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HelpEpic Test Code LAB47 Ammonia
Performing Location(s)
BMC,CRH,LFH,OCH,FTT,FOX
Specimen Type
Plasma
Preferred Container
Green top tube (Sodium or Lithium)
Blood Tube Draw Volume
Min 50% draw volume
Minimum Volume to Submit for Testing
0.5 mL Plasma
- Multiple test can be performed from this volume. For question please contact the lab at 547-3975.
Transportation Needs
Keep specimen container capped and transport on ice. If delivery to lab is expected to be delayed greater than 15 minutes, see "Storage Requirements":
Storage Requirements
Normal procedures for collecting and storing plasma may be used for samples to be analyzed by this method. The tube should be completely filled, stored tightly capped on ice, centrifuged immediately and analyzed within 30 minutes.
Instruction for handling specimens for Ammonia at Outreach sites: If delays in analysis are expected, centrifuge specimen in refrigerated centrifuge (if refrigerated centrifuge is not available, pre-chill centrifuge cups or carriers prior to centrifuging specimens). Separate plasma from cells immediately following centrifugation, aliquot and freeze (-15°to -25° C). Specimen will be rejected if not received frozen.
Causes for Rejection
Mislabeled or unlabeled specimen
Less than 50% draw for Vacutainer tubes
> 30 min on ice
> 3 hours refrigerated
> 24 hrs Frozen
Room Temp
Ammonium Heparin Tube
Hemolysis > 50 mg/dL HgB
Lipemia > 1500 mg/dL Trig
Bilirubin > 17.4 mg/dL Bili
Uncapped
Not received into lab within 15 min of collection
NO Add-ons
Reference Values
|
Age |
Reference Range |
Units |
|
≤31 days |
60-100 |
umol/L |
|
31 day-17 years |
20-50 |
umol/L |
|
>17 |
18-72 |
umol/L |
Days of Analysis
All
Available STAT
Yes
Additional Information
Specimen saved for identification only. Cannot be retested for Ammonia after storage times noted above. Can not add on other test.
Methodology
Beckman AU/Dx Series
CPT Code
82140
Last Updated
26-NOV-24 MS