Potassium, RBC
Test code
CPT code(s)*
Test resources
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Details
Methodology
Ion Selective Electrode (ISE)
Specimen requirements | |
|---|---|
| Patient preparation | None Specified |
| Preferred specimen(s) | 4 mL whole blood collected in a sodium heparin or lithium heparin (green-top) tube and 4 mL whole blood collected in an EDTA (lavender-top) tube |
| Minimum volume | 1.5 mL |
| Collection instructions | Both samples must only be collected Mon-Thurs and must be received together for testing. Clients: Contact the lab prior to ordering for special logistics arrangements. PSC: Follow Short Stability Protocol |
| Transport container | Sodium heparin or lithium (green-top) tube and EDTA (lavender top) tube |
| Transport temperature | Room temperature |
| Specimen stability | Room temperature: 48 hours Refrigerated: 48 hours Frozen: Unacceptable |
| Reject criteria | Hemolysis |
Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
*The CPT codes provided are based on AMA guidance and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.
This material contains content from LOINC® (http://loinc.org). The LOINC Table, LOINC Table Core are copyright © 1995-2019, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license.
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