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Test Directory » Calcium, Ionized (whole blood)

Calcium, Ionized (whole blood)

Order Code: CAION

Test Summary

The ionized calcium is determined by an ion selective electrode methodology. The result that is generated is pH adjusted. The result is empirically based on a measured pH and ionized calcium concentration normalized to a pH of 7.40. This calculation compensates for in vitro changes in pH due to loss of CO 2 through specimen handling. Ionized calcium represents the true "bioavailable" calcium in the circulation. In situations where the total calcium is normal but does not fit the clinical picture, e.g., hyperparathyroidism, a determination of the ionized calcium will, many times, show an elevation in the "bioavailable" calcium component. This may be due to alterations in protein concentrations, especially albumin, that binds most of the calcium in the circulation.

Aliases

  • N/A

Specimen Collection

Special Instructions

N/A

Preferred Specimen

3 mL whole blood Sodium Heparin (dark green top) tube.

Minimum Volume

1 mL

Instructions

After specimen collected invert tubes 8 - 10 times, then transport tube on wet ice slurry to MVH or MVHSouth laboratory within 2 hours.

Patient Preparation

N/A

Storage

Sodium Heparin (dark green top) tube

Transport Temperature

Transport on ice slurry to laboratory within 2 hours of collection.

Specimen Stability

  • 2 hours on ice slurry
  • Room Temperature = 30 minutes
  • Refrigerated (ice slurry) = 2 hours
  • Frozen = n/a

Limitations

N/A

Other Acceptable Specimens

N/A

Unacceptable Specimens

Hemolysis, Lipemia, incorrect specimen type, insufficient sample volume, improper storage conditions, exceeds specimen stability guidelines, contaminated sample.

Order Code

CAION

EPIC (Premier) Code

LAB1052

Includes

N/A

CPT Code

  • 82330

Billing Code

  • 300177

CPT Statement

CPT Statement

Methodology

Ion Selective Electrode (ISE)

FDA Status

FDA Approved

Physician Attestation of Informed Consent

N/A

Testing Laboratory

CompuNet Clinical Laboratories, LLC
2308 Sandridge Drive
Moraine OH, 45439

Department

Chemistry

Reference Range

1.12 - 1.30 mmol/L

Setup Schedule / Expected Turnaround Time

24/7; Report available: 2 hours from receipt

Specimen Collection

Special Instructions

N/A

Preferred Specimen

3 mL whole blood Sodium Heparin (dark green top) tube.

Minimum Volume

1 mL

Instructions

After specimen collected invert tubes 8 - 10 times, then transport tube on wet ice slurry to MVH or MVHSouth laboratory within 2 hours.

Patient Preparation

N/A

Storage

Sodium Heparin (dark green top) tube

Transport Temperature

Transport on ice slurry to laboratory within 2 hours of collection.

Specimen Stability

  • 2 hours on ice slurry
  • Room Temperature = 30 minutes
  • Refrigerated (ice slurry) = 2 hours
  • Frozen = n/a

Limitations

N/A

Other Acceptable Specimens

N/A

Unacceptable Specimens

Hemolysis, Lipemia, incorrect specimen type, insufficient sample volume, improper storage conditions, exceeds specimen stability guidelines, contaminated sample.

Billing

CPT Code

  • 82330

Billing Code

  • 300177

CPT Statement

CPT Statement

Result Information

Methodology

Ion Selective Electrode (ISE)

Testing Laboratory

N/A

Reference Range

1.12 - 1.30 mmol/L

Setup Schedule / Expected Turnaround Time

24/7; Report available: 2 hours from receipt