Electrolyte Urine 24 Hour

SIM

13050 

CPT

84300; 84133; 82436 

Synonyms

Specimen Type

Voided 24 hour Urine 

Container

24 hour urine container

Collection Instructions

•  Collect all urine voided for 24 hours and place in the 24 hour urine container. 
•  The collection container is to be kept in the refrigerator or on ice during the timed period. 
•  Note the number of hours of urine collection on the aliquot.

Volume

Max: 5 ml preferred 
Min:  1 ml

Additional Information

none

Patient Preparation

none

Specimen Processing Instructions

Refrigerate

Note the number of hours of urine collection on the aliquot.

Transport Requirements

Refrigerated

Specimen Stability

Refrigerated: 72 hours 

Rejection Criteria

Insufficient volume

Reference Range

Urine Sodium =      40 – 220 mmoL/24 hr    

Urine Potassium =  40 - 80 mmoL/24 hr        

Urine Chloride =    110 - 250 mmoL/24 hr

Critical Value

none 

Test Includes

Urine Sodium; Urine Potassium; Urine Chloride  

Methodology

See Below 

Testing Frequency

Daily, Monday - Sunday 

Reviewed By

Crystal Killian

Reviewed Date

3/18/2021

Supplemental

Methodology:
Urine Sodium = Indirect Potentiometry utilizing two glass sodium electrodes

Urine Potassium = Indirect Potentiometry utilizing a potassium ion selective electrode in conjunction with a sodium reference electrode.

Urine Chloride = Indirect Potentiometry utilizing a solid state chloride electrode in conjunction with a glass sodium reference electrode