128608
View directory record Official record
Conditions
Gastroesophageal Reflux Disease
Interventions
24-Hr Esohpageal pH Monitoring, PCO2 Acid Perfusion and 0.1N HCI Perfusion
Procedure
Lead sponsor
Southern Arizona VA Health Care System
Federal
Eligibility
18 Years to 80 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
2
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Jul 20, 2010 · Synced Sep 8, 2026, 7:48 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Cough Monitoring Study

NCT01263626
View directory record Official record
Conditions
Cough, Reflux
Interventions
Not listed
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years and older
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jun 7, 2015 · Synced Sep 8, 2026, 7:48 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Can We Predict Who Has Gastroesophageal Reflux Disease (GERD)?

NCT01204931
View directory record Official record
Conditions
Gastroesophageal Reflux Disease
Interventions
Not listed
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years and older
Enrollment
254 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2015
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 19, 2016 · Synced Sep 8, 2026, 7:48 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Physical Activity Smartphone App for African American Men (FitBros) Ph II

NCT05621044
View directory record Official record
Conditions
Exercise, Health Behavior, Technology
Interventions
FitBrothers smartphone active app, Nike Training Club
Behavioral
Lead sponsor
Klein Buendel, Inc.
Industry
Eligibility
30 Years and older · Male only
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
3
States / cities
Golden, Colorado • Washington D.C., District of Columbia • Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Feb 2, 2026 · Synced Sep 8, 2026, 7:48 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Location-based Smartphone Technology to Guide College Students Healthy Choices Ph II

NCT02996864
View directory record Official record
Conditions
Overweight and Obesity, Health Behavior, Sleep Deprivation
Interventions
Healthy Detours App, Fat Secret App
Other
Lead sponsor
Klein Buendel, Inc.
Industry
Eligibility
18 Years to 29 Years
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2018
U.S. locations
2
States / cities
Golden, Colorado • Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Feb 5, 2023 · Synced Sep 8, 2026, 7:48 PM EDT
Completed Phase 1Phase 2 Interventional

Feasibility of Mid-frequency Ventilation in Newborns With RDS: Randomized Crossover Pilot Trial

NCT01242462
View directory record Official record
Conditions
Respiratory Distress Syndrome, Newborn
Interventions
Conventional Pressure Controlled SIMV, Mid-frequency Ventilation
Procedure · Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
1 Hour to 7 Days
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jun 1, 2014 · Synced Sep 8, 2026, 7:48 PM EDT
No Longer Available No phase listed Expanded access

Riociguat in Patients With Chronic Thromboembolic Pulmonary Hypertension (CTEPH)

NCT01784562
View directory record Official record
Conditions
Hypertension, Pulmonary
Interventions
Adempas (Riociguat, BAY63-2521)
Drug
Lead sponsor
Bayer
Industry
Eligibility
18 Years to 80 Years
U.S. locations
24
States / cities
Tucson, Arizona • La Jolla, California • Los Angeles, California + 20 more
Source: ClinicalTrials.gov public record
Updated Jan 5, 2016 · Synced Sep 8, 2026, 7:48 PM EDT
Completed No phase listed Observational

Pre-Hospital Wireless Transmission of Electrocardiograms to a Cardiologist Via a Hand-Held Device

NCT00682526
View directory record Official record
Conditions
Myocardial Infarction
Interventions
SmartLink Wireless Monitoring System (K033642)
Device
Lead sponsor
Welch Allyn
Industry
Eligibility
18 Years and older
Enrollment
527 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2010
U.S. locations
7
States / cities
Salinas, California • Gainesville, Florida • Miami, Florida + 3 more
Source: ClinicalTrials.gov public record
Updated Feb 22, 2012 · Synced Sep 8, 2026, 7:48 PM EDT
Terminated Not applicable Interventional

Continuous Supraglottic pH Monitoring in Prolonged Intubated Intensive Care Patients and High Risk Aspiration Intraoperative Patients

NCT02604043
View directory record Official record
Conditions
Aspiration, Respiratory
Interventions
pH monitoring, accelerometer monitoring
Other
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 3, 2019 · Synced Sep 8, 2026, 7:48 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Assessing Normal Multichannel Intraluminal Impedance (MII)-pH Parameters for Today's Population

NCT01566383
View directory record Official record
Conditions
Identify Normal MII-pH Parameters
Interventions
24-hr pH monitoring
Procedure
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
33 Years to 65 Years
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
2
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Feb 22, 2017 · Synced Sep 8, 2026, 7:48 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Efficacy of Dx-pH Probe in Diagnosing Extra-esophageal Reflux Disease

NCT00388453
View directory record Official record
Conditions
GERD, Larynx Disease
Interventions
Dx-pH Probe, Manometry
Device · Procedure
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
47 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2013
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jun 26, 2017 · Synced Sep 8, 2026, 7:48 PM EDT
Not yet recruiting Not applicable Interventional

Feasibility Study of a Continuous Glucose-Ketone Monitoring Device in People With Type 1 Diabetes

NCT06977633
View directory record Official record
Conditions
Type 1 Diabetes (T1D)
Interventions
Temporary Insulin Suspension, Glucose and ketone sensor
Behavioral · Device
Lead sponsor
Mahla Poudineh
Other
Eligibility
18 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Sep 8, 2026, 7:48 PM EDT
Completed Phase 2 Interventional

Use of NERv's Inline Device as an Early Diagnostic Method for Postoperative Complications

NCT04582708
View directory record Official record
Conditions
Anastomotic Leak, Fistula, Postoperative Leak, Postoperative Pancreatic Fistula, POPF
Interventions
NERv's Inline Device
Device
Lead sponsor
FluidAI Medical
Industry
Eligibility
18 Years and older
Enrollment
316 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 9, 2025 · Synced Sep 8, 2026, 7:48 PM EDT