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Fecal Occult Blood (Hemoccult)
MessagePerformed in UA/Body Fluid
Test Code
OBST TEST
Alias/See Also
Hemoccult
Occult Blood
OBST
OBST Test- (WMC and PCMH test code)
Occult Blood
OBST
OBST Test- (WMC and PCMH test code)
Preferred Specimen
Collect samples from bowel movements over three different days.
• Apply as a THIN SMEAR the stool sample obtained from two different sections of each fecal specimen on each card.
• After last sample is obtained, return slides to caregiver and or laboratory.
If using Hemaprompt cards, do not pull silver tab.
• Apply as a THIN SMEAR the stool sample obtained from two different sections of each fecal specimen on each card.
• After last sample is obtained, return slides to caregiver and or laboratory.
If using Hemaprompt cards, do not pull silver tab.
Instructions
7 days before and during the stool collection period
• Avoid non-steroidal anti-inflammatory drugs such as ibuprofen, naproxen or aspirin (more than one adult aspirin per day) 3 days before and during the test period
• Do not eat red meat (no beef, lamb or liver in any form) or take vitamin C in excess of 250 mg/day.
• Avoid non-steroidal anti-inflammatory drugs such as ibuprofen, naproxen or aspirin (more than one adult aspirin per day) 3 days before and during the test period
• Do not eat red meat (no beef, lamb or liver in any form) or take vitamin C in excess of 250 mg/day.
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gastric specimen is submitted on Hemoccult card
Expired card is submitted
Stool has been placed on the incorrect side of guaiac paper
Hematuria or obvious rectal bleeding, i.e. hemorrhoids present
Menstruating female
Expired card is submitted
Stool has been placed on the incorrect side of guaiac paper
Hematuria or obvious rectal bleeding, i.e. hemorrhoids present
Menstruating female
Reference Range
Negative
Clinical Significance
When patient instructions are closely followed, this test is recommended as a diagnostic aid in monitoring:
• Gastrointestinal bleeding in patients with iron deficiency anemia
• Recuperating from surgery, peptic ulcer, ulcerative colitis and other conditions
• Screening for colorectal neoplasia (carcinomas and adenomas).
This is a screening test developed as an aid to diagnosis. It is not intended to replace other diagnostic procedures such as sigmoidoscopy, colonoscopy, barium enema or other x-ray studies.
• Bowel lesions, including some polyps and colorectal cancers, may not bleed or may bleed intermittently.
• When blood is present in the stool, it may not be distributed evenly throughout the specimen.
• Results cannot be considered conclusive evidence of the presence or absence of gastrointestinal bleeding or disease.
• Gastrointestinal bleeding in patients with iron deficiency anemia
• Recuperating from surgery, peptic ulcer, ulcerative colitis and other conditions
• Screening for colorectal neoplasia (carcinomas and adenomas).
This is a screening test developed as an aid to diagnosis. It is not intended to replace other diagnostic procedures such as sigmoidoscopy, colonoscopy, barium enema or other x-ray studies.
• Bowel lesions, including some polyps and colorectal cancers, may not bleed or may bleed intermittently.
• When blood is present in the stool, it may not be distributed evenly throughout the specimen.
• Results cannot be considered conclusive evidence of the presence or absence of gastrointestinal bleeding or disease.
