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Chloride, Arterial blood

Test Code
CHLORIDE,ARTERIAL


Alias/See Also
Chemistry


Preferred Specimen
Arterial blood in lithium heparin syringe. Must deliver to lab at room temperature withing 30 minutes of draw.


Specimen Stability
Must deliver to lab at room temperature within 30 minutes of draw


Setup Schedule
Daily


Report Available
TAT 1 day


Reference Range
Test Unit Reference Range     Reportable
    Arterial Venous Mixed Range
Sodium mmol/L 136-145     100-180
Potassium mmol/L 3.5 –5.1     1-10.1
Chloride mmol/L 98-107     72-158
Glucose mg/dL 65-95     18-685
Ionized calcium mg/dL 4.60-5.32
 		 4.64-5.32
 		   1.1-13.12
Lactic Acid Mmol/L 0.36-0.75 0.56-1.39   0.3-17
PH pH 7.35-7.45 7.32-7.43 7.32-7.43 6.80-7.92
PCO2 mmHg Male: 35-48
Female: 32-35		 Male: 41-52
Female: 38-41		 36-52 18-126
PO2 mmHg 83-108     42-501
HCO3* mmol/L 21-28 22-29 22-29  
BE* mmol/L (-2) - (+3) (-2) - (+3) (-2) - (+3)  
Anion Gap* mmol/L 10-20      
O2 SAT* % 94.0-98.0      
COHb % < 3.0 (nonsmoker)
< 10.0 (smoker)		 < 3.0 (nonsmoker)
< 10.0 (smoker)		 < 3.0 (nonsmoker)
< 10.0 (smoker)		 0.3-75
MetHb % 0.0-1.5 0.0-1.5 0.0-1.5 0.7-30
 
 
Critical values.
 
Analyte Results
SODIUM,ARTERIAL < 120 > 160
POTASSIUM,ARTERIAL < 2.8 > 6.0
CHLORIDE,ARTERIAL < 60 > 150
CALCIUM, ION. VENOUS < 3.0 > 6.5
CALCIUM, ION. ARTER < 3.0 >6.5
GLUCOSE, ARTERIAL 50 500


Clinical Significance
Chloride (Cl-) is the major extracellular anion in the body and plays a large role in maintaining electrical neutrality and normal osmolality. It also participates in the regulation of acid-base balance. The measurement of chloride is useful in assessing the patient’s overall fluid and electrolyte status.


Performing Laboratory
Test performed at West Roxbury Chemistry Lab
Contact: Jonathan Dryjowicz-Burek 857-203-5973


Last Updated: April 17, 2026


The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.