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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.  

Sample must be tested within 30 minutes of collection, for outpatient testing, it must be collected at one of the following Bronson locations:

  • Bronson Methodist Hospital Outpatient Testing: 601 John St., 1st floor South Campus, Kalamazoo, MI 49007
  • Bronson Battle Creek Lab: 300 North Ave., Battle Creek, MI 49037
  • Bronson Lakeview Hospital Outpatient Testing:  408 Hazen St., Paw Paw, MI 49079
  • Bronson South Haven Hospital:  955 South Bailey Ave.,  South Haven, MI 49090

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, Paw Paw, South Haven

Bronson Battle Creek - Respiratory Care Department 

CPT Code

82800

LOINC Code

2746-6