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Test Code GOCLT or LAB696 Occult Blood, Gastric/Duodenum

Specimen Requirements

Specimen Type:

Gastric

Container Type:

Sterile Container

Optimal Collection Volume:

Entire specimen

Collection Instructions:

  • Specimens are obtained by nasogastric intubation or vomitus.
  • If also testing for gastric pH, send sample immediately to the lab.

Specimen Transport Temperature:

Refrigerated

Processing Instructions:

Deliver sample to urinalysis department.

 

 

 

 

 

 

 

 

 

 

 

 

Specimen Stability

Specimen Type

Temperature

Time

Gastric aspirate

Room Temperature

24 hours

Refrigerated

5 days

Methodology

Alpha guaiaconic acid reacts with hydrogen peroxide in the presence of heme to produce a highly conjugated blue quinone compound.

Reference Ranges

Negative

Day(s) Performed

24/7

Expected TAT

Same day

Performing Laboratory

Bronson Laboratory, Coagulation - Kalamazoo and Battle Creek

Sample Retention Time

7 days

CPT Code

82271

LOINC Code

2334-1