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Test Compendium

Test Name

  • CALCIUM, IONIZED, SERUM

Test Code

  • 2125

Test Synonym

  • Calcium, Ionized, IONIZED CALCIUM

Minimum Volume

  • 1 mL

Specimen Type

  • Serum

Primary Container

  • Ionized Calcium Sat-Unopened

Transport Temp

  • Refrigerated

TAT

  • 4 days

Specimen Requirements

  • separate SST tube for ionized calcium and adhere a piece of labeling tape over the top of the tube with the following written on it “Ionized Calcium -DO NOT OPEN.

Specimen Retention

  • Centrifuge and send unopened gel-barrier tube with vacuum intact. It is critical that the vacuum not be disrupted. Exposure of the serum to room air causes a loss of carbon dioxide to the atmosphere. This changes the sample pH and can prevent the lab from measuring the ionized calcium. To ensure that testing can be performed, send a separate tube for ionized calcium and adhere a piece of labeling tape over the top of the tube with the following written on it IONIZED CALCIUM-DO NOT OPEN.