Faecal Occult Blood Test (FOBT)

Last updated 20.09.12

 

Index

 

Rationale

-  Detects trace amounts of blood in stool

-  Used in the National Bowel Ca Screening Program

 

Procedure

-  Collect stool sample

-  1 types of test available

-  Guaiac

-  3 separate stool samples

-  Avoid certain foods & meds

-  Immunochemical

-  2 separate stool samples

-  No preparation

 

 

Contraindications

-  During or within 3 days of menstrual period

-  Bleeding haemorrhoids

-  Haematochezia

 

Indications

-  Family Hx of Bowel Ca

-  PR Exam

 

Results

-  Positive = Blood detected

-  Haematochezia, melena

-  Bowel Ca

-  Polyps

-  Haemorrhoids

-  IBD

-  Follow up positives w colonoscopy +/- sigmoidoscopy