Selenium

Clinical Chemistry

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Description

Selenium is an essential trace element. Symptomatic deficiency is mainly seen in patients on parenteral nutrition and children with inborn errors of metabolism who require very specialised diets. Acute toxicity can occur with selenous acid ingestion e.g. gun-blueing. Chronic selenium toxicity results in garlic breath odour (also seen with other metals e.g. thallium, arsenic). In addition dermatological changes, gastrointestinal upset and neurological problems may occur.

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Indications

Malnutrition with cardiomyopathy, lightening of the hair or alopecia. Routine quarterly monitoring of long term TPN patients. Suspected toxicity.

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Sample Type

Serum, Trace metal tube or SST/Gel, minimum 1mL (500 L separated serum)

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Reference Range

Reference ranges are provided on the report. Alternatively, please contact the laboratory for current ranges.

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Turnaround Time

Within 2 weeks

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Testing Frequency

Weekly

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