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Occult Blood, Fecal rectal bleed
Test Code5672
Alias/See Also
RBC Fecal (Occult Blood, Fecal); Guaiac (Occult Blood, Fecal); Occult Blood, Stool (Occult Blood, Fecal); Fecal Occult Blood (Occult Blood, Fecal)
Preferred Specimen
Stool.
Minimum Volume
5 g aliquot of stool in a clean unpreserved stool transport vial (ARUP Supply #40910), frozen. (Min: 1 g)
Instructions
For seven days before collection and during collection the following items should be avoided, non-steroidal anti-inflammatory drugs such as ibuprofen, naproxen, or aspirin (if ingesting more than one adult aspirin per day). Acetaminophen (Tylenol) can be taken. For three days before collection and during collection the following items should be avoided, vitamin C supplements in excess of 250 mg a day, citrus juices, citrus fruits, and red meats.
Transport Temperature
5 g aliquot of stool in a clean unpreserved stool transport vial (ARUP Supply #40910), frozen. (Min: 1 g)
Specimen Stability
Ambient: 1 hour; Refrigerated: 36 hours; Frozen: 3 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Stool in preservatives.
Methodology
Qualitative Colorimetry
Setup Schedule
Sun-Sat
Report Available
Within 24 hours
Limitations
Gastric specimens: Refer to test Occult Blood, Gastric, (0060310).
Clinical Significance
Rectal bleed
