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eDH Procedure Code(s)
LAB47
Collection Information
Specimen should be drawn without using a tourniquet into a chilled EDTA tube.
If tourniquet must be used to locate a vein, remove tourniquet and wait at least 15 seconds before Ammonia specimen is obtained.
Specimen should be mixed (4-5 times), placed on ice, and delivered to lab immediately.
Note: heparinized plasma is not acceptable for this assay.
Note: microtainers are acceptable only if drawn from a line.
Note: finger and heel sticks are not acceptable.
Specimen Information
| Specimen Type | Specimen Source | Acceptable Containers | Minimum Test Volume (mL) | |
|---|---|---|---|---|
| Blood | Blood, Venous | LavM-F | 0.6 | |
| Blood | Blood, Venous | Lav4-F | 0.6 | |
Shipping and Handling
Processing Instructions: Specimen must be centrifuged within 15 minutes of collection.Separate plasma and analyze immediately or freeze
Transport Temperature: On Ice
Transport Instructions: N/A
Specimen Stability Unprocessed
Unprocessed: 15 Minutes in EDTA
Specimen Stability Post Processing
Ambient: 15 Minutes
Refrigerate: 2 Hours
Frozen: 3 Weeks
Test Components
| Component | LOINC Code |
|---|---|
| AMMONIA | 16362-6 |
Turnaround Time (TAT)
STAT 1 Hour
Routine 4 Hours
CPT Code(s)
LAB47 Ammonia: 82140
Performing Lab Section
Chemistry
Performing Lab(s)
Alice Peck Day Memorial Hospital Laboratory (APD)
Cheshire Medical Center Laboratory (CHE)
Dartmouth Hitchcock Medical Center Laboratory (MHMH)