Last Modified:
1/11/2019 10:36:55 AM
Specimen Requirements:
10.0 mL Liquid Stool
Collection Instructions:
Submit frozen samples of liquid stool. Keep refrigerated during collection. Liquid stool is the only acceptable specimen for this test. 10 mL aliquot of 24 hr, 48 hr, or 72 hr liquid stool specimens are acceptable.
Minimum Volume:
3.0 mL Liquid Stool
Transport & Storage: Temperature/Stability:
7 days Refrigerated
30 days Frozen (preferred)
Note: 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:
Paint cans • Formed stool • Specimen received Ambient • Specimen received 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:
Flame Photometric
Clinical Significance:
Sodium, stool, is useful in evaluating electrolyte loss in diarrhea and malabsorption states.
Custom Panel:
No
PRODUCTION SCHEDULE
Turn Around Time:
next day
Days Performed:
Monday, Tuesday, Wednesday, Thursday, Friday
Sites Performed:
Quest - Chantilly
PHL Test Code:
MSOT
EPIC Test Code:
Send Out Test Code:
8833
Alternate Test Names:
Sodium, Stool
CPT Coding:
84302
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