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Lab Manual for UCSF Clinical Laboratories

Lab Manual for SFGH

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pH

Item Value
Available Stat? No
Test code FPH
Performed by? Chemistry
Sendout? no
Price range $
In House Availability Monday - Friday
Principle H+ concentration is measured by pH meter.
Interpretation 1. Pleural Fluid - a pH of less than 6 is highly suggestive of esophageal rupture. A pH of less than 7.3 is predictive of complicated effusions.

2. CSF - lumbar fluid pH = 7.28 - 7.32.

3. Cisternal fluid pH = 7.32 - 7.34

4. Urine - pH indicates acid-base status of patient.
Amount to Collect 1.5 mL
Collection Instructions Specimens must be sent to laboratory on ice.
Sample type Body Fluid, specify type
Special instructions Urine and CSF require Laboratory Medicine Resident's approval.
Stability 72 hours 2-8°C.
References 1. Tietz, N.W. ed.: Fundamentals of Clinical Chemistry. 5th ed. W.B. Saunders, Philadelphia. PA. (2001), pp. 505-515.

2. Bluth, MH et al..: Laboratory Diagnosis of Gastrointestinal and Pancreatic Disorders. In Clinical Diagnosis and Management by Laboratory Methods. 21st ed., W.B. Saunders, Philadelphia, PA. (2007).
CPT coding 83986
Last Updated 11/12/2008 11:24:35 AM
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