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UW Health SMPH
American Family Children's Hospital

UW Hospital and Clinics Lab Test Directory

Test Name: Occult Blood (Immunoassay), Diagnostic, Stool

Test Code(s): IFOBD / IFOBTM

CPT Code(s): 82274

Methodology: Immunoassay

Days Performed: Daily, 24 hours.

Turnaround Time: Routine: 4 hours.

Specimen Requirements

Specimen: Stool

Collection Instructions: Unscrew the top of the sample collection tube and remove the sample probe.  Scrape the surface of the fecal sample with the sample probe.  Cover the grooved portion of the sample probe completely with the stool sample.  Replace the sample probe in the tube and tighten securely.

Collection Container: Preferred: Polymedco iFOB Complete Collection Tube

Sample Analyzed: Stool

Specimen Transport: Transport specimen to UWHC Core Laboratory (B4/220).

Unacceptable Criteria: Stool sample not received in Polymedco OC iFOB collection tube is not acceptable.
LIMIT: One specimen every 7 days.

Stability: Ambient: 15 days after sample placed in tube
Refrigerated: 1 months after sample placed in tube


Interpretive Guidelines:

Negative:   Less than 50 ng/mL human hemoglobin

Positive:  Greater than or equal to 50 ng/mL human hemoglobin

Test Limitations:

Patients with urinary, menstrual, constipation or hemorrhoid bleeding should not be considered for this test. These patients may be considered for this test once such bleeding ceases.

As with any occult blood test, results obtained with the OC Light iFOBT should not be considered conclusive evidence of the presence or absence of G.I. bleeding or pathology. OC Light iFOBT is designed for preliminary screening. It is not intended to replace other diagnostic procedures such as colonoscopy or sigmoidoscopy in combination with double contrast barium x-ray.

Urine and excessive dilution of samples with water from the toilet bowl may cause erroneous test results. For best results, use the collection paper in the collection kit.

OC Light iFOBT is not for use in testing urine, gastric specimens or other body fluids.


Hemoccult FIT Fecal Immunochemical Test

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