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PH, BODY FLUID

Mnemonic

BF PH

Synonym

pH

Guidelines

Acceptable specimen types include Gastric Fluid, Pleural Fluid, Pericardial Fluid, Peritoneal or Ascitic Fluid (including renal, pancreatic, biliary, drainage, or dialysates) and Synovial Fluid.

Specimen Collection Requirements

Collect

Preferred: Collect specimen anaerobically, directly into a heparinized blood gas syringe. Any air present should be expelled and the syringe capped.

Also Acceptable: 3.0 mL mint green (PST), 5.0 mL gold (SST), or 7.0 mL red top tube, sterile capped plastic syringe, or large, vacuum-sealed container.

Handling

The specimen type must be written on the container and on the requisition. Place the specimen on ice and deliver to the laboratory immediately; pH will change with time. If transport is delayed, refrigerate the specimens at 2-8°C. If specimen contains particulate, cellular matter, or clots, centrifuge before testing.

If the specimen is collected in large vacuum-sealed container, it should be transferred into a heparinized blood gas syringe before transporting between Legacy Laboratory sites.

Preferred Volume

2.0 mL

Minimum Volume

1.5 mL

Transport

INPATIENTS: Place the specimen on ice and deliver to the laboratory immediately.

OUTREACH: Refrigerate (2-8°C)

Rejection Criteria

Samples that are viscous, contain large particulates (i.e. intraosseous samples), have insufficient volume, have been treated with hyaluronidase, or received in collection containers other than those listed above.

Stability

Ambient (18-26°C): <60 minutes; Refrigerated (2-8°C): 24 hours; Frozen (≤ -20°C): Unacceptable

Testing Information

Performed

7 days a week

Reported

24 hours

Method

Ion selective electrode

Reference Values

Reference Values

Not established

CPT Codes

83986

Last Updated: Thursday, January 5, 2017 03:41:30 AM


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