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Interpretive Handbook

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Test 8633:
Heavy Metals Screen, 24 Hour, Urine

Clinical Information Discusses physiology, pathophysiology, and general clinical aspects, as they relate to a laboratory test

See individual test descriptions for:

-ASHMS/8644 Arsenic, 24 Hour, Urine

-CDHMU/8678 Cadmium, 24 Hour, Urine

-PBS/8600 Lead, 24 Hour, Urine

-HGHMS/8592 Mercury, 24 Hour, Urine

Cautions Discusses conditions that may cause diagnostic confusion, including improper specimen collection and handling, inappropriate test selection, and interfering substances

High concentrations of gadolinium and iodine are known to interfere with most metals tests. If either gadolinium- or iodine-containing contrast media has been administered, a specimen should not be collected for 96 hours.

Reference Values Describes reference intervals and additional information for interpretation of test results. May include intervals based on age and sex when appropriate. Intervals are Mayo-derived, unless otherwise designated. If an interpretive report is provided, the reference value field will state this.

ARSENIC

0-35 mcg/specimen

Reference values apply to all ages.

 

LEAD

0-4 mcg/specimen

Reference values apply to all ages.

 

CADMIUM

0-15 years: not established

> or =16 years: 0.0-1.3 mcg/specimen

 

MERCURY

0-15 years: not established

> or =16 years: 0-9 mcg/specimen

Toxic concentration: >50 mcg/specimen

The concentration at which toxicity is expressed is widely variable between patients. 50 mcg/specimen is the lowest concentration at which toxicity is usually apparent.