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Mucosal Impedance Balloon in Diagnosis and Treatment of Eosinophilic Esophagitis (EoE)

Study Purpose

This study will evaluate the role the balloon mucosal impedance may have in diagnosing and monitoring the patients with Eosinophilic Esophagitis. We will compare the results of the balloon mucosal impedance in patients with Eosinophilic esophagitis and controls.

Recruitment Criteria

Accepts Healthy Volunteers

Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms

Study Type

An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes.

An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes.

Searching Both is inclusive of interventional and observational studies.

Eligible Ages 18 Years - 90 Years
Gender All
More Inclusion & Exclusion Criteria

Inclusion criteria:

  • - Adults ages 18-90 undergoing clinically indicated upper endoscopy - Patients with EoE, defined as dysphagia with histologic finding of greater than or equal to 15 eosinophils per high powered field on esophageal biopsy despite at least 6 weeks of twice daily proton pump inhibitor therapy - Patients undergoing clinically indicated upper endoscopy for indications other than dysphagia or GERD with normal appearing esophageal mucosa.

Exclusion criteria:

- Medical conditions such as severe heart or lung disease that preclude safe performance of endoscopy - Patients with conditions known to be associated with esophageal eosinophilia, including Crohn's disease, Churg-Strauss, achalasia, and hypereosinophilic syndrome - Inability to read due to: Blindness, cognitive dysfunction, or English language illiteracy

Trial Details

Trial ID:

This trial id was obtained from ClinicalTrials.gov, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.


Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans.

Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data.

Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs.

Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.

Lead Sponsor

The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.

Mayo Clinic
Principal Investigator

The person who is responsible for the scientific and technical direction of the entire clinical study.

David A Katzka
Principal Investigator Affiliation Mayo Clinic
Agency Class

Category of organization(s) involved as sponsor (and collaborator) supporting the trial.

Overall Status Recruiting
Countries United States

The disease, disorder, syndrome, illness, or injury that is being studied.

Eosinophilic Esophagitis, Healthy
Study Website: View Trial Website
Additional Details

The standard diagnostic evaluation for EoE includes upper endoscopy with esophageal biopsies. Recently we completed the study "Mucosal impedance in eosinophilic esophagitis and the effect of treatment" using a new technology allowing for direct assessment of mucosal impedance at the time of routine upper endoscopy to assess esophageal integrity and disease activity and alevate the need for biopsies. For this study, Sandhill Scientific has customized a Mucosal Impedance balloon (MI) assembly to provide precise measurements over a broad area of esophageal epithelium, while eliminating the fluids and spanning across a 10 mm luminal area using the same direct assessment as the mucosal impedance at the time of routine upper endoscopy.

Arms & Interventions


: Mucosal Impedance Balloon catheter

At the conclusion of the endoscopy, all fluids will be aspirated from the esophagus. The endoscope will then be left in place in the mid-esophagus and a custom Mucosal Impedance (MI) balloon assembly four axial arrays of 10 sensors (total of 40 sensors) will be positioned along the esophageal mucosal wall under direct visualization to directly measure MI at uniform intervals. Once in place, impedance readings will be recorded for a total of 2 minutes. At this point both the endoscope and impedance catheter will be withdrawn simultaneously.


Device: - Mucosal Impedance Balloon catheter

During the clinical endoscopy (a standard procedure that allows your doctor to look at the inside of your swallowing tube), the 2 mm catheter (tiny tube), called an Intraluminal Impedance Balloon, will be passed through the channel of the standard endoscope. o The catheter (tiny tube) will be placed through the endoscope in your esophagus (swallowing tube) for two minutes, readings from the catheter will be recorded.

Contact a Trial Team

If you are interested in learning more about this trial, find the trial site nearest to your location and contact the site coordinator via email or phone. We also strongly recommend that you consult with your healthcare provider about the trials that may interest you and refer to our terms of service below.

Mayo Clinic in Rochester, Rochester, Minnesota




Mayo Clinic in Rochester

Rochester, Minnesota, 55905

Site Contact

Debra M. Geno, CRC



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