Gastric Occult Blood
Test Mnemonic
FGSTRO
CPT Codes
- 82271 - QTY (1)
Aliases
- Gastroccult
Includes
- Gastric Occult Blood
Performing Laboratory
Cleveland Clinic Laboratories
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Fluid, gastric | Clean container | Refrigerated | Deliver to laboratory immediately after collection. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.5 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | Testing should be performed as soon as possible after collection |
| Frozen | Testing should be performed as soon as possible after collection |
| Refrigerated | Testing should be performed as soon as possible after collection |
Days Performed
Sun - Sat
Turnaround Time
24 hours
Methodology
| Name | Description |
|---|---|
| Colorimetry |
Reference Range
Special Info
Patient Preparation: Patient should refrain from antacid administration and stomach irrigation 60 minutes prior to sample collection. Ascorbic acid (vitamin C) may cause false-negative test results for occult blood.