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Test ID CAI Calcium, Ionized, Serum

Reporting Name

Calcium, Ionized, S

Useful For

Assessing calcium states during liver transplantation surgery, cardiopulmonary bypass, or any procedure requiring rapid transfusion of whole blood in neonates and critically ill patients

 

Second-order test in the evaluation of patients with abnormal calcium values

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type

Serum SST


Specimen Required


Container/Tube: Serum gel or serum gel microtainer

Specimen Volume: Full tube

Collection Instructions:

1. Allow blood to clot for 30 minutes.

2. Serum gel tube/microtainer must be centrifuged within 1 hour of draw time. Centrifuge with stopper in place for 7 minutes at 3,000 rpm to ensure that the gel barrier separates the serum and cells.

3. Keep specimen anaerobic do not aliquot.


Specimen Minimum Volume

1.75 mL in a 3.5 mL (50% full) in serum gel tube or 1 full serum gel microtainer

Specimen Stability Information

Specimen Type Temperature Time
Serum SST Refrigerated 7 days

Reference Values

IONIZED CALCIUM

≤13 days old: not established

14 days-<1 year: 5.21-5.99 mg/dL

1-<2 years: 5.04-5.84 mg/dL

2-<3 years: 4.87-5.67 mg/dL

3-<24 years: 4.83-5.52 mg/dL

24-≤97 years: 4.57-5.43 mg/dL

≥98 years: not established

 

pH

≤13 days old: not established

14 days-97 years old: 7.35-7.48

≥98 years old: not established

Day(s) and Time(s) Performed

Monday through Sunday; Continuously

Test Classification

This test has been modified from the manufacturer's instructions. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information

82330

LOINC Code Information

Test ID Test Order Name Order LOINC Value
CAI Calcium, Ionized, S In Process

 

Result ID Test Result Name Result LOINC Value
CAIS Calcium, Ionized, S 17864-0
PHCC pH 2753-2

Reject Due To

Hemolysis

Mild OK; Gross reject

Lipemia

NA

Icterus

NA

Other

Tubes less than 50% full; Specimens that have been aliquoted, opened, or poorly centrifuged.

 

Method Name

Ion-Selective Electrode (ISE)

Secondary ID

8378