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Post-bariatric surgery lab tests: are they excessive and redundant?
Terri Menser1,2,3, Jose Muniz Castro1, Adriana Lopez2
1Department of Surgery, Houston Methodist, 6550 Fannin Street, Smith Tower, Suite 1601, Houston, TX, 77030, USA.
Surgical Endoscopy
|November 3, 2019
Summary
Post-bariatric surgery nutritional testing often shows normal results, suggesting routine lab tests may be excessive. Patients with pre-existing deficiencies are at higher risk for future deficiencies.
Area of Science:
- Bariatric surgery outcomes
- Nutritional science
- Clinical laboratory testing
Background:
- Bariatric surgery necessitates ongoing monitoring for nutritional deficiencies.
- Established guidelines recommend specific postoperative laboratory testing schedules.
Purpose of the Study:
- To quantify the prevalence of nutritional deficiencies in bariatric patients.
- To evaluate the utility of recommended postoperative laboratory testing over two years.
Main Methods:
- Retrospective analysis of laboratory tests from 397 bariatric patients.
- Categorization of nine nutritional labs into six postoperative time periods.
- Logistic regression models to assess deficiency prevalence and predictors.
Main Results:
- Most routine nutritional lab tests showed low abnormality frequencies (<10% deficiency).
- Preoperative nutritional deficiency significantly predicted postoperative deficiencies (OR 3.70, p < 0.001).
Conclusions:
- Routine postoperative lab testing in bariatric patients may be redundant and costly.
- Identifying patients with preoperative deficiencies is crucial for targeted monitoring.
- Future research should establish cost-effective testing guidelines for at-risk populations.
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