Potassium, Fecal
Also known as: FE-K
Use
This test measures the concentration of potassium in stool, which can be useful in diagnosing and managing conditions that affect electrolyte balance in the gastrointestinal tract. Monitoring fecal potassium levels can provide insights into various disorders such as chronic diarrhea or malabsorption syndromes. This test aids in assessing the causes of electrolyte imbalances and helps in guiding appropriate treatment strategies.
Special Instructions
A 24-hour or random stool sample is required. The sample should be transferred to an unpreserved stool transport vial using ARUP's Supply and should not be liquefied by adding saline or water. Proper handling and specific transport conditions must be adhered to for accurate results.
Limitations
The reference interval for fecal specimens has not been established, which may limit the interpretive guidance of results. The test is subject to variances related to stool consistency and collection methods, and results should be interpreted within the context of the patient's clinical condition. Analytical performance has been determined by ARUP Laboratories, and the test is intended for clinical use in a CLIA-certified laboratory setting, but it has not been cleared or approved by the FDA.
New York Approved
Methodology
Automated Analyzer (Clinical Chemistry)
Biomarkers
LOINC Codes
- 15202-5
Result Turnaround Time
1-2 days
Related Documents
For more information, please review the documents below
Specimen
Stool
Volume
5 g
Minimum Volume
1 g
Container
Unpreserved stool transport vial (ARUP Supply #40910)
Collection Instructions
Collect a 24-hour or random stool sample. Transfer the sample to an unpreserved stool transport vial without adding saline or water to liquefy the specimen. Ensure the collection is mixed well.
Storage Instructions
Refrigerated transport necessary.
Causes for Rejection
Formed or viscous stool
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 1 hour |
| Refrigerated | 2 weeks |
| Frozen | 6 months |