Specimen Requirements:
10.0 mL liquid Feces
Collection Instructions:
Submit frozen sample of liquid feces. Keep refrigerated during collection. Liquid stool is the only acceptable specimen for this test.
Minimum Volume:
3.0 mL Feces
Transport & Storage: Temperature/Stability:
7 days Refrigerated
30 days Frozen
*Sample must be shipped frozen to reduce odor during shipping and to minimize the risk of the container rupturing due to gas accumulation
Rejection Criteria:
Specimens in paint cans; formed stool specimens received ambient or refrigerated
Reference Range:
Reference ranges have not been established. However, Fecal Osmotic Gap in mOsm/kg can be calculated using the following equation: Fecal Osmotic Gap = 290 - 2x ([Na] + [K]). A Fecal Osmotic gap of 125 mOsm/kg or greater is indicative of osmotic diarrhea, whereas a result of 50 mOsm/kg or less indicates secretory diarrhea.
Methodology:
Coulometric Titration • Flame Photometric
Clinical Significance:
Electrolytes, stool, is useful in evaluating electrolyte loss in diarrhea and malabsorption states
Custom Panel:
No
PRODUCTION SCHEDULE
Turn Around Time:
2 to 3 days
Days Performed:
Monday, Tuesday, Wednesday, Thursday, Friday
Sites Performed:
Quest - Chantilly
PHL Test Code:
MSOT
EPIC Test Code:
Send Out Test Code:
31595
Included Tests:
Chloride, Feces; Potassium, Feces; Sodium, Feces
CPT Coding:
82438, 84302, 84311