Specimen:

Urine

Collection Medium:

Alternate
Collection Media:

Call laboratory for additional acceptable specimen collection 
containers.

Minimum:

24 hr collection; no preservative (or random specimen).
Collections other than 24 hr will not be calculated for Meq/24 hr.

Testing
Schedule:

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

Analytic Time:

2 hours (upon receipt in laboratory)

Reference Range:

130-315 meq/24 hr

Methodology:

Ion Selective Electrode

Sample
Processing:

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

Sample
Storage:

Room temperature or refrigerate if stored overnight, weekends or 
holidays.

Transport
Instructions:

Place requisition in bag, seal bag, and tape securely to (urine) 
container.
Ship ambient or refrigerate.

Instructions:

Include date and time of 24 hour collection on requisition.  No 
preservative.  Send entire collection.

CPT Code:

84300

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