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Test Code Billings Clinic: 7031 Gastric Analysis, Routine, Gastric Secretions

Performing Laboratory

ARUP Laboratories


The capacity of gastric parietal cells to secrete hydrochloric acid (HCl) can be determined by the aspiration of gastric secretions and the assay of pH and calculation of hydrogen ion concentration and output per unit of time.

Specimen Requirements

  • Patient must be fasting for at least 12 hours (not even water) prior to specimen collection.
  • 10 mL of gastric aspirate in a screw-capped, sterile container.
  • No preservative.
  • Maintain sterility and forward promptly.
  • Date and time of collection, volume, color, and initial pH are required on request form for processing.

Reference Values

Reference values are included with patient’s report.

Day(s) Test Set Up

Monday through Friday

Test Classification and CPT Coding