Observational Field Study of Acute Esophageal Food Bolus Impaction by Mean Esophageal Manometry and 24h-pH-monitoring
NCT ID: NCT01447823
Last Updated: 2011-10-12
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
Get a concise snapshot of the trial, including recruitment status, study phase, enrollment targets, and key timeline milestones.
UNKNOWN
40 participants
OBSERVATIONAL
2011-08-31
2013-12-31
Brief Summary
Review the sponsor-provided synopsis that highlights what the study is about and why it is being conducted.
The collection of these examination results is the aim of this prospective unrandomised observational field study to assess weather the currently applied procedures are valid to diagnose the cause of impaction to find optimal therapy for each patient.
Detailed Description
Dive into the extended narrative that explains the scientific background, objectives, and procedures in greater depth.
Motility disorders of the esophagus lead to an impaired bolus transport and/or reflux of stomach content to the esophagus, and may cause symptoms such as (obstructive) dysphagia, chest pain, heart burn and/or regurgitation.
Acute esophageal food impaction is a common acute condition of the upper GI tract that usually needs immediate medical attention. The food bolus, e.g. a peace of red meat or similar is blocked within the tubular part of the esophagus, e.g. proximal to the esophagogastric junction and neither passes spontaneously into the stomach nor can be regurgitated actively. In this case it usually requires upper endoscopy for endoscopic removal of the food bolus.
Possible causes of food impaction are (i) structural obstruction within the esophagus such as a Schatzki's ring, an esophageal web, a peptic stenosis secondary to gastroesophageal reflux disease, or more rarely esophageal carcinoma \[1, 2\]; (ii) functional causes of obstruction are mainly Achalasia or Esophageal Esophagitis (EE). In Achalasia a idiopathic neurodegenerative destruction of the inhibitory neurons of the esophagus leads to a failure of the lower esophageal sphincter to relax and an impaired esophageal peristalsis. Patients usually present with a history of progressive dysphagia and regurgitation of undigested food, but rarely a food impaction can occur \[3\]. Eosinophilic Esophagitis is a idiopathic disorder in which eosinophilic infiltration of the mucosal wall leads to an impaired esophageal motility, which usually causes dysphagia, retrosternal pain or food bolus impaction.\[3\] Its etiology remains unknown but several studies suggest an allergic response to food and allergens. Previously believed to be a rather rare disease and therefore rare cause for bolus impaction, eosinophilic esophagitis has emerged as one of the most common causes for food impaction and dysphagia in general \[4\]. The increase in prevalence is not entirely clear; besides better recognition by gastroenterologists and pathologists there seems to be a true increase in incidence, probably due to an increased incidence of allergic diseases \[5\]. Its diagnosis is difficult due to other causes of eosinophilic infiltrate such as gastroesophageal reflux disease or eosinophilic gastroenteritis\[3\].
The reason for an impaired motility in EE is unknown, although several hypothetic mechanisms are discussed \[6\]: (i) increased contraction of fibroblast secondary to presence of eosinophilic granulocytes, (ii) axonal necrosis secondary to eosinophilic degradation (iii) binding of eosinophil derived MBP (major basic protein) to muscarinic acetylcholine receptors leading to increased contraction.
The true prevalence of eosinophilic esophagitis in patients with food impaction remains unknown. Desai et al evaluated 31 patients with acute bolus impaction of which more than 50% had an increased count of intraesophageal eosinophils per high power field \[4\]. However, the true share of EE remains unclear. Especially the amount of patients with eosinophilic infiltrate due to gastroesophageal reflux is not defined (half of all patients had PPI before endoscopy).
The current clinical standard of care for patients with food bolus impaction at the Division of Gastroenterology at the University Hospital Zurich includes
1. endoscopy to i) remove the food bolus; ii) take esophageal, gastric and duodenal biopsies to assess histological abnormalities and iii) assess structural causes for obstruction;
2. a high resolution esophageal manometry (HRM) to assess esophageal motility;
3. an ambulatory intraesophageal pH-monitoring to asses esophageal acid exposure and
4. venous blood sampling to assess eosinophilic count in peripheral blood.
These procedures are considered to be both i) necessary as well as ii) sufficient and accurate to elucidate the true cause of bolus impaction \[3\]. Our aim is now to objectify this standard procedure of care in an open, prospective, observational, unrandomized field study. It is important to mention that all procedures have been and are indicated in this situation as current standard procedure of care to assess patients with bolus impaction; they should be performed whether the patient is included in our field study or not. Therefore participation in the study does not lead to any additional diagnostic or therapeutic procedures/interventions
Conditions
See the medical conditions and disease areas that this research is targeting or investigating.
Study Design
Understand how the trial is structured, including allocation methods, masking strategies, primary purpose, and other design elements.
COHORT
PROSPECTIVE
Eligibility Criteria
Check the participation requirements, including inclusion and exclusion rules, age limits, and whether healthy volunteers are accepted.
Inclusion Criteria
* Age \> 18 years
* Informed consent
Exclusion Criteria
* Inability to understand the informed consent form
18 Years
90 Years
ALL
No
Sponsors
Meet the organizations funding or collaborating on the study and learn about their roles.
University of Zurich
OTHER
Responsible Party
Identify the individual or organization who holds primary responsibility for the study information submitted to regulators.
Principal Investigators
Learn about the lead researchers overseeing the trial and their institutional affiliations.
01 Studienregister MasterAdmins
Role: STUDY_DIRECTOR
UniversitaetsSpital Zuerich
Michael Fried, Professor, MD
Role: PRINCIPAL_INVESTIGATOR
University Hospital Zurich, Division of Gastroenterology and Hepatology
Locations
Explore where the study is taking place and check the recruitment status at each participating site.
University Hospital Zurich, Gastroenterology and Hepatology
Zurich, , Switzerland
Countries
Review the countries where the study has at least one active or historical site.
Central Contacts
Reach out to these primary contacts for questions about participation or study logistics.
Other Identifiers
Review additional registry numbers or institutional identifiers associated with this trial.
KEK-ZH Nr 2011-0192
Identifier Type: -
Identifier Source: org_study_id