This document applies to the latest higher software version.
When a subsequent software version changes the information in this document, a new issue will be
released.
1.1. Notice of liability
The information in this manual is distributed on an ’’as is’’ basis, without warranty. While every
precaution has been taken in the preparation of the manual, ABX DIAGNOSTICS shall have any liability to
any person or entity with respect to liability, loss, or damage caused or alleged to be caused directly or
indirectly by the instructions contained in this manual or by the computer software and hardware
products described herein.
1.2. Trademarks
Other product names mentioned within this publication may be trademarks or registered
trademarks of other companies.
1.3. Copyright ® 2002 by ABX DIAGNOSTICS
All rights reserved. No part of this book may be reproduced or transmitted in any form or by any
means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written
permission of ABX DIAGNOSTIC S.
ABX DI AGNOS TICS
Parc Euromédecine
Rue du caducée
B.P. 7290
34184 MONTPELLIER Cedex 4 - FRANCE
Tel: (33) (0)4 67 14 15 16
Fax: (33) (0)4 67 14 15 17
2/3
2. Working conditions
2.1. Environment
The Pentra 80 should be operated in an indoor location only. Operation at an altitude over 3000
meters (9800 feet) is not recommended. Instrument is designed to be safe for transient voltages
according to INSTALLATION CATEGORY II and POLLUTION DEGREE 2.
Please ask your ABX Diagnostics representative service center for any information about the operating
location when it does not comply with the recommended specifications.
2.2. Location
The Pentra 80 should be placed on a clean and leveled table or work station. Please note that the
Pentra 80, printer and reagents weigh approximately 40 kilograms (88 lbs). Avoid exposure to sunlight.
Proper ventilation requires that a space of at least 20 cm (8 inches) must be left behind the instrument.
2.3. Grounding
INTRODUCTION
Proper grounding is required. Check that the wall ground (earth) plug is correctly connected to the
laboratory grounding electricity installation.
If there is no ground then use a ground stake. Current electricity Standards must be applied.
2.4. Humidity and temperature conditions
The Pentra 80 must function between 16 to 34°C (61 to 93°F). Maximum relative humidity 80% for
temperatures up to 31°C (88°F) decreasing linearly to 50% relative humidity at 40°C (104°F). If it is kept
at a temperature of less than 10°C (50°F), the instrument should be allowed to sit for an hour at the
correct room temperature before use.
2.5. Electromagnetic environment check
The Pentra 80 as been designed to produce less than the required level of electromagnetic
interferences in order to operate in conformity with its destination. The electromagnetic interferences
caused by the Pentra 80 are limited to a level allowing the correct operation of other instruments in
conformity with their destination.
In case of problems, check that the instrument is not placed in proximity of electromagnetic fields,
or short wave emissions (radars, X-rays, scanner, etc...).
2.6. Environment protection
Used accessories and consumables must be collected by a laboratory specialized in elimination
and recycling of this kind of material according to the legislation.
In order for the instrument to operate correctly, hight-quality reagents must be used.
ABX DIAGNOSTICS provides all the necessary reagents.
All these reagents have been registered by the A.F.S.S.A.P.S. «Agence Française de Sécurité Sanitaire des Produits de Santé» according to the procedure relative to laboratory reagents
used for biological analyses.
These reagents are used for in vitro diagnostics.
All these reagents are manufactured by:
ABX DIAGNOSTICS
Rue du caducée - Parc Euromédecine
34184 MONTPELLIER CEDEX - FRANCE
Tel: (33) 4 67 14 15 16 - Fax: (33) 4 67 14 15 17
4.1. ABX DILUENT
• Function: This diluent is necessary for the process involved in counting (and differentiating) the
blood cells. This reagent is used also to rinse the hydraulic parts of the instrument.
• Composition: Stabilized saline solution which contains an organic buffer, an antiseptic and
Sodium Azide < 0.1%.
• Description: Limpid and odourless aqueous solution.
• Physico-chemicalproperties: Boiling point: About 100°C, pH: neutral.
• Mesuring Principles: See user manual.
• Performances: See user manual.
• Results: See user manual.
• Directions for use: See user manual.
• Handling Precautions: Avoid skin and eye contact. Use laboratory gloves when handling the
reagents. If a large quantity of reagent is ingested a mucous irritation can result.
• Emergency First aid: If the eyes or skin come into contact with the reagent, rinse thoroughly with
water. If a large quantity is ingested, drink water immediately, and induce vomiting.
• Storageconditions: Stored at 18°C (65°F) to 25°C (77°F) away from light.
• ABX DIAGNOSTICS Part number: 0901020
4.2. ABX ALPHALYSE
• Function: This reagent is used to lyse blood cells and determine hemoglobin concentration.
• Composition:The reagent contains potassium cyanide at 0.03%, a quarternary ammonium salt
and a saline phosphate buffer containing sodium azide < 0.1%.
• Description: Aqueous solution, limpid.
• Physico-chemical properties: Boiling point: approximately 100°C. pH: basic, smells of cyanide.
• Mesuring Principles: See user manual.
• Performances: See user manual.
• Results: See user manual.
• Directions for use: See user manual.
• Handling Precautions: May be dangerous. Avoid contact with eyes, skin and clothing. Wear
laboratory gloves when handling the product. The product may be harmful if ingested. The product
can be absorbed through an open wound, or inhalation.
• Emergency First aid: If the eyes or skin come into contact with the reagent, rinse with water. If
the reagent is inhaled, breathe fresh air immediately. If a large quantity is ingested, drink water
immediately, and induce vomiting. Call anti-poison center, or contact doctor.
• Storage conditions: Stored at 18°C (65°F) to 25°C (77°F) away from light. Product will degrade if
exposed to air, keep cap / probe assembly securely tightened.
• ABX DIAGNOSTICS Partnumber: 0906004
4.3. ABX BIOLYSE
• Function: This reagent is used to lyse blood cells and determine hemoglobin concentration.
• Composition:Quarternary ammonium chloride.
6/10
SECTION 1SPECIFICATIONS
• Description: Colorless, odorless.
• Physico-chemical properties: pH: 6.65
• Handling Precautions: May be dangerous. Avoid contact with eyes, skin and clothing. Wear
laboratory gloves when handling the product. The product may be harmful if ingested.
• Mesuring Principles: See user manual.
• Performances: See user manual.
• Results: See user manual.
• Directions for use: See user manual.
• Emergency First aid: If the eyes or skin come into contact with the reagent, rinse with water. If
the product is ingested, call immediately a doctor.
• Storage conditions: Stored at 18°C (65°F) to 25°C (77°F) away from light..
• ABX DIAGNOSTICS Part number: 0906005
4.4. ABX CLEANER
• Function: Washing agent.
• Composition: Enzymatic solution with proteolytic action.
• Description: Transparent liquid.
• Physico-chemical properties: Boiling point: around 100°C. pH: 9.6
• HandlingPrecautions: May be harmful. Avoid contact with eyes, skin and clothing.
• Mesuring Principles: See user manual.
• Performances: See user manual.
• Results: See user manual.
• Directions for use: See user manual.
• Emergency First Aid: In case the product comes into contact with the eyes, rinse with water. If
the product is ingested, call a doctor immediately.
• Storage conditions: Stored at 18°C (65°F) to 25°C (77°F).
• ABX DIAGNOSTICS Partnumber: 0903010
4.5. ABX EOSINOFIX
• Function: This reagent lyses RBCs, fixes leukocytes and gives a specific coloration to
• Description: Deep blue aqueous solution, smells of alcohol.
• Physico-chemical properties: pH: 6.9
• Handling precautions: Avoid contact with eyes, skin and clothing. Wear laboratory gloves when
handling the product. The product may be harmful if ingested or inhalted. Keep the bottle closed
when not in use.
• Mesuring Principles: See user manual.
• Performances: See user manual.
• Results: See user manual.
• Directions for use: See user manual.
• Emergency First Aid: If the eyes or skin come into contact with the reagent, rinse with water. If
the reagent is inhaled or ingested, call local anti-poison center or contact doctor.
• Storage conditions: Room temperature between 18°C (65°F) to 25°C (77°F).
• ABX DIAGNOSTICSPart number: 0206010
4.6. ABX BASOLYSE II
• Function: This reagent lyses RBCs for the leukocytes and differential count of the polynuclear
basophils.
• Composition: Acidic solution containing a lytic agent.
• Description: Colorless aqueous solution.
• Physico-chemical properties: pH: 2.4
• Handling precautions: Avoid contact with eyes, skin and clothing. Wear laboratory gloves when
handling the product. The product may be harmful if ingested or inhalated. Keep the bottle closed
when not in use.
7/10
PENTRA 80 TECHNICAL MANUALRAA022AA
• Mesuring Principles: See user manual.
• Performances: See user manual.
• Results: See user manual.
• Directions for use: See user manual.
• Emergency First Aid: If the eyes or skin come into contact with the reagent, rinse with water. If
the reagent is inhaled, breath fresh air immediately. If a large quantity is ingested, drink water
immediately. Do not induce vomiting. Call local anti-poison center or contact doctor.
• Storage conditions: Room temperature between 18°C (65°F) to 25°C (77°F).
• ABX DIAGNOSTICS Part number: 0906003
4.7. Waste handling precautions
If required, waste can be neutralized before being discarded. Follow your laboratory’s protocol
when neutralizing and disposing of waste.
5. Limitations
5.1. Maintenance
In Chapter 8. Maintenance, specific maintenance procedures are listed. The maintenance
procedures identified are mandatory for proper use and operation of the ABX PENTRA 80.
Failure to execute any of these recommended procedures may result in poor reliability of the
system.
5.2. Blood specimens
Verification of any abnormal test result (including flagged results or results outside of the normal
range) should be performed using reference methods or other standard laboratory procedures for
conclusive verification of the results. The sections below list known limitations of automated blood cell
counters which use the principles of impedance and light absorbance as principles of measurement.
5.3. Known interfering substances
WBC:
• White Blood Cells (Leukocytes):WBC results that exceed the linearity limits of the system will
require dilution of the blood sample (Leukemia sample followed by a leukopenia). Re-assaying the
diluted sample will help to obtain the correct assay value.
• Unlysed Red Cells - In some rare instances, the erythrocytes in the blood sample may not be
completely lysed. These non-lysed red blood cells may be detected on the WBC histogram with an
L1 alarm or as an elevated baseline on the side (leading edge) of the lymphocytes population. Non-
lysed erythrocytes will cause a falsely elevated WBC count.
• Multiple myeloma - The precipitation of proteins in multiple myeloma patients may give high
WBC counts.
• Leukemia - A very low WBC count may result from this disease because of possible increased
fragility of the leukocytes leading to destruction of some of these cells during counting. These white
cell fragments will also interfere with the white cell differential parameters.
• Chemotherapy - Cytotoxic and immunosuppressive drugs may increase the fragility of the
leukocytes which may cause low WBC counts.
• Cryoglobulins - Increased levels of cryoglobulin that may be associated with myeloma,
etc, which can increase the WBC, RBC or Plt counts and the Hgb concentration. The specimen
must be warmed up to 37°C (99°F) in a bain marie for 30 minutes and analyzed again immediately
after (analyzer or manual method).
• Macrothrombocytes - in excessive numbers may affect and increase Leukocyte numeration.
8/10
SECTION 1SPECIFICATIONS
RBC:
• Red Blood Cells (Erythrocytes): The red blood cell dilution contains all the formed elements in
the blood: erythrocytes, leukocytes and platelets. During erythrocytes counting (red blood cells),
platelets are not counted as their size falls below the minimum threshold.
• Agglutinated erythrocytes - May cause a low incorrect RBC count. Blood samples containing
the agglutinated red blood cells may be suspected by elevated MCH and MCHC values and shown
by examination of the stained blood film.
• Cold agglutinins - IgM immunoglobulins which are high in cold agglutinin disease may cause
lower RBC and Plt counts and increase MCV.
Hgb (Hemoglobin):
• Turbidity of the blood sample - Any number of physiological and/or therapeutic factors may
produce high incorrect Hgb results. To obtain accurate hemoglobin results when increased turbidity
of the blood sample occurs, determine the cause of the turbidity and follow the appropriate method
below:
• High WBC: An extremely high WBC will cause excessive light scatter. In these cases use
reference (manual) methods.The diluted sample should be centrifuged, and the supernatant fluid
measured with a spectrophotometer.
• High lipid concentration: A high concentration of lipids in the blood sample will give the plasma
a «milky» appearance. This condition can occur with hyperlipidemia, hyperproteinemia (as in
gammapathies) and hyperbilirubinemia. Accurate hemoglobin determinations can be achieved by
using reference (manual) methods and a plasma blank.
• Increased turbidity may also be seen in cases where the red blood cells are resistant to lysing.
This condition will cause an incorrect high Hgb result, but may be detected by observing the
abnormal MCH, MCHC values, and the increased baseline on the leading edge of the WBC
histogram. Erroneous hemoglobin results will cause the results of the MCH and MCHC to be
incorrect as well.
• Fetal bloods - The mixing of fetal and maternal bloods may produce a high inaccurate Hgb value.
Hct (Hematocrit):
• Red blood cells agglutination - May produce an inaccurate Hct and MCV values. Red blood cell
agglutination may be detected by observing abnormal MCH and MCHC values, as well as by
examination of the stained blood film In such cases, manual methods may be required to obtain an
accurate Hct value
MCV (Mean Corpuscular Volume):
• Red blood cell agglutination - May produce an inaccurate MCV value. Red blood cell
agglutination may be detected by observing abnormal MCH and MCHC values, as well as by
examination of the stained blood film. In such cases, manual methods may be required to obtain an
accurate MCV value.
• Excessive numbers of large platelets and/or the presence of an excessively high WBC count
may interfere with the accurate determination of the MCV value. In such cases, careful examination
of the stained blood film may reveal the error.
MCH (Mean Corpuscular Hemoglobin):
• The MCH is determined according to Hgb value and the RBC count. The limitations listed for the
Hgb and RBC will have an effect on the MCH and may cause inaccurate values.
MCHC (Mean Corpuscular Hemoglobin Concentration):
• The MCHC is determined according to the Hgb and Hct values. The limitations listed for the Hgb
and Hct will have an effect on the MCHC and may cause inaccurate values.
RDW (Red blood cell Distribution Width):
• The red blood cell distribution width is determined according to the RBC count.
• Nutritional deficiency or blood transfusion - May cause high RDW results due to iron and/or
cobalamin and /or folate deficiency.
Plt (Platelets):
• Very small erythrocytes (microcytes), erythrocyte fragments (schizocytes) and WBC fragments
may interfere with the proper counting of platelets and cause elevated Plt counts.
• Agglutinated erythrocytes - May trap platelets, causing an erroneously low platelet count. The
presence of agglutinated erythrocytes may be detected by observation of abnormal MCH and
MCHC values and by careful examination of the stained blood film.
• Giant platelets in excessive numbers - may cause a low inaccurate platelet count as these large
9/10
PENTRA 80 TECHNICAL MANUALRAA022AA
platelets may exceed the upper threshold for the platelet parameter and are not counted.
• Chemotherapy - Cytotoxic and immunosuppressive drugs may increase the fragility of these
cells which may cause low Plt counts. Reference (manual) methods may be necessary to obtain an
accurate platelet count.
• Hemolysis - Hemolysed specimens contain red cell stroma which may increase platelet counts.
• A.C.D. blood - Blood anticoagulated with acid-citrate-dextrose may contain clumped platelet
which could decrease the platelet count.
• Platelet agglutination - Clumped platelets may cause a decreased platelet count and/or a high
WBC count. The specimen should be recollected in sodium citrate anticoagulant to ensure the
anticoagulated character depending on agglutination and reanalyzed only for the platelet count.
The final Plt result must be corrected for the sodium citrate dilution effect. However, these platelet
clumps do trigger flags L1, LL and LL1.
MPV (Mean Platelet Volume):
• Giant platelets that exceed the upper threshold of the Platelet parameter may not be counted as
platelets. Consequently, these larger platelets will not be included in the instrument’s calculation of
Mean Platelet Volume.
• Very small erythrocytes (microcytes), erythrocytic fragments (Schizocytes) and white blood cell
fragments may interfere with the proper counting and sizing of Platelets.
• Agglutinated erythrocytes - May trap Platelets, causing an incorrect MPV result. The presence
of agglutinated erythrocytes may be detected by observation of abnormal MCH and MCHC values
and by careful examination of the stained blood film.
• Chemotherapy - May also affect the sizing of Plts.
Blood samples collected in EDTA will not maintain a stable Mean Platelet Volume. Platelets
collected in EDTA swell depending on the time post-collection and storage temperature.
• Distribution of the 42.5µl of first dilution into a
flux of 2.20ml of diluent.
• Distribution of 0.3ml of diluent from the interior
of the needle.
Dilution
Initial Blood Volume: 10 µl
Reagent Volume (RBC chamber): 2500 µl
Final Dilution Rate: 1/10000
Hgb:
• Distribution of 0.36ml of ABX ALPHALYSE into
DIL1 chamber while bubbling.
• WBC\BASO chamber rinsing:
• Draining and filling with 1ml of ABX CLEANER
and 1.5ml of diluent
• RBC\Plt counting and Hgb measurement
• Chambers cleaning and Hgb blank
• Draining and filling of DIL1 chamber with 2.7ml
of diluent
• Measurement of Hgb blank
• Flowcell rinsing (about 1.6ml of diluent)
• Draining and filling of RBC chamber with 2.5ml
of diluent
3/11
PENTRA 80 TECHNICAL MANUALRAA022AA
2. Measuring principles
2.1. Multi distribution sytem (MDSS)
2.1.1. CBC mode
In CBC mode, 30µl of whole blood is
aspirated then delivered with reagents into
chambers as follows:
one specimen for the first RBC/Plt dilution
and the Hgb measurement.
another specimen for the BASO/WBC count.
Diag.1:Specimen distribution in CBC mode
2.1.2. Diff Mode
In DIFF mode, 53µl of whole blood is
aspirated, then delivered with reagents into
chambers as follows:
one specimen for the first RBC/Plt dilution
and the Hgb measurement.
another specimen for the BASO/WBC count.
the last specimen for the LMNE matrix.
2.1.3. Specimen distribution
Specimen distribution in the chambers is
carried out in a tangential flow of reagent which
allows perfect mixing of the dilution and avoids
any viscosity problems (this multi distribution in
a reagent flow is an ABX DIAGNOSTICS patent).
Diag.2:Specimen distribution in DIFF mode
4/11
Diag.3:Blood distribution in a tangential flow
SECTION 4ANALYSIS CYCLE TECHNOLOGY
2.2. CBC detection principles
2.2.1. RBC/Plt
Measurement of impedance variation
generated by the passage of cells through a
calibrated micro aperture.
The specimen is diluted in an electrolytic
diluent (current conductor) and pulled through
the calibrated micro-aperture. Two electrodes
are placed on either side of the aperture.
Electric current passes through the electrodes
continuously.
When the cell passes through the aperture,
electric resistance between the two electrodes
increases proportionately with the cell volume.
The generated impulses have a very low
voltage, which the amplification circuit
increases, so that the electronic system can
analyze them and eliminate the background
noise.
Diag.4:Impedance Principles
Results
Number of cells counted per volume unit x
calibration coefficient
Histograms
RBC: Distribution curves on 256 counting
channels from 30fl to 300fl.
Plt: Distribution curves on 256 channels from
2fl to a mobile threshold. This threshold moves
according to the microcyte population present
in the analysis area.
Diag.5:RBC distribution curve
Diag.6:Plt Distribution curve
Dilutions
Table 1: RBC\Plt dilutions
Technical characteristics of the RED BLOOD CELL and PLATELET counts
Initial blood volume10 µlMethodImpedance
Vol . ABX DILU ENT2500 µlAperture diameter50 µm
5/11
PENTRA 80 TECHNICAL MANUALRAA022AA
Table 1: RBC\Plt dilutions
Technical characteristics of the RED BLOOD CELL and PLATELET counts
Final dilution rate**1/10000 Count vacuum200 mb
Temperature of reaction35°CCount period2 X 6 seconds
**: Two successive dilutions are carried out : Primary Dilution for RBC and Plt:
Blood (µl)10 µl
Vol . ABX DILUENT1700 dilution1/170
Secondary Dilution RBC and Plt (from the primary dilution)
Dilution (µl)42,5 µl
Vol . ABX DILUENT2500dilution1/58,8
Final dilution: 1/170 x 1/58,8 = 1/10000
2.2.2. Hgb Measurement
The hemoglobin released by the lysis of the red blood cells combines with the potassium cyanide to
form the chromogenous cyanmethemoglobin compound. This compound is then measured through
the optical part of the first dilution chamber using a spectrophotometric technique at a wavelength of
550 nm.
Table 2: Hgb measurement
Technical characteristics for the HGB MEASUREMENT
Blood volume10 µlMethodPhotometry
Vol . ABX DILUENT1700 µlWavelength550 nm
Vol. ABX ALPHALYSE400 µl
complement ABX DILUENT400 µl
Final dilution rate**1/250
Temperature of reaction35°C
Results
Final Hgb result represents: Absorbance value obtained x coefficient of calibration.
Hct Measurement
The height of the impulse generated by the passage of a cell through the micro-aperture is directly
proportional to the volume of the analyzed RBC.
The hematocrit is measured as a function of the numeric integration of the MCV.
2.2.3. RDW calculation
The study of the RBC distribution detects erythrocyte anomalies linked to anisocytosis.
A Red Cell Distribution Width (RDW) will enable you to follow the evolution of the width of the curve
in relation to the cell number and average volume.
6/11
RDW = (K X SD) / MCV
With:
• K = system constant
• SD = Determined standard deviation according to statistical studies on cell distribution.
• MCV = Mean Corpuscular Volume of erythrocytes
SECTION 4ANALYSIS CYCLE TECHNOLOGY
2.2.4. MCV, MCH, MCHC calculation
• MCV (Mean Cell Volume) is calculated directly from the RBC histogram.
• MCH (Mean Cell Hemoglobin) is calculated from the Hgb value and the RBC number.
• The mean hemoglobin weight in each RBC is given by the formula:
MCH (pg) = Hgb/RBC x 10
• MCHC (Mean Corpuscular Hemoglobin Contained) is calculated according to the Hgb and Hct
values. Mean Hgb concentration in the total volume of RBC is given by the formula:
MCHC (g/dL) = Hgb/Hct x 100
2.2.5. MPV Measurement
The MPV (Mean Platelet Volume) is directly derived from the analysis of the platelet distribution
curve.
2.2.6. Pct Calculation
Thrombocrit is calculated according to the formula:
Pct% = Plt (103/µl) x MPV (µm3) / 10 000
2.2.7. PDW calculation
PDW (Platelet Distribution Width) is
calculated from the Plt histogram.
The PDW is represented by the width
of the curve between 15% of the
number of platelets starting from 2 fl
(S1), and 15% of the number of platelets
beginning with the variable top threshold
(S2).
2.3. WBC and differential count
2.3.1. General principles
Diag.7:PDW calculation
The WBC count is carried out twice by two different sensors:
• In the BASO count chamber at the same time as the BASOS count,
• In the optical chamber during the acquisition of the LMNE matrix.
The reference count
is the one obtained in the WBC and BASO count chamber.
7/11
PENTRA 80 TECHNICAL MANUALRAA022AA
2.3.2. BASO/WBC Count
Detection principle is the same as for RBC.
Differentiation betwen BASOs and other leukocytes is obtained by means of the BASOLYSE II specific
lysing action.
All the WBCs are counted between the electrical
threshold <0> threshold <BA3>. The basophils are
located from threshold <BA2> to threshold
<BA3>.
Diag.8:WBC/BASO histogram
Table 3: WBC\Baso count
Technical characteristics of the WBC/BASO counts
Initial blood volume10 µl (CBC or CBC/DIFF)MethodImpedance
Vol. ABX BASOLYSE II2000 µlAperture diameter80 µm
Final dilution rate**1/200 Count vacuum200 mb
Temperature of reaction35°CCount period2 X 6 seconds
Results
WBC: Number of cells per volume x coefficient of calibration.
BASO: Number of cells per volume x coefficient of calibration in percentage regarding the total
number of leukocytes (BASO + WBC nuclei).
8/11
SECTION 4ANALYSIS CYCLE TECHNOLOGY
2.3.3. LMNE Matrix
The WBC and Differential count are based
on 3 essential principles:
• The double hydrodynamic sleeving
«DHSS» (ABX DIAGNOSTICS patent)
• The volume measurement (impedance
changes).
• The measurement of transmitted light
with 0° angle, which permits a response
according to the internal structure of each
element and its absorbance by means of
incident light diffusion.
25µl of whole blood is delivered to the
LMNE chamber in a flow of EOSINOFIX. This
reagent lyses the RBC, stabilizes the WBC in
their native forms and stains the eosinophil
nuclei with a specific coloration.
The solution is then stabilized with diluent
and transferred to the measuring chamber.
Each cell is measured both in absorbance
(cytochemistry) and resistivity (volume).
Diag.9:DHSS principles
Table 4: WBC counts
Technical characteristics of the WBC counts during the acquisition of the matrix
Initial blood volume25 µl MethodImpedance with hydrofocus
Vol . ABX Eosi nofix1000 µlAperture diameter60 µm
Diluent Volume1000 µlFlow diameter42 µm
Final dilution rate1/80 Injection duration12 s
Temperature of reaction35°CVolume injected 72µl
Incubation duration12s
9/11
PENTRA 80 TECHNICAL MANUALRAA022AA
No cell in the flowcellBaseline
Poorly-stained (agranular)
cell in the flowcell
Hyper segmented with
complex granularity and
staining
Diag.10:Absorbance measurement
Results
From these measurements, a matrix is drawn up with volumes on the X-axis and optical
transmission on the Y-axis. The study of the matrix image permits the clear differentiation of 4 out of 5
leukocyte populations. As a matter of fact, the basophil population is very small compared to the
others.
Low
absorbance
High
absorbance
10/11
MONOCYTES: The monocytes, being cells with large kidney shaped nuclei and a large non-
granular cytoplasm, will neither be scattered nor absorb a large amount of light. They will therefore be
positioned in the lower part of the optical axis but clearly to the right of the volume axis.
LYMPHOCYTES: The lymphocytes being small with regular shape, are positioned in the lower part
of both the optical axis and volume axis. Normal lymphocyte populations are generally observed with a
good volume homogeneity. The far left side of the lymphocyte zone should normally be empty, but
when small lymphocytes are present, population may exist in this area. The presence of platelet
aggregates is detected by a distribution pattern that moves from the origin of the matrix (background
zone) into the lymphocyte zone. The NRBCs with their cytoplasmic membranes lysed like the
erythrocytes, will have their nuclei situated to the far left side of the lymphocyte zone.
SECTION 4ANALYSIS CYCLE TECHNOLOGY
EOSINOPHILS: With reagent action on cytoplasmic membranes, the leukocytes keep their native
size and only eosinophils are colored for optical separation. Eosinophils will be situated in the upper
part of the optical Y-axis due to their strong absorbance qualities and their size, which is nearly
equivalent to large neutrophils.
NEUTROPHILS: The neutrophils, with their cytoplasmic granules and their generally segmented
nuclei, will scatter light depending on their morphological complexity. A hypersegmented neutrophil will
give an increased optical response with respect to a young neutrophil population which will be in the
upper position of the optical axis depending on the presence of segmentation and/or granules.
Additional parameters: LIC (Large Immature Cells) and ALY (Atypical Lymphocytes) complete the
panel available on the matrix.
The immature granulocytic cells are detected by their larger volumes and by the presence of
granules which increase the intensity of the scattered light. Therefore, cells such as metamyelocytes
will be found clearly to the right of the neutrophils and nearly at the same level. Myelocytes and
promyelocytes will be found in saturation position on the far right of the matrix. These last three
populations will be counted as LIC (Large Immature Cells) and their given results are included in the
neutrophil value. The blast cells will be found generally to the right of the monocytes, and, as such, will
increase the LIC count. Small blasts will be found between the normal lymphocytes and monocytes.
Platelets and debris from erythrocyte lysis represent the background noise population located in the
lower left area of the matrix. Most of the population partition thresholds are fixed and give the limits of
the morphological normality of leukocytes. Changes in the morphology of a population will be
expressed on the matrix by a shifting of the corresponding population.
A Blast alarm is generated from increased counts within the LIC area, this is correlated with Blast
detection on the Basophil curve.
Large lymphocytes are detected in the ALY (Atypical Lymphocytes) zone, where reactive lymphoid
forms, stimulated lymphocytes and plasmocytes are also to be found.
11/11
Software release
1. Service software overview.......................................5-2
1.1. Super User Menu......................................................... 5-2
4.6. Special caracteristics for ABX datas............................6-26
PENTRA 80 TECHNICAL MANUALRAA022AA
1. ABX format principles
1.1. Message structure
The ABX format can have a different number of fields according to the transmitted items setup by
the user (results, curves, flags, etc...). The fields have the same characteristics than the ARGOS format.
The result identifier is different according to the type of result: patient result ("RESULT"), re-run result
(RES-RR), QC result (QC-RES) etc...
Example of "abx format":
- STX
- Size + carriage return.
- Identifier followed by a Load Type + carriage return.
- Identifier followed by the Information associated to the Load Type + carriage return.
- Remainder of the other Identifiers and Informations associated to the Load Type + carriage
returns.
- Other Load Type blocs + Associated Informations.
- Identifier followed by the CheckSum + carriage return.
- ETX
1.2. Details about the structure
Size: 5 bytes representing the total amount of the data except STX and ETX.
Load: An 8 character chain preceeded by a space indicating that this load is a result type.
Identifier: 1 byte (moving about $21 to $FF, it describes the information type which follows this
indicator).
CheckSum: Sum modulo 65535 of all the characters except ETX, STX and all informations about
checksum (identifier - space - checksum - carriage return) in the hexadecimal format on 4 bytes,
preceeded by a space.
Strings of characters having a length smaller than the expected character number have to be
completed on the right handside by "spaces".
2/28
SECTION 6OUTPUT FORMAT
1.3. Identifier list and their formats
1.3.1. Hematology numerical parameters
A- Format description
Numerical field:
For all indicated parameters from $21 to $43, the format is a numerical field of 5 digits
completed with zeros on the left side (ex. : 04.55) and preceeded by a space.
The unit is the standard units (Version V2.2).
When the parameter cannot be calculated by the analyzer, the field is replaced with (--.--).
Parameter status:
Following the numerical field, a first digit gives the counting rejection status or the suspicion, a
second one gives the parameter value status according to high and low normalities, to high and low
extreme values and to the overloading capacities.
Table 1: Identifier First digit
First digit
(letter)
RParameter rejected for a counting default
BIncorrect balance between the counting methods
SSuspicious parameter value
’s pa c e ’No anomaly observed
Correspondance
Table 2: Identifier Second digit
Second digit
(letter)
LParameter < to the lower extreme value
lParameter < to the low normal value
’s pa c e ’Parameter normal value
hParameter > to the high normal value
HParameter > to the high extreme value
OParameter exceeding the capacity
Example:
5.5 millions RBC with a counting error in the standard units :
No restriction on the lentgh for the fields #####. The first 12 parts are followed by the raw counts 1
and 2. For the LMNE channel, only the first 2 parts are initialized with the RA# and CO% values.
SECTION 6OUTPUT FORMAT
Table 4: Parameter extended formats
IdentifiersParametersFormatsLengths
$90ÉWBCNo unit1+[14 x ($20 #####) +1
$91æRBCNo unit1+[14 x ($20 #####) +1
$92ÆHGBNo unit1+[14 x ($20 #####) +1
$93ôHCTNo unit1+[14 x ($20 #####) +1
$94öPLTNo unit1+[14 x ($20 #####) +1
$95òBASONo unit1+[14 x ($20 #####) +1
$96ûLMNENo unit1+[14 x ($20 #####) +1
1.4. Pathology
1.4.1. Flags associated with parameters
Flags are transmitted in a comprehensive mode (same presentation than on the screen, that is to
say dependant from the language), preceeded by a space. They are replaced with spaces when the
flag has not been detected.
Table 5: Flags associated with parameters (English)
The RUO message is a warning message, transmitted allways in english language. Its content
and size depend on the instrument. IN USA AND CANADA, PCT, PDW, ALY AND LIC ARE FOR
5/28
Loading...
+ hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.