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Published on: December 14, 2019
Exocrine pancreatic function and chronic unexplained dyspepsia. A case-control study
R C Smith1, N J Talley, O F Dent
1Department of Surgery, University of Sydney, Australia.
Summary
Some patients with nonulcer dyspepsia show diminished pancreatic function, indicated by low mean tryptic activity (MTA). This impaired function was linked to specific symptoms, suggesting pancreatic disease may underlie their unexplained dyspepsia.
Area of Science:
- Gastroenterology
- Pancreatic Physiology
- Digestive Health
Background:
- Nonulcer dyspepsia (NUD) affects a significant portion of the population.
- The underlying causes of NUD are often unclear, with pancreatic dysfunction being a potential, yet under-investigated, factor.
- Assessing pancreatic exocrine function is crucial for diagnosing digestive disorders.
Purpose of the Study:
- To investigate the prevalence of diminished mean tryptic activity (MTA) in the duodenal juice of patients diagnosed with nonulcer dyspepsia.
- To correlate MTA levels with specific clinical symptoms experienced by patients with NUD.
- To determine if impaired pancreatic function contributes to the symptoms of nonulcer dyspepsia.
Main Methods:
- Two studies were conducted: one with 100 patients suspected of pancreatic disease and another with 22 patients with confirmed NUD.
- A Lundh test meal was administered, followed by analysis of duodenal juice for mean tryptic activity (MTA).
- Receiver-operating-characteristic (ROC) analysis was used to establish a diagnostic threshold for MTA (7 microEq/mL/min).
Main Results:
- A threshold of 7 microEq/mL/min was identified as the best discriminator for pancreatic disease.
- Patients with unexplained dyspepsia did not show significantly different MTA from healthy controls.
- However, 27% of NUD patients had MTA below the threshold, indicating impaired pancreatic function, which was significantly higher than in healthy controls (p=0.02).
- These patients with impaired pancreatic function were more likely to experience back pain and sleep-disrupting pain, and less likely to have postprandial pain.
Conclusions:
- Pancreatic disease may be an underlying cause for symptoms in a subset of patients diagnosed with nonulcer dyspepsia.
- Diminished mean tryptic activity (MTA) can serve as an indicator of impaired pancreatic exocrine function in NUD patients.
- Further investigation into pancreatic function is warranted for patients with unexplained dyspeptic symptoms, particularly those with radiating or sleep-disrupting pain.
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