Specimen:

(Urine) Time Collection

Collection Medium:

Alternate
Collection Media:

Call laboratory for additional acceptable specimen collection 
containers.

Minimum:

24 hr urine collection, no preservative

Testing
Schedule:

24 hrs/day, 7 days a week, including holidays.

Analytic Time:

1 hour (upon receipt in laboratory)

Reference Range:

<20 micrograms/minute.  Not for use in patients with dipstick positive
proteinuria

Comments:

(Creatinine done on sample at no additional charge) Sample with urine 
protein > 30 mg/dl will have microalbumin credited, and urine protein 
result reported and charged.

Test
Limitations:

Criterion: Recovery within plus or minus 10% of initial value.

Icterus: No significant interference up to an approximate conjugated 
bilirubin concentration of 66 mg/dl.

Hemolysis: No significant interference up to an approximate hemoglobin 
concentration of 300 mg/dl.

No interference from acetone is less than 60 mmol/l, ascorbic acid is 
less than 1 g/l, creatinine is less than 5 g/l, glucose is less than 20 
g/l, uric acid is less than 700 mg/l, urea is less than 700 mmol/l and 
urobilinogen is less than 338 mg/l.

Methodology:

Turbidometric

Sample
Processing:

Submit urine in leak-proof plastic container.
Label transport tube with two patient identifiers, date and time of 
collection.

Sample
Storage:

Refrigerate.

Transport
Instructions:

Place requisition in bag, seal bag, and tape securely to (urine) 
container.
Transport in cooler with refrigerated coolant packs.

Instructions:

Submit entire 24 hour collection.  Record date and time of collection 
on requisition.

CPT Code:

82043

See Additional Information:
Urine Collection, 24 Hour
Urine Tests Requiring no Preservatives