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Order Code RCHLU Chloride, Random, Urine

Important Note

Order a Miscellaneous Mayo Test, LABGOR, and provide the Mayo Test Code 

Reporting Name

Chloride, Random, U

Useful For

An indicator of fluid balance and acid-base homeostasis

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Urine


Specimen Required


Supplies: Sarstedt 5 mL Aliquot Tube (T914)

Container/Tube: Plastic, 5-mL tube

Specimen Volume: 5 mL

Collection Instructions:

1. Collect a random urine specimen.

2. No preservative.


Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time
Urine Refrigerated (preferred) 14 days
  Frozen  30 days
  Ambient  7 days

Reference Values

No established reference values

Random urine chloride may be interpreted in conjunction with serum chloride, using both values to calculate fractional excretion of chloride.

 

The calculation for fractional excretion (FE) of chloride (Cl) is

FE(Cl) =(Cl [urine] x Creat [serum])/(Cl [serum] x Creat [urine]) x100

CPT Code Information

82436

Method Description

The ion-selective electrode (ISE) module performs indirect measurement of electromotive force (EMF). The ISE module measures the EMF difference between an ISE and a reference electrode. The EMF of the ISE is dependent on the ion concentration of the sample. The EMF of the reference electrode is constant. An electronic calculation circuit converts EMF of the sample to the ion concentration of the sample.(Package insert: Chloride. Roche Diagnostics; 02/2018)

Reject Due To

All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.

Method Name

Potentiometric, Indirect Ion-Selective Electrode (ISE)

Forms

If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.

Day(s) Performed

Monday through Sunday