A Validation Study of the Dx-pH Probe in Children for the Detection of Extra-oesophageal Reflux (NCT02457429) | Clinical Trial Compass
CompletedNot Applicable
A Validation Study of the Dx-pH Probe in Children for the Detection of Extra-oesophageal Reflux
United Kingdom16 participantsStarted 2013-03-22
Plain-language summary
Gastro-oesophageal reflux (GORD) and its extraoesophageal manifestations present with a variety of symptoms in both adult and paediatric populations. In children the effects of refluxate above the upper oesophageal sphincter (UES) has been implicated as a contributory factor in the underlying pathological processes of a number of conditions including apnoea, asthma, chronic cough, subglottic stenosis, chronic rhinosinusitis and otitis media. The absence of typical symptoms in addition to the inability to obtain a formal symptom history from a young paediatric population contributes to the difficulty in establishing a diagnosis. At present there are no studies or data directly measuring extraoesophageal reflux and its correlation to oesophageal pH monitoring in children.
The use of twenty-four hour oesophageal pH monitoring is regarded as the established technique for diagnosis of GORD, however this technique has been less reliable for detecting extra-oesophageal reflux. The investigators intend to use the Dx-pH Measurement system, a sensitive and minimally invasive transnasal device, to assess the feasibility and validate its use in a paediatric population.
Who can participate
Age range
1 Year – 16 Years
Sex
ALL
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* All children between the age of 1 year old and 16 years old consecutively referred for outpatient 24 hour oesophageal pH / impedance monitoring will be invited to participate in the study. This is regardless of the underlying diagnosis, aetiology and manifestation of symptoms.
Exclusion Criteria:
* Children under the age of 1 year old. Children under 1 year old will be excluded due to the technical difficulty of placing both the pH / impedance monitoring probe and the Dx-pH probe into the same nostril. Firstly, this is due to the size restriction of placing 2 probes into one nostril. Secondly, the non-pathologic high incidence of regurgitation and positing in below the age of 1 will make data difficult to interpret.
* Children with an nasogastric feeding tube in situ will be excluded. Firstly due to the difficulty in placing and securing the nasogastric, oesophageal pH and Dx-pH probe (3 tubes / probes) through the nostrils, with resultant bilateral nasal obstruction. Secondly, the nasogastric tube causes increased iatrogenic reflux within the pharynx, making data more difficult to interpret and creating artificial reflux events.
* Children with cleft palate prior to surgical repair will be excluded as the Dx-pH probe will be difficult to locate in the oropharynx and may displace into the oral cavity.
* Children requiring pH monitoring as inpatients during an acute medical admission. Children will be excluded from the study if their condition has nece…
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.