Drucker Diagnostics Paralens Advance - Manual (Page 6)

Section 1
Introduction
1.1 INTENDED USE
The QBC ® Autoread Plus™ System (Figure 1-1)
provides a 9-parameter hematology profile of
centrifuged venous or capillary blood. The QBC
Autoread Plus System provides a diagnostic
hematology profile of the following quantitative
values from a single tube of blood:
• Hematocrit
• Hemoglobin
• Mean Corpuscular Hemoglobin Concentration
• Platelet Count
• White Blood Cell Count
• Granulocyte Count (% and number)
• Lymphocyte-Monocyte Count (% and number)
The Autoread Plus System consists of the Autoread
Plus analyzer with replaceable software cartridge
and interconnecting power pack, a printer, the QBC
Capillary Centrifuge, and various test accessories.
Depending on the software version of the software
cartridge, an analysis of test results is performed
by a computerized reference program; the resulting
printout provides a hematology diagnostic reminder
(HDR report) on abnormal conditions for clinical
follow-up by the physician.*
1.2 SUMMARY OF TEST
The methodology of the QBC test is based on electro-
optical linear measurements of the discrete layers of
packed blood cells in a microhematocrit-type tube
(Figure 1-2). The cell layering results from density
gradients formed during high speed centrifugation
of the blood.
1-6 Nine primary hematology values
including the platelet count are derived. A diagnostic
report on abnormal parameters is provided, based
on computer-stored hematologic data against
which the test values are analyzed.* Tests are
entirely automatic, requiring only that the operator
prepare the sample tube and insert it into the
instrument. Results, including the HDR report, take
approximately 1½ minutes to obtain, depending on
the software version.
*Hematology diagnostic reminder (HDR) program not contained
in all software versions.
PRINTER
CENTRIFUGE
AUTOREAD PLUS ANALYZER
Figure 1-1.
QBC Autoread Plus Hematology System
Figure 1-2.
Cell Layering in Spun Microhematocrit Tube
1-1
PLASMA
PLATELETS
LYMPHOCYTES &
MONOCYTES
GRANULOCYTES
RED CELLS
Plasma
(Sp.Gr. 1.027)
Buffy Coat
Platelets & White Cells
(Sp. Gr. 1.050 – 1.080)
Red Cells
(Sp. Gr. 1.080 – 1.110)