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Free Catecholamines, Fractionated, 24-hour Urine
|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. Patients should avoid alcohol, coffee, tea, tobacco or strenuous exercise during the period of collection.
|Container type||24 hour urine collection container
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|Amount to Collect||Entire 24 hour urine output|
|Sample type||24 hour urine collection|
|Preferred volume||10 mL urine|
|Min. Volume||5 mL urine|
|Processing notes||pH of the collected urine should be < 3. Record total urine volume on request. Refrigerate aliquot promptly. Order Quest # 4168N.|
|Units||µg/24 hours (mcg/24 hours)|
|Normal range|| Epinephrine
Total Nor + Ep
|Synonyms||Adrenaline; catechols; dopamine; noradrenaline; norepinephrine; epinephrine|
|Turn around times||Test run Monday-Friday. Turnaround time: 2-5 days.|
|Additional information||To convert µg/d to nmol/d (SI units), multiply Epinephrine value by 5.46, Norepinephrine by 5.91, Dopamine by 6.53.
A creatinine level is measured on the same sample of urine; if total creatinine excretion is not within normal limits for patient age and sex and the patient has normal renal function, the urine collection is probably incomplete and the results invalid.
|Last Updated||3/24/2013 7:47:19 PM|