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Test Code LAB4158 PH, VENOUS

Specimen Type

Preferred Specimen: Heparinized Syringe
Alternative Specimen: Dark Green Lithium Heparin Tube (no gel)

Collection Instructions

Immerse specimen completely in ice water. Store and transport on ice water.

Specimen Volume

1 mL; if using green top tube, tube must be full

Minimum Volume

0.2 mL; if using green top tube, tube must be full

Turnaround Time

Test should be run within 30 minutes of collection

Test Schedule

Daily

Sample Stability

Room Temp: 30 min
On Wet Ice: 30 min to 1 hour

Method

Ion Transfer Electrode/Potentiometry/Co-oximeter

Reference Ranges

pH, Venous 7.35 – 7.45

Test Components

pH

CPT Codes

82800

Rejection Criteria

Specimen exposed to air or not kept on ice. Venous pH cannot be run on a tue whose cork was previously removed.