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Test Code PHV or LAB75 pH, venous, Blood

Important Note

Venous pH is a whole blood test. Do not centrifuge samples.

Specimen Requirements

Container Type:

Optimal:  Green

 

Acceptable: Mint or Heparin syringe

   
Optimal Collection Volume: 

5 mL; full tube or full syringe
Minimum Volume:

1 mL whole blood
Collection Instructions:
  1. Gently invert the sample 5-6 times after collection.
  2. Send sample promptly to lab for testing.
Specimen Transport:

Refrigerated
Processing Instructions: 
  1. Do not centrifuge sample.
  2. Bring directly to chemistry and place on ice until testing can be performed.

Specimen Stability

Assay as soon as possible

Specimen Rejection Criteria

Quantity not sufficient

Useful For

The pH value of blood may be the most valuable factor in the evaluation of acid-base status of a patient. The pH value is an indicator of the balance between the buffer (blood), renal (kidney) and respiratory (lung) systems, and one of the most tightly controlled parameters in the body.

Methodology

Radiometer - Potentiometric

Reference Ranges

7.32-7.42

 

Critical Values

  • ≤ 7.20
  • ≥ 7.60

Day(s) Performed

24/7

Expected TAT

Same day

Performing Laboratory

Bronson Laboratory, Chemistry - Kalamazoo, Battle Creek, Paw Paw, South Haven

Sample Retention Time

7 days

CPT Code

82800

LOINC Code

2746-6