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Test ID: UPHB    
pH, Body Fluid

Useful For Suggests clinical disorders or settings where the test may be helpful

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

Clinical Information Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test

The pH value is a measure of hydrogen ion concentration. A variety of disease processes can alter pH values. Determining the pH value of a body fluid may help characterize the nature of the fluid.

Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.

Varies with fluid type and location.

Interpretation Provides information to assist in interpretation of the test results

Normal gastric fluid has a pH <3.5; any higher pH is abnormal.

Cautions Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances

No significant cautionary statements

Clinical Reference Provides recommendations for further in-depth reading of a clinical nature

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