Mercury
Label Mnemonic: HGUR
Epic Lab Code: LAB8531
Downtime Form: A-1a Miscellaneous Request
Commercial Mail-out Laboratory
5231 RCP
356-8593
Specimen(s):
Random Urine
Specimen Instructions:
Patient Prep: Diet, medication, and nutritional supplements may introduce interfering substances. Patients should be encouraged to discontinue nutritional supplements, vitamins, minerals, and non- essential over-the-counter medications (upon the advice of their physician). High concentrations of iodine may interfere with elemental testing. Abstinence from iodine-containing medications or contrast agents for at least 1 month prior to collecting specimens for elemental testing is recommended.
Collection Medium:
Urine (Random)-BD Vacutainer®, no additive yellow top
Minimum:
Preferred Minimum: 8 mL random urine
Absolute Minimum: 1 mL random urine
Rejection Criteria:
Urine collected within 48 hours after administration of a gadolinium (Gd) containing contrast media (may occur with MRI studies). Acid preserved urine.
Turn Around Time:
1-4 days upon receipt at reference laboratory
Reference Range:
Mercury, Urine - per volume: 0.0-1.9 μg/L
Mercury, Urine - ratio to CRT: 0.0-20.0 μg/gCRT
Interpretive Data:
Urinary mercury levels predominantly reflect acute or chronic elemental or inorganic mercury exposure. Urine concentrations in unexposed individuals are typically less than 10 μg/L. 24-hour urine concentrations of 30 to 100 μg/L may be associated with subclinical neuropsychiatric symptoms and tremor while concentrations greater than 100 μg/L can be associated with overt neuropsychiatric disturbances and tremors. Urine mercury levels may be useful in monitoring chelation therapy.
Methodology:
Quantitative Inductively Coupled Plasma-Mass Spectrometry
CPT Code:
83825