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Test Code LAB5106 Calcium, Ionized

Performing Laboratory

Asante Rogue Regional Medical Center / Asante Three Rivers Medical Center / Asante Ashland Community Hospital

Specimen Minimum Volume

1.0 ml

Billing Code

2050185

Methodology

Ion Selective Electrode

Specimen Requirements

NO PST gel

 

Whole blood, invert tube 5-8 times after collection, keep on wet ice. transport to the lab immediately.

 

Sodium Heparin Dark Green top tube

or

Lithium Heparin Plain Dark Green top tube  

 

Specimen may be collected at any time

Day(s) Test Set Up

Monday - Sunday

Run STAT, testing must be performed within 30 minutes of receipt in the lab 

Test Classification and CPT Coding

82330  -  Calcium; ionized 

Additional Information

Calcium has many important physiological functions, including muscle contraction, hormone secretion, glycogen metabolism and cell division.  Extracellular calcium provides a source for maintenance of intracellular calcium and has an important role in providing calcium ion for bone mineralization.  Calcium stabilizes plasma membranes and influences permeability and excitability.  A decrease in free (ionized) calcium increases neuromuscular excitability and tetany.

Specimen Transport Temperature and Stability

 

Keep on wet ice, transport to lab immediately

Do not uncap tube until immediately prior to analysis

Run as soon as possible, maximum stability is 4 hours if refrigerated (or on wet ice) at 2° to 8°C

 

For TRMC- Specimen must be received in the lab within 30 minutes of collection for testing or the specimen will be rejected.

Reasons for Rejection

Hemolysis

Quantity not sufficient (QNS)

Lack of Two Patient Identifiers:

         1-Patient's First & Last name 

         2-Patient's Date of Birth

Performing Department

Chemistry