Drew - Model 2280 - Fully Automated 22 Parameter CBC System

• 22 parameters, 2 scattergrams and 2 histograms
• Short sample detection
• Proprietary laser technology, 5 part WBC differential
• Impedance technology for cell counting
• State of the art patented platelet counting technique
• 80 samples per hour
• Sample size flexibility satisfies a wide range of end user requirements

Scientific Principle :
Multi-dimensional optical scattering using stable laser diode light source to optimize the measurement of WBC differential
Electrical resistance for counting (WBC, RBC, Plt) and sizing (Plt,RBC)
Optical absorbance of cyanmethemoglobin for hemoglobin measurement (there is also an optional cyanide-free reagent).
Full CBC with 5 part differential in under one minute.

Sample Volumes :
Blood samples must be collected in EDTA tubes. Depending on how the 2280 is operated, the system requires :

Direct mode: 180 µL whole blood
Sample saver mode: 80 µL whole blood
Automatic sampler**: 180 µL whole blood

An optional 30 position autosampler is available.
The Autosampler mixes, reads the barcode, pierces the tube cap and automatically aspirates the sample.

Dilution system :
High precision ceramic shear valve and computer controlled diluent dispenser. Automatic rinse inside and outside of the sample probe prevents carryover and reduces risk of transmission of blood borne pathogen to operators.

Sensors :
Laser diode illuminated flow cytometer with three, solid state sensors and one PMT tube for WBC differential.

WBC aperture: 100 µm dia x 75 µm length
RBC/Plt aperture: 78 µm dia x 55 µm length
The Plt/RBC channel features the patented "von Behrens" silencer that eliminates RBC recirculation which interferes with low Plt counts in conventional aperture designs.

WBC, Lymp#, Neut#, Mono#, Eos#, Baso#, Lymp%, Neut%, Mono%, Eos%, Baso%,
RBC, Hgb, Hct, MCV, MCH, MCHC, RDW,
Plt, MPV, Pct*, PDW*
(* - USA : for research only)
The system also displays :
2 x WBC scattergrams, Plt histogram, RBC histogram