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* Calcium

Mnemonic

CA

Synonym

Ca - Ca++ - CaT - Calcium Total

Specimen Collection Requirements

Collect

Serum or Plasma, one 5.0 mL gold (SST), 7.0 mL red or 3.0 mL mint green (lithium heparin, PST) top tube

Handling

Allow serum to clot completely at room temperature (minimum: SST - 30 minutes and red top tubes - 60 minutes). Centrifuge and separate serum or plasma from cells before transport.

Preferred Volume

1.0 mL

Minimum Volume

0.25 mL Serum/Plasma, (Whole Blood 0.60 mL minimum draw)

Transport

Refrigerated (2-8°C)

Rejection Criteria

Grossly hemolyzed specimens

Stability

AFTER SEPARATION FROM CELLS: Ambient: (18-26°C): 7 days; Refrigerated (2-8°C): 22 days; Frozen (at or below -20°C): 1 year

Testing Information

Performed

7 days/week

Reported

24 hours

Method

Colorimetry

Reference Values

Reference Values

Critical Values

CPT Codes

82310

Last Updated: Wednesday, January 13, 2021 02:00:39 AM


Client Services: 503-413-1234