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Risk evaluation of postvagotomy ulcer recurrence by using endoscopic Congo red test and gastric secretion tests
A Peetsalu1, M Harkonen, M Peetsalu
1Department of Surgery, University of Tartu, Estonia.
Hepato-Gastroenterology
|December 5, 1998
Summary
The endoscopic Congo red test (ECRT) effectively identifies patients at high risk for recurrent ulcers after vagotomy. Negative ECRT results suggest a low risk, reducing the need for further gastric secretion tests.
Area of Science:
- Gastroenterology
- Surgical Outcomes
- Diagnostic Accuracy
Background:
- Postvagotomy recurrent ulcer (RU) remains a clinical challenge.
- Accurate risk stratification is crucial for patient management after vagotomy.
Purpose of the Study:
- To assess the utility of the endoscopic Congo red test (ECRT) for identifying high-risk patients for postvagotomy RU.
- To compare the diagnostic performance of ECRT with other tests for RU risk.
Main Methods:
- A study involving 271 postvagotomy duodenal ulcer patients evaluated ECRT 5-12 years post-surgery.
- 39 patients were classified into ECRT-positive RU and control groups.
- Gastric acid output (BAO, MAO, NAO), serum pepsinogen I (S-PGI), and insulin tests were analyzed.
Main Results:
- ECRT demonstrated 95% sensitivity and 53% specificity for detecting RU.
- S-PGI (> 150 microg/l) showed 54% sensitivity and 92% specificity.
- The insulin test yielded 83% sensitivity and 78% specificity; BAO+NAO combination showed 80% sensitivity and 81% specificity.
Conclusions:
- ECRT is a valuable primary tool for estimating postvagotomy ulcer risk.
- A negative ECRT suggests a low likelihood of recurrent ulcer development.
- Further gastric secretion studies (S-PGI, BAO+NAO, insulin test) are primarily indicated for ECRT-positive cases.