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Pathology and Laboratory Medicine
Test Catalogue



​Ordering Recommendation

  • For trough level tests, collect specimen immediately prior to the next dose ​

Specimen Requirements​ ​

  • ​Plasma
  • ​Preferred Collection Container: Red
​Required Volume
  • ​Optimal Volume: 4.0 mL Full collection tube
  • Minimum Volume: 1.0 mL
    (Submitting the minimum volume makes it impossible to repeat the test or perform confirmatory/reflex testing. In some situations, a minimum volume may require a second collection.)
  • Pediatric Volume
  • ​4 hours on cells
  • 7 days at 2 – 8°C
Grounds for Rejection​

Testing Information​ ​

  • ​24 hours a day
Testing Site​
  • ​RUH, SPH
Results Reporting​
  • In Hospital reported within 2 hours
  • Community Urgent and inter-hospital reported within 4 hours
  • Community Routine reported within 24 hours
  • Critical Results > 2.01 mmol/L will be phoned
  • ​Colorimetric Assay
Specimen Retention
  • ​3 days
SHR LIS Test Code​
  • ​LITH (For Laboratory Use Only)

Patient History ​

​Relevant Recent Medication History
  • ​Note on requisition the dosage, date and time when medication was given


​If you choose to print this information, it is valid only on date of print.

Laboratory Controlled Document LSM-168 v2

Last Modified: Tuesday, February 2, 2016 |
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