- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04730076
Balloon Dilation Methods for Benign Esophageal Stricture
Randomized Prospective Trial of Balloon Dilation Technique for Benign Esophageal Strictures.
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Benign esophageal strictures are a frequently encountered problem in the clinical practice of gastroenterology. The formation of benign strictures of the esophagus is believed to be caused by the production of fibrous tissue and deposition of collagen stimulated by deep esophageal ulceration or chronic inflammation. The most common cause of esophageal stricture is a peptic stricture, which is caused by reflux esophagitis. Gastroesophageal reflux disease (GERD) affects approximately 40% of adults and if left untreated 7-25% will develop a peptic stricture. Other common causes include radiation, caustic ingestions, anastomotic strictures, and eosinophilic esophagitis-associated strictures. Patients with an esophageal stricture characteristically have dysphagia (difficulty swallowing) to solid food instead of liquids. Other symptoms could include regurgitation of food and liquids, sensation that food is stuck in the chest after eating, and heartburn. Dysphagia can have a severe and deleterious impact on quality of life of these patients and lead to complications such as aspiration, weight loss and malnutrition.
According to the literature, esophageal strictures are structurally categorized into two groups: simple and complex. Simple strictures are concentric with a diameter of >12 mm or easily allow passage of a diagnostic upper endoscope. Complex strictures are usually long, asymmetric, diameter <12 mm or inability to pass an endoscope. Complex strictures are more difficult to treat and tend to be refractory despite adequate dilation therapy.
The standard management approach of benign strictures is dilation therapy. The mechanistic action of the balloon dilators is they distribute the dilating force radially and simultaneously across the entire length of the stricture. Balloon dilators can be passed through-the-scope (TTS) or over a guide-wire. Once the balloon dilator catheter is passed through the endoscope, it is positioned so that the narrowest portion of the stricture is at the center of the balloon. The dilators are typically inflated with water (or radio-opaque material if performed under fluoroscopy) to pressures that correspond to specific dilation diameters. The degree of dilation within a session should be based on the severity of the stricture by estimating the stricture diameter, followed by serial increases in the diameter of the dilating balloon. There are no data on the optimal duration the balloon should remain inflated, but national and international guidelines recommend inflation times from 30 to 60 seconds.
Balloon dilation has been the primary method for treating benign esophageal strictures for decades due to its effectiveness and safety. According to the current medical literature, about 80-90% of patients have relief of dysphagia but unfortunately, about 30-40%of patients eventually have a recurrence of dysphagia and require repeat dilation. Predictors for recurrence include the presence of a complex stricture, persistence of heartburn symptoms, presence of non-acid related strictures (radiation-induced or caustic ingestion), and eosinophilic esophagitis. Generally, the last dilator used in the previous dilation session should be used first.
There is also no consensus regarding how frequent the interval of balloon dilations should be performed. Helsema et al, conducted a retrospective study to determine the optimal target of endoscopic dilation of postsurgical esophageal strictures. Eighty-eight patients were dilated up to a maximum diameter of 16 mm and 91 patients to a diameter >16 mm. The stricture recurrence rate was 79.5 % in the 16 mm group and 68.1 %in the >16 mm group. They concluded that endoscopic dilation over 16 mm resulted in a significant prolongation of the dilation-free period in comparison with dilation up to 16 mm in patients with benign anastomotic strictures after esophagectomy. Pereira-Lima et al performed 1043 dilation sessions on 153 patients. Stricture's etiology was postsurgical in 80 patients, peptic in 37, caustic in 12, and from other causes in 11 patients. Adequate dilation was achieved in 93.5% of the patients (131 of 140). Patients with peptic strictures needed a median of three sessions to be adequately dilated during follow-up in comparison to five sessions among patients with postsurgical or caustic strictures. They concluded that endoscopic dilation is safe and effective in relieving dysphagia caused by benign strictures of different causes, although frequently repeated sessions are necessary because of stricture recurrence.
Study Type
Phase
- Not Applicable
Contacts and Locations
Study Locations
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Kentucky
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Lexington, Kentucky, United States, 40536
- University of Kentucky
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria
- more than 18 years old
- symptoms of dysphagia (difficulty swallowing) due to a benign esophageal stricture
- willing to be randomized to either arm of the study.
Exclusion Criteria:
- less than 18 years of age
- malignant esophageal stricture
- stricture located in the gastrointestinal tract other than the esophagus
- any benign or malignant stricture regardless of location in which the patient had previous mechanical or balloon dilation
- diagnosis of achalasia
- currently pregnant
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: Standard Balloon Dilation
Patients in this group will receive standard balloon dilation therapy.
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The standard approach involves a gradual balloon dilation where the balloon is inflated then held at each balloon size for 30-60 seconds then inflated to the next largest balloon diameter size and repeated to the maximum diameter size of that catheter.
The dilation session will be repeated as frequently and as many times as needed to achieve the balloon diameter size of 18mm at the discretion of the endoscopist.
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Experimental: Progressive Balloon Dilation
Patients in this group will receive progressive balloon dilation therapy.
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In the progressive approach, the balloon is continuously inflated over the course of 3-5 minutes starting at the smallest to the largest balloon diameter depending of the balloon catheter used.
The dilation will be repeated every 2-3 weeks (total of 2-3 sessions).
At the next endoscopic procedure, the balloon diameter used will be the next size up based on previous session.
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Change in Dysphagia
Time Frame: 1 year (at 1, 3, 6 and 12 months follow-up)
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Dysphagia will be measured using a 10-pt Likert scale in response to the question "In the last 7 days how would you rate the severity of your trouble swallowing."
Lower scores indicate less difficulty swallowing.
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1 year (at 1, 3, 6 and 12 months follow-up)
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Number of endoscopic dilation sessions
Time Frame: 3 weeks
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The number of endoscopic dilation sessions needed to achieve clinical success as defined by endoscopic and clinical resolution of dysphagia symptoms.
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3 weeks
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Number of balloons
Time Frame: 3 weeks
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The number of balloons needed to achieve clinical success as defined by endoscopic and clinical resolution of dysphagia symptoms.
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3 weeks
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Samuel H Mardini, MD, University of Kentucky
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Anticipated)
Study Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- 44391
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
product manufactured in and exported from the U.S.
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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