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HelpTest Code OB Occult Blood
Specimen Type
Stool
Preferred Collection Container
STL-CUPCollection Instructions
Specimens must be properly labelled with the patient’s name, hospital identification number, time and date of collection, and initials of person collecting specimen.
Collection Volume
3 mL
Minimum Collection Volume
0.5 mL
Rejection Criteria
Specimen contaminated with urine; Specimen other than stool; Improper container; Specimen on outside of container; Unlabeled specimen; Incomplete requisition; Stool that has been frozen
Specimen Storage and Stability
Room Temperature for up to 14 days
Day(s) and Time(s) Performed
Monday through Friday, 24 hours
Alias
Occult Blood; Blood, Occult, Stool; HemOccult, Stool; Hematest, Stool; Occult Blood, Stool;
Ordering Info
This test is used for Single Specimens testing in laboratory.
EPIC Code
LAB694
Methodology
Guaiac
Acceptable Collection Container
Plastic container with lid; or HemOccult test card
Patient Preparation
A high bulk, red meat-free diet has been recommended for 72 hours prior to collection.
3 days prior to Occult blood collection, patient should not receive >250 mg of vitamin C (ascorbic acid). This can cause false-negatives.
For 7 days prior to Occult blood collection, patient should avoid nonsteroidal anti-inflammatory drugs, including more than one aspirin a day. This can cause false-positives. Other interfering substances that can cause false-positives are: alcohol in excess, corticosteroids, anticoagulants, antimetabolites, cancer chemotheraputic drugs, application of antiseptic preparations containing iodine.
STAT Availability
Yes
Turn Around Time
1 hour
Lab Department
Microbiology