Diarrhea Flashcards
1
Q
ingestion of what causes osmotic diarrhea?
A
sorbitol, mannitol, magnesium, phosphate, sulfate
2
Q
what does diarrhea that began within 6 hours of a meal suggest?
A
staph aureus or bacillus cereus
3
Q
what does diarrhea that began at 8-14 hours of a meal suggest?
A
clostridium perfringens
4
Q
dx: diarrhea with dermatitis herpetiformis
A
Celiac disease
5
Q
dx: diarrhea with erythema nodosum (itchy elbows)
A
IBD
6
Q
osmotic gap in secretory diarrhea vs. osmotic diarrhea
A
secretory: less than 50
osmotic: greater than 100
7
Q
a negative osmotic gap indicates what?
A
ingestion of poorly absorbed multivalent anion such as phosphate or sulfate
8
Q
indicators of surreptitious laxative ingestion (3)
A
- large osmotic gap (magnesium ingestion)
- negative osmotic gap
- low stool osmolarity
9
Q
if diarrhea resolves with fasting, is it secretory or osmotic?
A
osmotic
