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Test Code LAB2925 Circuit Calcium Ionized

Clinical System Name

Circuit Calcium Ionized

Synonyms

LAB2925

CRT Ca Ion

Sample Requirements

Specimen: Whole Blood

Container(s): Heparinized Syringe, 2 Capillary Blood Gas Tubes

Preferred Vol: 0.5 mL in a Heparinized Syringe, or 2 Capillary Blood Gas Tubes

Minimum Vol:  2 Heparinized Capillary Blood Gas Tubes. (EPOC capillary tubes are not acceptable).

 

Note: Use only Arterial Blood Sample syringe with dry Lithium Heparin for gases and electrolytes or heparinized capillary blood gas tubes. Sample can be shared with a CBG if capillary blood gas tubes are collected. Send to the lab immediately. Avoid air bubbles. Expel air from syringe and cap it immediately after obtaining the sample. Capillary blood gas tubes must be filled completely and mixed thoroughly to dissolve and disperse the heparin. EPOC capillary tubes are not acceptable. Ideally, whole blood specimens should be analyzed within 15 minutes of blood draw.

Processing Instructions

Reject due to: Inadequately filled specimens, air bubbles, visible clots, age of specimen

Spin: N

Aliquot: N

 

Off-site collection: Samples collected outside Children's may be drawn in a balanced heparin syringe and sent at 0-4o C within 4 hours.

Stability

Specimen Type Temperature Time
Heparinized Syringe, Heparinized Capillary Blood Gas Tube RT 30 min
Heparinized Syringe, Heparinized Capillary Blood Gas Tube 0-4 C 4 H
  -20 C or -70 C N

Availability

STAT Performed TAT
Y 24/7 15 min

Performing Laboratory

Seattle Children's Laboratory  

Department

Department:  Chemistry - Core

Phone Number: 206-987-2617 (Client Services)

CPT Codes

82330

Methodology

Method: Potentiometric method by SIEMENS RAPIDPOINT 500

 

Analytical Volume:

AGE VOLUME
0-2 Y 1 FULL Heparinized Capillary Blood Gas Tube
> 2 Y 0.5 mL Heparinized Syringe

Reference Range

 Age mMol/L
<1 Y 1.16 - 1.45
1 - 4 Y 1.17 - 1.35
4 - 14 Y 1.18 - 1.30
> 14 Y 1.18 - 1.27

Critical Values

≤ 0.75 mMol/L

≥ 1.75 mMol/L