Potassium, Fecal

Casandra

Casandra Test Code AR57145Version 1 (DRAFT)

Performing Lab

Lab ARUP LaboratoriesLab Test ID 0020380CPT Code 84999

Also known as: FE-K

Clinical Use

Order Test

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.

Test Details

New York Approved

Methodology

Automated Analyzer (Clinical Chemistry)

Biomarkers

LOINC Codes

Result Codes

15202-5

Result Turnaround Time

1-2 days

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.