Dumping Syndrome After Esophagectomy

May 21, 2026 updated by: Seong Yong Park, Samsung Medical Center

Prospective Observational Study on the Utility of Continuous Glucose Monitoring for the Diagnosis of Dumping Syndrome After Esophagectomy

Background:

Dumping syndrome is a common complication for patients who have undergone surgery for esophageal cancer. It occurs when food moves too quickly from the stomach (or the reconstructed gastric tube) into the small intestine. This rapid movement causes various symptoms such as bloating, abdominal pain, dizziness, rapid heartbeat, and sweating. Sometimes, it leads to "late dumping," where blood sugar levels drop significantly, causing tremors, cold sweats, and fatigue. Currently, there is no standardized tool to easily diagnose this condition after esophagectomy.

Purpose of the Study:

The objective of this study is to evaluate the effectiveness of Continuous Glucose Monitoring (CGM) in diagnosing dumping syndrome. CGM is a small, wearable sensor that tracks glucose levels in real-time. The investigators aim to determine whether CGM can serve as a valuable tool for the early detection of dumping syndrome in patients who have undergone esophagectomy.

Study Overview

Status

Recruiting

Conditions

Study Type

Observational

Enrollment (Estimated)

30

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

  • South Korea
    • Gangnam-gu Irwon-Ro 81
      • Seoul, Gangnam-gu Irwon-Ro 81, South Korea, 06351
        • Recruiting
        • Samsung Medical Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

Patients registered at Samsung Medical Center

Description

Inclusion Criteria:

-1. aged 18 or older. 2. people who underwent esophagectomy and gastric tube reconstruction for esophageal cancer.

3. Sigstad score of 7 or higher.

Exclusion Criteria:

  • 1. Diabetes with autonomic neuropathy. 2. Inability to complete the diagnostic procedure (e.g., cognitive decline). 3. Refusal to participate.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Diagnostic Agreement Between CGM and OGTT for Dumping Syndrome
Time Frame: Up to 10 days after enrollment, during concurrent OGTT and CGM measurement
The agreement between dumping syndrome diagnosed by the Oral Glucose Tolerance Test (OGTT) and that diagnosed by Continuous Glucose Monitoring (CGM) will be evaluated. Using a predefined glucose cut-off value (e.g., $60\text{ mg/dL}$), the Cohen's Kappa coefficient and its 95% confidence interval will be calculated to assess the level of consistency. A Kappa value of 0.6 or higher is expected to indicate substantial agreement.
Up to 10 days after enrollment, during concurrent OGTT and CGM measurement

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Diagnostic Accuracy of CGM Using Specific Glucose Cut-off Values
Time Frame: Up to 10 days after enrollment, during concurrent OGTT and CGM measurement
To evaluate the diagnostic performance of CGM relative to the gold standard OGTT, measures of diagnostic accuracy-including sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV)-will be calculated. Each metric will be reported with its corresponding 95% confidence interval. The analysis will focus on assessing the clinical validity of the 60 mg/dL threshold (or other relevant cutoffs) for detecting dumping syndrome.
Up to 10 days after enrollment, during concurrent OGTT and CGM measurement

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Samsung Medical Center

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

June 15, 2026

Primary Completion (Estimated)

December 31, 2028

Study Completion (Estimated)

December 31, 2028

Study Registration Dates

First Submitted

May 15, 2026

First Submitted That Met QC Criteria

May 21, 2026

First Posted (Actual)

May 26, 2026

Study Record Updates

Last Update Posted (Actual)

May 26, 2026

Last Update Submitted That Met QC Criteria

May 21, 2026

Last Verified

May 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • SMC-2025-06-033

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

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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