Potassium, Plasma - Saskatoon
Discipline
Biochemistry
Specimen Information
Specimen types accepted
- Plasma
Specimen collection container
- Preferred Collection Container: Light green (Lithium Heparin gel)
- Alternative Collection Container: Gold (gel)
Required volume
- Optimal Volume: 4.5 mL Full collection tube
- Minimum Volume: 1 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.)
Transport and stability
- 2 hours on cells
- 14 days at 2 – 8ºC
- If re-centrifuging is required, transfer to aliquot tube prior to centrifugation
Rejection criteria
- Specimens received where the proper collection protocols were not followed
- Pathology and Laboratory Medicine Acceptance and Rejection Criteria
Performance
Methodology
- Ion-Selective Electrode (ISE)
- Rural-potentiometric
Days/times performed
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Maximum laboratory time
Results Reporting
- In Hospital reported within 2 hours
- Community urgent reported within 4 hours
- Community routine reported within 24 hours
- Critical results ≤ 2.5 mmol/L and ≥ 6 mmol/L will be phoned
- Critical results ≤ 2.0 mmol/L and ≥ 6 mmol/L will be phoned (Post Dialysis)
- Critical results ≤ 2.5 mmol/L and ≥ 7.0 mmol/L (Infants < 2 months or capillary)
Specimen retention time
- 3 days
Last Updated: October 9, 2024