24 hour urine collection preferred but a second void of the morning is acceptable. 

When monitoring therapy, baseline samples should be collected prior to initiation of therapy. Subsequent specimens should be collected at the same time of day as baseline specimens.

24 Hour Urine Collections:
1. To begin the collection, empty the bladder and discard this urine. Record this time and date as the start of the collection.
2. 24 hour urine collections should be started Sunday through Thursday.
3. Collect all urine excreted during the next 24 hours in the urine collection container.
4. Exactly 24 hours after the collection was begun, empty the bladder for the last time. Add this urine to the 24 hour urine container. The collection is finished.
5. The container should be refrigerated during and after the 24 hour collection period until it can be brought to Saint Luke’s Regional Laboratories.

Frozen - 14 days
Refrigerated - 14 days
Room temperature - 14 days

Samples that have whole blood contamination, hemolysis or specimens containing preservative will be rejected.

82570 - Creatinine (Telopeptide) (EAP 30031470)
82523 - N-telopeptide Urine (EAP 30040669)
81050 - Urine Volume Measurement (if 24 hour urine collection) (EAP 30033360)