Methodology
Liquid Chromatography, Tandem Mass Spectrometry (LC/MS/MS)
Specimen Type
Urine, Timed Collection
Performing Lab
Quest Diagnostics San Juan Capistrano
Epic ID
LAB01279
Lab Test Days
Tuesday-Saturday
Standard TAT
3-4 Days
Collection Information
Specimen Required
1.5-5 mL 24-Hour Urine
Container Type
24-Hour Urine Container
Collection Instructions
It is preferred for the patient to be off medications for three days prior to collection. Patient should avoid tobacco, tea, coffee for three days prior to specimen collection. Common antihypertensives (diuretics, ACE inhibitiors, calcium channel blockers, alpha nad beta blockers) cause minimal or no interferance. Medications which are alpha agonists (Aldomet), alpha blockers (Dibenzyline) should be avoided 18-24 hours prior to specimen collection.
Processing Information - Lab Use Only
Transport Temperature
Refrigerate-OK/Frozen-OK/Ambient-OK
Specimen Stability
Room Temp: 7 Days; Refrigerated: 8 Days; Frozen: 30 Days
Test Volume Required
5 mL 24-Hour Urine
Minimum Test Volume
1.5 mL 24-Hour Urine
Processing Instructions
After urine collection, add 25 mL of 6N HCl to maintain a pH below 3. Urine without preservative is acceptable if pH is below 6 and the sample is shipped frozen. Indicate total volume and pH in comments, on specimen and on batch sheet.
Included Tests
Metanephrine, Normetanephrine and Total Metanephrines.
CPT Codes
83835
Revised
07-07-19
Initials
SL