Calcium, Ionized (Or Free)

Label Mnemonic:	ICA
Epic code:	LAB54
Downtime form:	Doctor/Provider Orders - Pathology Core and Specialty Care Nursery

Critical Care - Relocated to Core Laboratory
6240 RCP
356-3527

Specimen(s):

Serum, Plasma or Whole Blood

Collection Medium:

Heparinized syringe or Green top tube (Na Heparin)

Minimum:

0.5 mL in Lithium/Sodium Heparin syringe or,
Full draw; any size Lithium/Sodium Heparin green top tube.

Delivery Instructions:

Deliver to laboratory immediately after collection.

Testing Schedule:

24 hrs/day, 7 days a week, including holidays.

Turn Around Time:

10 minutes (upon receipt in laboratory)

Reference Range:

3.8-5.2 mg/dL for adults;
Reference Range for neonatal:
     0-5 Days: 4.2-5.9 mg/dL*
*neonatal ref. Values for ionized calcium, .... Scand J Lab Invest,
 1987, 47: 111-117.

Critical Care Critical Value:          <3.2 mg/dL and >5.9 mg/dL

Special Care Nurseries Critical Value: <3.0 mg/dL and >6.5 mg/dL

Comments:

Can be ordered with blood gases (0.5 mL blood required); all needles must be removed from the syringe before delivery.

This test is also performed in the Iowa River Landing (IRL) clinical laboratory (for specimens drawn at that site).

Methodology:

Ion Selective Electrode

CPT Code:

82330

See Additional Information:
Critical Care Critical Lab Values
Critical Care Pediatric Reference Ranges
Specimens Requiring Immediate Delivery