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* CALCIUM, IONIZED, WHOLE BLOOD, RESPIRATORY THERAPY

Mnemonic

RT CA ION

Synonym

Ionized Calcium - Calcium Free - Calcium - Ca Ionized POC - iCa

Guidelines

To be used for Inpatient, ED and/or surgical testing. Order as part of a Blood Gas Panel only.

Specimen Collection Requirements

Collect

Whole Blood, one lithium heparin blood gas syringe only

Handling

Do NOT send plasma tubes. All specimens should be collected under anaerobic conditions. Any loss of CO2 will increase the pH, which decreases ionized calcium. Do not store specimens on ice. Send unspun. Expel air from syringe before capping. Whole blood should be analyzed within 30 minutes of collection.

Minimum Volume

0.5 mL

Transport

Room Temperature

Rejection Criteria

EDTA, citrate, oxalate and sodium fluoride, severely hemolyzed specimens, specimens sent in plasma tubes

Stability

Ambient (20-25°C): 30 minutes; Refrigerated (2-8°C): 30 minutes; Frozen (at or below -20°C): Unacceptable

Testing Information

Performed

7 days/week

Method

Ion selective electrode

Reference Values

Reference Values

0 - 0.9 day:        1.08-1.28  mmol/L
1.0 - 1.9 days:    1.00-1.18 mmol/L
≥2 days:             1.12-1.26 mmol/L

Critical Values

Low: <0.76
High: >1.49

CPT Codes

82330

Last Updated: Thursday, January 5, 2017 03:40:42 AM


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