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Test Code IFOB Occult Blood Stool Immunochemical Method

Specimen and Container/Tube

Specimen Type: Stool 

Preferred Specimen: Polymedco OC-Light S specimens collection container with stool specimen

Other Acceptable specimens: sterile container

Specimen Handling and Transport Instructions

UCMC Onsite Instructions: Collect specimen per standard collection procedure and send to laboratory immediately.

 

UCMC Offsite and UC MedLab Outreach Instructions: Collect specimen per standard collection procedure and send to laboratory immediately. Specimens must be received within 10 days of collection. If transport is delayed, specimens may be stored at room temperature.

Rejection Criteria

  • Common specimen rejected situations include: incorrect specimen type, insufficient volume, missing or incomplete specimen identifiers, incorrect specimen transport, or specimens outside stability limits. 
  • Frozen or heated specimens will be rejected
  • Quantity not sufficient specimens are not suitable for testing and will be rejected
  • Grossly blood specimens are not suitable for testing

Reference Values

Analyte

Age

Sex

Reference Range
Occult blood stool All Male and Female Negative 

 

Critical Values

Not applicable 

Turnaround Time

Turnaround times are relative to the time the specimen is received in the test laboratory. 

 

STAT Turnaround Time: Not available STAT

 

Routine Turnaround Time: 24 hours

 

Testing Schedule: 24/7

CPT Codes

82274

LOINC Codes

IFOB1 57803-9

Volume

Preferred Volume: Polymedco OC-Light S specimens collection container with stool specimen

Minimum Volume: 1.0 mL

Specimen Stability

Storage Temperature

Stability

Room temperature

(20 - 25°C)

 14 days

Refrigerated

(2 - 10°C)

 14 days

Frozen

(-20°C)

not acceptable

Collection Instructions

Refer to How to Take the FIT Stool Test at Home instructions. 

 

Patients with the following conditions should note considered for testing as these conditions may interfere with the test results: 

  • Bleeding hemorroids
  • Constipation bleeding
  • Urinary bleeding
  • Menstrual bleeding

Test Components

Hemoccult Immunochemical result, date of collection

Clinical Indications

  • Detection of fecal occult blood in stool

Methodology

Polymedco OC-Light S immunochemical fecal occult blood test (FIT) 

Synonyms/Search Keywords

Hemoccult ICT, FIT 

Additional Information

Potential False Negative: Very high concentrations of blood (visibly bloody stool) may test as negative due to prozone effects.

 

Certain medications such as aspirin and non-steroidal anti-inflammatory drugs may cause gastrointestinal irritation and subsequent bleeding in some patients and cause positive results. 

The Occult Blood Feces, Immunochemical method may detect occult blood when it is the result of lower gastrointestinal tract bleeding, but may fail to detect upper gastrointestinal tract bleeding, producing a negative result. Therefore, the Occult Blood, Feces Guaiac Method (Hemoccult Sensa) is used for suspected upper GI bleeding and Hemoccult ICT is used for suspected lower GI bleeding.

Last Reviewed Date

9/5/2024