Piccolo Xpress Manuel De L'opérateur page 16

The bar code ring attached to the top of the reagent disc contains calibration data for the specific
chemistries in the disc. It also contains the disc identification code, lot number, and expiration date.
The analyzer automatically checks the code and rejects any expired disc. The bar code ring also pro-
tects the optical surfaces of the cuvette from fingerprints and debris, and helps minimize contamination
of the analyzer by capturing small drops of blood that may be on the disc surface.
The sample port, marked by an arrow pointing to a molded circle on the disc's upper surface, provides
access to the sample chamber. When sufficient sample has been loaded into the sample chamber, the
sample fill line forms between two molded arrows on the disc surface.
A sample diluent is sealed in a container inside the center of the disc. At the beginning of the reaction
cycle, the analyzer opens this container and releases the diluent.
The analyzer separates a lithium-heparinized whole blood sample by centrifugation inside the disc.
Plasma and serum samples are unaffected. Precisely measured quantities of sample and diluent are
delivered to the mixing chamber. Centrifugal and capillary forces then deliver the diluted sample to
the cuvettes, where it dissolves the reagent beads and initiates the chemical reactions. Reaction prod-
ucts in the cuvettes are then measured photometrically.
2.6.2 Disc Storage and Handling
CAUTION: Discs are fragile — always handle with care. Do not tap discs on the table or work
bench to empty the sample port. Do not use a disk that has been dropped.
Inspect every reagent disc for damage before use. Never use a damaged disc.
Store each reagent disc as described on its label. This keeps the disc's reagents stable
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until the expiration date printed on the disc's foil pouch and encoded in its bar code ring.
The analyzer automatically rejects any expired disc.
Discs can be used directly from the refrigerator (stored at 2–8 °C) without warming.
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A disc can remain in its sealed pouch at room temperature for a cumulative period of
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48 hours. Longer time at room temperature can cause suppression of chemistries and
disc cancellations.
Do not expose discs - in or out of their foil pouches - to direct sunlight or to temperatures
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above 32 °C (90 °F).
Inspect the unopened foil pouch for tears and punctures. A torn or damaged pouch can
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allow moisture to reach the disc and reduce reagent performance.
Open the disc pouch at the notch on the top right edge of the package.
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Note: You must use the disc within 20 minutes of opening its pouch.
2-8 Setup and Description