Test directory: Catecholamines, Frac, 24Hr Urn w/Cr

Ordering Code 377
Test Name Catecholamines, Frac, 24Hr Urn w/Cr
Alias Catecholamines, Fractionated, 24-Hour Urine with
Creatinine
Preferred Specimen Urine, 24 Hour
Aliquot from a 24-hour urine that has been preserved with 25 mL 6N HCl, collected in a plastic, 24-hour urine container
Preferred Container 24 Hour Urine Container, 24 Hour Urine Aliquot
Other Specimen/Container Aliquot from a 24-hour urine, unpreserved, with a pH < or = 6, collected in a plastic, 24-hour urine container
Optimum Volume 2 mL
Collection Instructions Patient Preparation:
It is preferable for the patient to be off medications for three days prior to collection. However, common antihypertensives (diuretics, ACE inhibitors, calcium channel blockers, alpha and beta blockers) cause minimal or no interference. Patient should avoid alcohol, coffee, tea, tobacco and strenuous exercise prior to collection.
Instructions:
Collect 24-hour urine with 25 mL 6N HCl to maintain a pH < or = 3. If no preservative is used, specimen must be stored refrigerated during collection but shipped frozen and pH must be < or = 6. Record 24-hour urine volume and patient's age on test request form and on urine container.
Handling Instructions Adjust to pH<3 with 6N HCl.
Transport Requirements Oahu: Refrigerated
Airline: Frozen
Specimen Stability Ambient: Not Stable
Refrigerated Preserved Urine: 30 Days
Refrigerated Unpreserved Urine: 7 Days
Frozen: 60 Days
Rejection Criteria Preserved urine received refrigerated with pH >3,
Unpreserved urine received frozen with pH >6
Avail. Stat NO
Analytic Time 10 Days
Methodology Liquid Chromatography/Mass Spectrometry
Reference Lab  Quest Diagnostic Lab-NI

Reference range(s)

The reference ranges listed below are valid on this date of March 26, 2026.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
Total Volume ALL See report.
Creatinine, 24 Hr Urine ALL See report.
Epinephrine, 24 Hr Urine ALL See report.
Norepinephrine, 24 Hr Urine ALL See report.
Calculated Total (E+NE) ALL See report.
Dopamine, 24 Hr Urine ALL See report.