A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #

Sodium, Arterial

Test Code
SODIUM,ARTERIAL


Alias/See Also
Chemistry


Preferred Specimen
Arterial blood in a lithium heparin syringe. 


Instructions
Must deliver to lab at room temperature withing 30 minutes of draw.


Transport Temperature
Transport on ice.


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
Sodium (Na+) is the most abundant cation in the extracellular space in the body. It is the major determinant of extracellular osmotic regulation and plays a central role in determining body fluid volume. Blood sodium levels are useful in diagnosing and treating conditions related to sodium imbalance, such as gastroenteritis, dehydration, Addison’s disease, and acute renal failure.


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.