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Rifampin, Blood (Referred Out) - Saskatoon

Discipline

Microbiology

Overview

Description

Ordering recommendation

  • Please provide drug dose information, frequency, method and date and time of last dose prior to draw on the  National Jewish Pharmacokinetics requisition.

  • If the exact time of dose and blood draw are not accurately recorded, accurate interpretation cannot be provided by the reference laboratory.

Test ordering requirements

Preferred specimen collection

  • Send patient to a PSC or to Hospital Test Centre for collection, if unable to process within the required time frame.

Forms required

  •  National Jewish Pharmacokinetics requisition

  • Fully complete Pharmacokinetics requisition, including drug dose amount, frequency, method, and date and time of last dose prior to draw (available on National Jewish website)

Specimen Information

Specimen types accepted

  • Serum

Specimen collection container

  • Preferred collection container: Red (non-gel)
  • Alternative collection container: Lithium heparin (dark green, non-gel); not preferred

Collection procedure

  • Aliquot and freeze serum as soon as possible after collection or within 6 hours

Required volume

  • Optimal volume: Two 4.0 mL full collection tubes
  • Minimum volume: 2 mL serum
    • (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: 0.5 mL serum or plasma

Transport and stability

  • Stable for up to 6 hours at room temperature
  • Ship frozen on dry ice

Rejection criteria

Performance

Days/times performed

Availability

  • Shipped as received

Testing site

  • Referred out by St. Paul’s Hospital Laboratory to National Jewish Health Center

 

Maximum laboratory time

Results reporting

  • Within 10 days by testing laboratory

Last Updated: January 9, 2026