A
5200 Harry Hines Blvd.
,
Dallas
,
TX
75235
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General Information
Alias: Fecal Electrolyes
Performed: Mon-Fri
Turn Around Time: 6-9 days
CPT Codes: 82438, 83735, 84302, 84100, 84999x2
Performed By: Referral Lab
Notes: In the event a formed stool is submitted, the test will not be performed. The report will indicate "A formed stood specimen was submitted for analysis. This test was not performed because it only has clinical value if perfomred on a watery stool specimen."
Clinical Utility: 1. Workup of cases of chronic diarrhea 2. Diagnosis of factitious diarrhea either from sample adulteration with hypotonic fluid, ingestion of supplements with unsuspected laxative properties, or surreptitious laxative abuse.
Link:
Electrolytes, Random, Stool
Unacceptable Conditions: Formed stool
Components
| Name |
Method |
Sex |
Age Range |
Ref. Range Low |
Ref. Range High |
Units |
| Sodium, Feces |
Indirect Ion-Selective Electrode (ISE) Potentiometry
|
|
|
See Link |
See Link |
mmol/L |
| Potassium, Feces |
Indirect Ion-Selective Electrode (ISE) Potentiometry
|
|
|
See Link |
See Link |
mmol/L |
| Chloride, Feces |
Indirect Ion-Selective Electrode (ISE) Potentiometry
|
|
|
See Link |
See Link |
mmol/L |
| Osmolality, Feces |
Freezing Point Depression |
|
|
See Link |
See Link |
mOsm/kg |
| Magnesium, Feces |
Colorimetric Titration |
|
|
See Link |
See Link |
mg/dL |
| Osmotic Gap, Feces |
Calculation |
|
|
See Link |
See Link |
mOsm/kg |
| Phosphorous, Feces |
Photometric, Ammonium Molybdate
|
|
|
See Link |
See Link |
mg/dL |
Specimen Requirements
| Type |
Container |
Volume |
Units |
Collection / Delivery |
Storage / Transport |
Off Campus |
| Stool |
Stool container |
20 g |
|
Collect a very liquid stool specimen. |
Room Temperature |
Transport stool specimens refrigerated. |