Serial Exhaled Breath pH Monitoring

Status Recruiting

Clinical Trial Summary

This study will seek to determine the amount of acids a person with a chronic cough that is suspected to be related to acid reflux breathes out after coughing. The study will also seek to determine if this measurement can predict the best treatment for the cough.

Subjects with a chronic cough which is suspected to be related to acid reflux for which their doctor has prescribed a proton pump inhibitor medication will be enrolled in this study.

Clinical Trial Description

Acid reflux has been considered to be a key contributor to cough, particularly in patients with obstructive lung diseases. However, diagnosis has relied upon either responsiveness to high dose twice daily administration of proton pump inhibitor therapy or by 24 hour esophageal pH probes. This study is designed to provide information for the development of a clinically useful diagnostic (exhaled breath condensate pH) to identify the contribution of acid reflux to cough.

Exhaled breath condensate (EBC) pH has been well documented to reflect airway acidification. Acid reflux to the level of the hypopharynx, which is a key common trigger of acid reflux induced cough, acidifies the airway sufficiently to be identified with EBC pH assays. The association of low EBC pH with an immediately preceding cough strongly suggests an association of the cough with an airway acid event, and even if the acidity is not prolonged, acid reflux becomes highly suspect.

This study will examine the ability of EBC pH measurements to prognose the likelihood of a positive response to acid blockade with proton pump inhibitor therapy in subjects with chronic cough. ;

Study Design

Observational Model: Cohort, Time Perspective: Prospective

Related Conditions & MeSH terms

Gastroesophageal Reflux

Clinical Trial Details

NCT number	NCT00330603
Study type	Observational
Source	University of Virginia
Contact	John Hunt, MD
Phone	434-243-9324
Email	jfh2m@virginia.edu
Status	Recruiting
Phase	N/A
Start date	April 2006
Completion date	December 2011

View Details

See also
Status	Clinical Trial	Phase
Recruiting	`NCT05561179` - Hyaluronic Acid in Patients With Gastroesophageal Reflux Disease	N/A
Withdrawn	`NCT02213887` - Study of the Effects of Pantoprazole on Levels of Prescribed Psychiatric Medications	Phase 4
Completed	`NCT01946971` - Lansoprazole in Preterm Infants With Gastroesophageal Reflux (GER)	Phase 1/Phase 2
Recruiting	`NCT01825473` - Study of Erythromycin in GER-Associated Apnea of the Newborn	N/A
Completed	`NCT00614536` - Study of Changes in Reflux Symptoms and Reflux Finding Score According to Rabeprazole Treatment Period	Phase 4
Completed	`NCT00365300` - Study Evaluating the Efficacy and Safety of Pantoprazole in Infants With Symptomatic Gastroesophageal Reflux Disease (GERD)	Phase 3
Completed	`NCT00284908` - Dose-Effect of S-Tenatoprazole-Na(STU-Na) 30 mg, 60 mg, 90 mg and 120 mg in Healthy Volunteers	Phase 1
Completed	`NCT00373997` - Esophageal and Laryngeal Tissue Changes in Patients Suspected of Having Laryngopharyngeal Reflux	Phase 4
Completed	`NCT00215787` - Investigation of the Association Between Nasal Polyposis and Extraesophageal Reflux Disease	N/A
Completed	`NCT00141960` - Famotidine in Subjects With Non-erosive Gastroesophageal Reflux Disease	Phase 2/Phase 3
Completed	`NCT01167543` - Relationship and Pathophysiology of Gastroesophageal Reflux and Dental/Periodontal Disease	N/A
Completed	`NCT00291746` - Validation of RDQ Questionnaire	Phase 4
Completed	`NCT00226044` - Rectal and Oral Omeprazole Treatment of Reflux Disease in Infants.	Phase 3
Completed	`NCT00567021` - German PMS Trial (AWB) to Evaluate Therapy in Reflux Disease and NSAR-Symptoms	N/A
Completed	`NCT01048840` - Natural History of Gastroesophageal Reflux (GER) in Children < 12 Years of Age
Completed	`NCT00181805` - Natural History of Gastroesophageal Reflux (GER) in Children and Adolescents
Terminated	`NCT01281553` - A Study of Cisapride in Patients With Symptomatic Gastro-Oesophageal Reflux Disease	Phase 4
Completed	`NCT05486169` - Gastroesophageal Reflux Disease After Laparoscopic Sleeve Gastrectomy	N/A
Completed	`NCT04034017` - Gastroesophageal Reflux Disease Among College Students
Terminated	`NCT03226054` - Determining Risk Factors for Successful PPI Weaning	N/A