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Fecalysis or Stool Analysis
Transcript of Fecalysis or Stool Analysis
Fecalysis or Stool Analysis
- refers to a series of laboratory tests done on fecal samples to analyze the condition of a person's digestive tract in general.
FECALYSIS or STOOL ANALYSIS
Patients receiving tetracyclines, anti diarrheal drugs, barium, bismuth, oil, iron, or magnesium may not yield accurate results
Normal values in stool analysis
This is performed to check for presence of any reducing substances such as white blood cells (WBCs), sugars, or bile and signs of poor absorption as well as screen for colon cancer
Amount: 100-200 g/day
Odor: varies with pH of stool and depend on bacterial fermentation
Consistency: plastic, not unusual to see fiber, vegetable skins
Size and shaped: formed
Gross blood, mucous, pus parasites - none
Fat - colorless, (18%) and fatty acid
Leukocyctes - none
Parasites - none
Water - up to 75%
pH: 6.5 - 7.5
Occult blood - negative
Urobilinogen: 50 - 300 ug/24hr
Coporphyrins: 400 - 1200 ug/24hr
Uroporphyrins: 10 - 40 mg/24hr
Nitrogen: < 2.5 g/24hr
Normal value varies with pH of stool and diet
Indole and sketole are the substances that produce normal odor formed by intestinal bacteria putrefaction and fermentation
1. Foul odor is caused by degradation of undigested protein
2. Foul odor is produced by excessive carbohydrate ingestion
3. A sickly sweet odor is produced by volatile fatty acids and undigested lactose
Normal value: neutral to acid or alkaline
1. Increased pH (alkaline)
- protein break down
- antibiotic use
- villous adenoma
2. Decreased pH (acid)
- carbohydrate malabsorption
- fat malabsorption
- disaccharidase deficiency
Normal Color: Brown
Yellow to yellow green - severe diarrhea
Green - severe diarrhea (bile)
Black - results from bleeding into the upper gastrointestinal tract
Tan or Clay - blockage of common bile duct
Pale greasy acholic - stool found in pancreatic insufficiency
Maroon to red to pink - possible result of bleeding from the lower gastrointestinal tract
Bismuthe found in toilet tissue interferes with the results
Do not collect stool from the toilet bowl. A clean, dry bedpan is the best.
Lifestyle, personal habbits, environments may interfere with proper sample procurement
Fecal Occult Blood Test (FOBT)
can be a sign of a problem in your digestive system, such as a growth, or polyp, or cancer in the colon or rectum
How long could fecal samples last for fecalysis?
a. As long as the sample is kept refrigerated at 35 F, you can bring it in 2-3 weeks without compromising the diagnostic yield
b. As long as the sample is kept refrigerated at 38 F, you can bring it in 2-3 week without compromising the diagnostic yield
c. As long as the sample is kept refrigerated at 40 F
Are animals also being tested with fecalysis?
a. Yes and with the same procedure
b. No, it is not applicable
c. Yes, but with different procedure
What is the normal consistency of feces?
a. watery, unsoft, always
b. watery, soft, bulky, small and dry depending on diet
c. watery, soft, and dry always
The results of stool feces are usually reported back within?
a. 1 to 2 day
b. a week
c. 3 to 4 day
According to the Bristol stood chart, what type is the normal result for feces?
a. Type 3-4 are ideal stools as they are easier to pass
b. Type 1-2 are ideal stools as they are easier to pass
c. Type 6-7 are ideal stools as they are easier to pass