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Secretin-induced plasma bicarbonate decrease as a simple indicator of exocrine pancreatic function

M Wettstein1, D Häussinger

  • 1Department of Medicine, Heinrich-Heine-University, Düsseldorf, Germany.

Pancreas
|August 1, 1996
PubMed
Summary
This summary is machine-generated.

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A simple blood test measuring plasma bicarbonate after secretin injection can effectively diagnose exocrine pancreatic dysfunction. This new method shows high sensitivity and specificity for detecting pancreatic exocrine deficiency.

Area of Science:

  • Gastroenterology
  • Pancreatic Physiology
  • Diagnostic Medicine

Background:

  • Exocrine pancreatic function is crucial for digestion.
  • Accurate diagnosis of pancreatic exocrine deficiency is essential for patient management.
  • Existing diagnostic methods can be invasive or complex.

Purpose of the Study:

  • To evaluate the utility of secretin-induced plasma bicarbonate decrease as a diagnostic marker for exocrine pancreatic function.
  • To determine the sensitivity and specificity of this novel tubeless test.

Main Methods:

  • Venous acid-base analysis was performed before and after secretin injection during a secretin-cerulein test.
  • Plasma bicarbonate levels were measured at 30 and 45 minutes post-injection.
  • Comparison of bicarbonate decrease in individuals with normal, partial, and global exocrine pancreatic deficiency.

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Main Results:

  • A significant decrease in plasma bicarbonate was observed in individuals with normal exocrine pancreatic function.
  • Patients with global exocrine pancreatic deficiency showed no significant decrease in plasma bicarbonate.
  • The maximal plasma bicarbonate decrease correlated with duodenal bicarbonate secretion (r = 0.62, p < 0.001).

Conclusions:

  • Secretin-induced plasma bicarbonate decrease is a reliable indicator of exocrine pancreatic function.
  • This method demonstrates high sensitivity (87%) and specificity (87%) in detecting global exocrine deficiency.
  • The secretin-induced plasma bicarbonate decrease offers a simple, tubeless alternative for evaluating exocrine pancreatic function.