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Test and sample information

This is a searchable database of information about tests offered by Pathology at the Royal Derby Hospital. 

If there are any comments on specific test content please contact john.monaghan@nhs.net .

For further patient information on pathology tests please visit: www.labtestsonline.org.uk

Sample container
Vacutainer / Lavender / EDTA
Volume required
Special requirements for specimen collection
Inform Laboratory and transport immediately on ice to laboratory to allow separation of plasma within 1 hour.
Reference Ranges
Up to and including 4 weeks of age, less than 100 �mol/L.Above 4 weeks of age and adults, less than 50 umol/L
Send directly to the laboratory. Delay can falsely increase ammonia level.
Clinical notes
Elevated levels are found in some inherited metabolic defects, acute hepatic necrosis and advanced portal cirrhosis. It is also elevated in Reye's syndrome. 
Sulfasalazine and Sulfapyridine may cause negative interference with this assay.
Turn around time
Same day (working days)
Last modified: 16/08/2018