AMMONIA

SPECIMEN:1 ML FROZEN PLASMA

TUBE TYPE: LAVENDER-TOP (EDTA) TUBE

MINIMUM VOLUME: 0.5 ML

TRANSPORT: FREEZE; AMMONIA IS STABLE FOR SEVERAL DAYS AT -20°C. CAUTION: BLOOD AMMONIA INCREASES RAPIDLY AT ROOM TEMPERATURE. PATIENT SHOULD BE FASTING 12 TO 14 HOURS TO AVOID LIPEMIA, WHICH INTERFERES WITH THE TEST. DATE AND TIME SPECIMEN WAS DRAWN MUST BE WRITTEN ON TUBE OF BLOOD AND REQUEST FORM. TUBE MUST BE FILLED COMPLETELY AND KEPT TIGHTLY STOPPERED AT ALL TIMES. MIX WELL. SPECIMEN MUST BE PLACED ON ICE IMMEDIATELY. SEPARATE PLASMA FROM CELLS WITHIN 15 MINUTES OF COLLECTION. PATIENT SHOULD  NOT CLENCH FIST. TRANSFER SPECIMEN TO A PLASTIC TRANSPORT TUBE BEFORE FREEZING. AVOID CONTAMINATION OF SAMPLES BY AMMONIA FROM SMOKING OR TRAFFIC IN THE LABORATORY OR PATIENT’S ROOM, GLASSWARE, OR WATER.