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HelpTest Code OB Occult Blood
Methodology
Guaiac
Specimen Type
Stool
Preferred Collection Container
STL-CUPCollection Volume
3 mL
Minimum Collection Volume
0.5 mL
Collection 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.
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
Turn Around Time
1 hour
Lab Department
Microbiology
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
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.
Day(s) and Time(s) Performed
Monday through Friday, 24 hours
STAT Availability
Yes