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Gastroccult (Occult Blood Gastric/Duodenum)

Container Type = Generic Fluid

Container Type

Test ID LAB696
EPIC Order OCCULT BLOOD GASTRIC/DUODENUM
CPT Code(s) 82271
Group/Individual Test Group
Laboratory Core Laboratory
Tube Station 30
Specimen Routine: Gastric Fluid (obtained by nasogastric intubation or vomitus)
Stability Sterile Specimen Container:
Room Temperature: 24 hrs
2-8°C Refrigerated: 5 days
Frozen: Do Not Freeze
Availability Routine: 24 hrs/day
Turnaround Time 2 hours
Reference Range pH: Undefined
Blood: Negative
Comment

Methodology:  Gastric specimen is applied to guaic-resin treated filter paper followed by buffered hydrogen peroxide developer. Alpha guaiaconic acid reaction with hydrogen peroxide in the presence of any heme groups will produce a blue quinone dye compound indicating the presence of blood/hemoglobin in the gastric specimen. 

Sensitivity:  ≥50 µg hemoglobin/mL gastric fluid

Reviewed by J. Carr on January 15, 2026

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514