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Test Code GOB Gastric Occult Blood

Clinical Indications

N/A

Additional Test Codes

Epic Order Name: Gastric Occult Blood Screen
Sunquest Order Code: GOB
Px Order Code: LAB4068

Specimen Collection Type

A gastric aspirate, obtained by nasogastric intubation, or vomitus are appropriate
samples.

Minimum Collection Volume

1 mL

Reference Range

Negative

Critical Value

N/A

Interpretation

N/A

Rejection Criteria

N/A

Specimen Availability for Add-on Testing

2 Days

Specimen Stability

5 Days Refrigerated

Day(s) Performed

Monday through Sunday

Performing Lab- Department

TUKHS-BH-Chemistry

CPT Code

82271

LOINC Code

2334-1

Test Alias

N/A

Additional Information / Notes

False Positives:
1) Incompletely cooked meat.
2) Raw fruits and vegetables that have peroxidase activity.
False Negatives:
1) Antacids if tested less than 60 minutes after last antacid ingestion.
2) Ascorbic Acid (Vitamin C)