Synonyms
NH3; NH4
Specimen Type
Plasma
Performing Lab
RCHSD Chemistry
Epic ID
LAB47
Lab Test Days
As received
Standard TAT
1 Hour
Stat TAT
1 Hour
Collection Information
Specimen Required
0.6-1 mL Blood
Container Type
Light Green (Lithium Heparin PST)
Collection Instructions
Plasma collected in an EDTA (lavender-top) tube is also acceptable. Place tube on ice immediately after collection. Satellite locations must send patient to RCHSD for draw. If physician requests "Free-Flowing" draw without tourniquet.
Processing Information - Lab Use Only
Transport Temperature
On Ice
Specimen Stability
Room Temp=8 Hours; Refrigerated=14 Days; Frozen=1 Month
Rejection Criteria
Serum; Hemolysis
Test Volume Required
0.5 mL Plasma
Minimum Test Volume
0.3 mL plasma
Processing Instructions
Centrifuge and separate plasma within 15 minutes of collection. Deliver directly to Chemistry.
CPT Codes
82140
Revised
07-07-21
Initials
DM
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