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Potassium, Urine Timed

Potassium, Urine Timed

Epic Mnemonic
Sunquest Mnemonic

LAB436
U24K

Category

Chemistry

Methodology

Ion-Selective Electrode (ISE)

Test Performance Schedule

Sunday - Saturday

Result Availability

Within 24 hours

Specimen Required

Container

24-hour Urine Container, no preservative

Volume

Entire timed urine

Collection Instructions

• To begin collection of timed specimen, have patient urinate, noting the date and exact time

• Save all urine voided during the 2 hours, including the portion voided at exact end of time period

• Document date and time of final voiding on the label and requisition as the “end” of the timed specimen

 

24 Hour Urine Collection Instructions

Transportation Instructions

Refrigerate during and after collection

Stability

• Refrigerated:5 days

CPT Codes

81050, 84133

Effective/Revised

04/04/2017

Clinical Significance

Urinary potassium may be elevated with dietary (food and/or medicinal) increase, hyperaldosteronism, renal tubular acidosis, onset of alkalosis, and with other disorders. Time relationships are important in interpretation. Potassium will decrease in Addison disease and in renal disease with decreased urine flow (nephrosclerosis, pyelonephritis, glomerulonephritis).

 

 

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