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pH, Fluid
MessageTest performed on peritoneal fluid, pleural fluid or jackson pratt drainage.
Test Code
PH, FLUID
Alias/See Also
Chemistry
PH FLUID
PH FLUID
Minimum Volume
2 mL
Transport Temperature
Refrigerate
Specimen Stability
Stable on ice up to 2 hours.
Methodology
pH paper
Setup Schedule
Daily
Report Available
TAT 1 day
Limitations
Fluid PH test was developed and its performance
characteristics determined by VA BHS Laboratory. It has not been cleared or
approved by the FDA. The laboratory is regulated under CLIA as qualified to
perform high-complexity testing.This test is used for clinical purposes. It
should not be regarded as investigational or for research.
characteristics determined by VA BHS Laboratory. It has not been cleared or
approved by the FDA. The laboratory is regulated under CLIA as qualified to
perform high-complexity testing.This test is used for clinical purposes. It
should not be regarded as investigational or for research.
Reference Range
not established
Clinical Significance
Pleural fluid pH measurement has the highest diagnostic accuracy in assessing the prognosis of parapneumonic effusions. A parapneumonic exudate with a pH greater than 7.3 will generally resolve completely with medical therapy alone. A pH less than 7.2 indicates a complicated parapneumonic effusion, requiring surgical drainage. Patients with borderline complicated exudates between 7.2-7.3 may be closely watched, with repeat measurements. A pH value below 6.0 is characteristic of esophageal rupture.
Ascetic Fluids- pH may be helpful in the diagnosis of SBP in patients with cirrhotic ascites, especially if used in conjunction with leukocyte counts. A pH less than 7.32 has a reported sensitivity and specificity of about 90% for SBP. Patients with ascetic fluid pH of less than 7.15 have a poor prognosis. Low pH is also found in patients with malignant and pancreatic ascites and tuberculosis peritonitis.
Ascetic Fluids- pH may be helpful in the diagnosis of SBP in patients with cirrhotic ascites, especially if used in conjunction with leukocyte counts. A pH less than 7.32 has a reported sensitivity and specificity of about 90% for SBP. Patients with ascetic fluid pH of less than 7.15 have a poor prognosis. Low pH is also found in patients with malignant and pancreatic ascites and tuberculosis peritonitis.
Performing Laboratory
Test performed at West Roxbury Chemistry Lab
Contact: Jonathan Dryjowicz-Burek 857-203-5973
Last Updated: July 7, 2021
