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Test Code 1778 Calcium, Ionized, Blood

Performing Laboratory

Barnes-Jewish Hospital Laboratory

Methodology

Direct Ion-Selective Electrode (ISE)

Literature Reference:

Reference manual: ABL 800 FLEX Series. Radiometer America, Bronshoj Denmark, 2009.

Specimen Requirements

Patient Preparation:Fasting specimen is preferred but not required.

 

Specimen must be received in the laboratory within 2 hours of draw.

 

Hospital Patient:

Specimen Type: Whole blood, heparinized

Container/Tube: Sims-Portex blood gas syringe

Specimen Volume: Full syringe

 

Collection Instructions: Avoid prolonged venous stasis when drawing blood.

Additional Information: Send capped syringe (no needle attached) to the laboratory.
 

Non Hospital Patient:

Call Barnes-Jewish Hospital Laboratory Customer Service at 314-362-1470 prior to collection to schedule a STAT pick-up.

 

Specimen Type: Whole blood, heparinized

Container/Tube: Sims-Portex blood gas syringe

Specimen Volume: Full syringe

 

Collection Instructions: Avoid prolonged venous stasis when drawing blood.

Additional Information: Send capped syringe (no needle attached) to the laboratory.

Day(s) Test Set Up

Monday through Sunday
Turnaround Time:
STAT: 15 minutes after receipt in laboratory
Routine: not available

Reference Values

0-18 years: 3.9-5.2 mg/dL

≥18 years: 4.5-5.1 mg/dL

Critical result (automatic call-back): ≤3.2 mg/dL or ≥7.0 mg/dL

Literature References:

Ladenson JH, et al. Relationship of free and total calcium in hypercalcemic conditions. J Clin Endocrinol Metab 1979;48:393-7.

Test Classification and CPT Coding

82330

Additional Information

For BJH Laboratory Use Only
Analyte Stability:

See Analyte Stability Chart in Special Instructions.

Once opened the specimen is no longer suitable for add on.

Laboratory Processing Instructions:

Test performed in BJH Chemistry. Deliver to the blood gas workstation immediately.

Specimen Transport Temperature

Ambient/Refrigerate NO/Frozen NO

Special Instructions

LOINC Code Information

Name LOINC Code
Calcium, Ionized, Blood 38230-9