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Pathology and Laboratory Medicine
Test Catalogue

​Urea, Fluid


​Specimen Requirements​

  • ​Peritoneal Effluent
  • Miscellaneous Fluid
​Required Volume
  • ​Optimal Volume: 4.0 mL
  • 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 if cells present
  • 7 days at 2 – 8 ºC
Grounds for Rejection​

Testing Information​ ​

  • ​24 hours a day
Testing Site​
  • ​SPH, RUH
Results Reporting​
  • In hospital reported within 2 hours
  • Community urgent reported within 4 hours
  • Community routine reported within 24 hours
  • ​Kinetic with urease and glutamate dehydrogenase
​Specimen Retention
  • ​3 days
​Alternate Test Names
  • ​BUN
SHR LIS Test Code​
  • ​Peritoneal Fluid - URPTE
  • Miscellaneous Fluid - URFNS (For Laboratory Use Only)


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

Laboratory Controlled Document LSM-256 v3

Last Modified: Wednesday, February 24, 2016 |
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