Methodology
High Performance Liquid Chromatography (HPLC); Electrochemical Detection
Synonyms
HVA
Specimen Type
Urine, Timed Collection
Performing Lab
Quest Diagnostics San Juan Capistrano
Epic ID
LAB4218
Lab Test Days
Tuesday and Friday
Standard TAT
3-7Days
Collection Information
Specimen Required
5-10 mL 24 Hour Urine
Container Type
Sterile Container
Collection Instructions
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. Store refrigerated during collection.
Processing Information - Lab Use Only
Transport Temperature
Refrigerate-OK/Frozen-OK/Ambient-OK
Specimen Stability
Room Temp=10 Days; Refrigerated=14 Days; Frozen=90 Days
Rejection Criteria
Preserved urine received refrigerated with pH >3; Unpreserved urine received frozen with pH >6
Test Volume Required
10 mL 24 Hour Urine
Minimum Test Volume
5 mL 24 Hour Urine
Processing Instructions
pH adjusted to <3.0 using 6N HCI. 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.
CPT Codes
82570, 83150
Revised
11-16-20
Initials
SL