Sensa Core ST-200 aQua, Operator'S Manual

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ST-200 aQua
Operator’s Manual
67
To obtain accurate results, samples should be free of any clots, fibrin, etc.,
which would obstruct sample flow and affect results. The use of a serum
clearing agent is strongly recommended.
If a serum separator tube is utilized, care must be taken to avoid inserting
the sample probe into the gel layer. This can create obstructions in the
sample probe and electrodes.
Serum samples offer no advantage over whole blood specimens for stat
analysis but if the sample has to be stored, serum specimens are
preferable.
C. Plasma
1. Collect the specimen by venipuncture into a Sodium-Heparin (green-
topped) evacuated blood collection tube. The heparin level should
not exceed 15 IU per mL of tube volume. Note the time of collection.
2. Mix the specimen by gently inverting the tube. Do not shake.
3. Centrifuge the specimen within one hour of collection. Carefully
remove the top plasma layer for analysis. Use a Pasteur pipette or a
syringe fitted with a blunt-tipped needle for this procedure.
4. Analyze plasma samples within 4 hours of collection. Refrigerated
samples must be brought to room temperature and centrifuged prior
to analysis.
D. Urine
For complete sample preparation and storage information, the user should
refer to the standard clinical chemistry procedures published by NCCLS.
1. Follow standard clinical procedures for collection of random and
24-hour urine specimens.
2. Refrigerate urine specimens until time of analysis.
3. Centrifuge urine specimens to remove cellular matter, crystals etc.
4. Dilute the urine specimen with one part of the supernatant to 5
parts of urine diluent (1:5). Urine must be diluted.
Do not attempt to analyze undiluted urine.