Tests
Main Content
Ammonia
| Test Name: | Ammonia | ||
| Epic Order Code: | LAB47 | ||
| CPT Code: | 82140 | ||
| Specimen(s) Type: | Plasma | ||
| Acceptable Container(s): |  Top is purple (lavender) | ||
| Testing Schedule: | 24 hrs/day, 7 days/week | ||
| Turn Around Time: | STAT: 1 hour | ||
| Routine: 2 hours | |||
| Collection Information: | No special patient preparation is required. Obtain by standard collection procedures. Fill tube completely and keep tightly stoppered. Place on ice immediately. | ||
| Transport Information: | Deliver to lab immediately on ice. All specimens must be signed into the laboratory. | ||
| Reference Clients: | If unable to deliver to the lab within 20 minutes, centrifuge the specimen and remove plasma from the red cells. Keep container tightly capped. Store and transport at -20° C. Specimen must be received in the lab within 24 hours. | ||
| Causes for Rejection: | Improperly labeled, incorrect container, contaminated, insufficient quantity, incorrect/delay in transport. | ||
| Reference Range: | Males: | 16-60 µmol/L | |
| Females: | 11-51 µmol/L | ||
| Additional Information: | One known source of spontaneous ammonia formation is an increased gamma-glutamyl transferase activity leading to decomposition of glutamine. | ||