Potassium, Total, RBC
Also known as: K RBC
Use
Potassium, Total, RBC is used for estimating tissue stores of potassium and may be useful in certain research settings. It helps in understanding the body's potassium balance and might be relevant for clinical situations requiring knowledge about cell potassium concentrations.
Special Instructions
This test is not performed at ARUP; separate specimens must be submitted when multiple tests are ordered. Specimens for elemental testing should be collected in certified metal-free containers to avoid contamination.
Limitations
Elevated results for elemental testing may be caused by environmental contamination at the time of specimen collection. Unacceptable conditions include tubes containing potassium-based preservatives/anticoagulants, which can interfere with the test results. It is recommended that unexpected elevated results be verified by testing another specimen in a trace metal free container to confirm results.
New York Approved
Methodology
Mass Spectrometry
Biomarkers
LOINC Codes
- 2824-1
Result Turnaround Time
4-7 days
Related Documents
For more information, please review the documents below
Specimen
Whole Blood
Volume
1 mL
Minimum Volume
0.3 mL
Container
Original collection tube
Collection Instructions
Separate from cells ASAP or within 2 hours of collection. Leave RBCs in the original container and replace stopper. Transport in the original collection tube.
Storage Instructions
Refrigerated; ambient and frozen conditions are unacceptable.
Causes for Rejection
Tubes containing potassium-based preservatives/anticoagulants.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | Unacceptable |
| Refrigerated | 1 month |
| Frozen | Unacceptable |
Other tests from different labs that may be relevant