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Test Code OBM Occult Blood, Feces Multiple

Specimen Type

STOOL

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.

Collection Volume

1 mL

Minimum Collection Volume

1 mL

Rejection Criteria

Stool that has been frozen

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 Triple Specimens testing in laboratory.

EPIC Code

LAB3035

Methodology

Guaiac

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.

Turn Around Time

1 hour

Lab Department

Microbiology