Brief Title
The Prevalence of Gastro-oesophageal Reflux in Chronic Lung Disease
Official Title
The Prevalence of Gastro-oesophageal Reflux in Chronic Obstructive Pulmonary Disease and Bronchiectasis and the Effects of Medications, Physiotherapy Airway Clearance Techniques and Exercise on Gastro-oesophageal Function.
Brief Summary
Gastric reflux into the oesophagus may further lung damage in respiratory disease. The proportion of adults with chronic lung disease and gastric reflux is unknown. Adults with this disease regularly complete physiotherapy but the contribution of physiotherapy to reflux is unknown. This study will measure gastric reflux in adults with chronic lung disease, using 24 hour acid monitoring. It is anticipated that approximately 50% of adults with chronic lung disease will have gastric reflux. After monitoring, the number of gastric reflux episodes will be calculated. The results will identify the extent of the gastric reflux problem in these patients and will enable appropriate medical treatment and modifications to physiotherapy, which may improve lung function and quality of life.
Detailed Description
Research plan: Fifty-four subjects will be recruited from the Department of AIRMED outpatient clinics at the Alfred Hospital, Melbourne. Subjects will be considered eligible if they have a diagnosis of COPD or bronchiectasis and are clinically stable. Subjects who give their consent will undergo the following measures: 1. Demographic data including age, gender, BMI, prescribed medications at time of study. 2. Structured symptom questionnaire A reliable, valid structured symptom questionnaire which will assess symptomatic GOR. 3. Health -related quality of life and sleep quality Quality of life will be recorded using a Short form-36, St Georges's Respiratory Questionnaire and Quality of Life in Reflux and Dyspepsia questionnaire. 4. Dual-channel 24 hour oesophageal pH monitoring Ambulatory 24 hour oesophageal pH monitoring will be undertaken by all subjects using dual-channel oesophageal pH monitoring equipment. The distal antimony-tipped probe will be sited 5cm above the upper portion of the lower oesophageal sphincter (distal sensor) with the proximal sensor sited 15cm above the distal sensor. The probe is attached to the digitrapper and will record oesophageal pH for 24 hours. The subject will be instructed to activate the digitrapper's three event buttons recording start and finish time of meals, supine versus upright posture and GOR symptoms. The following indices will be measured in the distal and proximal oesophagus: - number of reflux episodes, - % reflux time, - number of long episodes > 5 minutes, - duration of the longest episode - DeMeester score, a weighted overall score of gastro-oesophageal function. All subjects will maintain a 24 hour diary recording meals, positions, medications and physiotherapy airway clearance sessions. During the 24 hour oesophageal pH monitoring, the following interventions will be completed: 1. Standard Spirometry. Measurement of spirometry will be performed according to the GINA guidelines. 2. Pepsin Assay. Four sets of samples per subject of sputum and saliva for pepsin analysis will be collected during the study: at study commencement, during the airway clearance session, upon rising in the morning and post exercise testing. EnzChek Protease Assay kit will be used for analysis. 3. Airway clearance techniques. Each subject with excessive secretions will perform PEP therapy, completing 8 cycles of 10 breaths, 2 forced expirations (huffs) and coughing using a PariPEP device. 4. Exercise testing. Each subject will complete 2 x Six-Minute-Walk Tests and 3 x Grocery Shelving Tests according to the test protocols. 5. Actigraphy. Each subject will wear a wrist actigraph on their dominant wrist which will record timing of activity and inactivity, so that sleep quality can be extrapolated. Subjects will also complete a Pittsburgh Sleep Diary during the study. On study completion, subjects will return for removal of the oesophageal probe and retrieval of the digitrapper. Oesophageal pH study data will be downloaded onto a computer file for analysis. Oral intake, medications, symptoms, positioning, airway clearance and exercise will be extracted from subjective diaries that the subjects maintain, together with quality of life questionnaires and compared with pH recording data. Saliva and sputum pepsin assay results will be correlated with oesophageal pH monitoring data.
Study Type
Observational
Primary Outcome
Prevalence of GOR
Condition
Chronic Obstructive Pulmonary Disease
Publications
* Includes publications given by the data provider as well as publications identified by National Clinical Trials Identifier (NCT ID) in Medline.
Recruitment Information
Estimated Enrollment
75
Start Date
July 2005
Completion Date
June 2009
Primary Completion Date
June 2009
Eligibility Criteria
Inclusion Criteria: - Diagnosis of Chronic obstructive pulmonary disease according to GOLD classification - Diagnosis of Bronchiectasis - Medically stable, without hospital admission in month prior to study Exclusion Criteria: - diagnosis of asthma, cystic fibrosis, interstitial lung disease - known hiatus hernia, oesophageal varices, obstructive sleep apnoea - medically unstable for exercise
Gender
All
Ages
20 Years - 80 Years
Accepts Healthy Volunteers
Accepts Healthy Volunteers
Contacts
Annemarie L Lee, BPhys, MPhys, ,
Location Countries
Australia
Location Countries
Australia
Administrative Informations
NCT ID
NCT00697177
Organization ID
106/05
Secondary IDs
CTG008/05
Responsible Party
Sponsor
Study Sponsor
Bayside Health
Collaborators
University of Melbourne
Study Sponsor
Annemarie L Lee, BPhys, MPhys, Principal Investigator, University of Melbourne
Verification Date
September 2005