Drucker Diagnostics QBC STAR, Руководство оператора системы

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1 – Introduction
Intended Use
The QBC STAR™ Centrifugal Hematology System provides a diagnostic hematology profile on venous
or capillary blood providing values for:
• Hematocrit
• Hemoglobin
• Mean Corpuscular Hemoglobin Concentration (MCHC)
• Platelet count
• White blood cell count
• Granulocyte count (% and number)
• Lymphocyte/monocyte count (% and number)
Principles of the Test
It has been known for many years that the grayish-white layer (buffy coat) that appears above the red
blood cells in a centrifuged hematocrit tube contains packed layers of leukocytes (white blood cells)
and thrombocytes (platelets)
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. The QBC STAR Centrifugal Hematology System uses technologies that
make it possible to quantify the buffy coat cells.
When the QBC STAR tube is filled with blood and placed into the QBC STAR instrument, the tube is
spun at a high rate of speed causing the different types of cells in the blood to separate into layers or
bands from the most dense to the least dense. The QBC STAR System uses a special tube designed
to enhance the natural separation properties of a whole blood sample when it is centrifuged. A special
coating in the QBC STAR tube stains the two white blood cell populations (granulocytes appear orange-
yellow and lymphocytes/monocytes appear green) and the platelet layer (platelets appear yellow-orange).
The ability to quantify the cells is also enhanced by the insertion of a precision plastic float into the QBC
STAR tube that mechanically expands the buffy coat layers. The hematocrit, white blood cell counts,
and platelet count are directly measured from the cell layers. The float, whose density approximates the
buffy coat cells, will also penetrate the red blood cell layer. The QBC STAR hemoglobin measurement
is directly related to the density of the red blood cells, and is based on the depth of penetration of the
float into the red blood cell layer. Mean Corpuscular Hemoglobin Concentration (MCHC) is electroni-
cally calculated using the standard formula [(HGB / HCT) * 100]
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.
The QBC STAR tube is also internally coated with anticoagulants that allow collection of capillary blood
directly from a skin puncture site.
The QBC STAR System is intended for in vitro diagnostic use.
WARNING
CAREFULLY OBSERVE ALL WARNINGS AND PRECAUTIONS IN THIS
MANUAL AND ON LABELING OF QBC STAR TUBES CONCERNING
THE SAFE HANDLING OF BLOOD AND BLOOD-DERIVED PRODUCTS.
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