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Test Code PHBF pH, Body Fluid

Reporting Name

pH, BF

Useful For

Gastric fluid pH can help determine if acid production in the stomach is normal.

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Body Fluid

Specimen Required

Container/Tube: Metal-free container (T173)

Specimen Volume: 5 mL

Additional Information: Indicate specimen source.

Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Body Fluid Refrigerated (preferred) 7 days
  Frozen  7 days
  Ambient  24 hours

Reference Values

See Comment

Day(s) and Time(s) Performed

Monday through Sunday; Continuously

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
UPHB pH, BF 2748-2


Result ID Test Result Name Result LOINC Value
U_PHB pH, BF 2748-2
SRC18 Source 14725-6

Clinical Reference

Kaplan LA, Pesce AJ: Clinical Chemistry. Third edition. Mosby-Year Book Inc, 1996, p 823

Method Description

pH meter

Analytic Time

Same day/1 day

Reject Due To

Other Chest (thoracic) fluid, thoracentesis, or pleural fluid

Method Name

pH Meter

Secondary ID