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MINDRAY BC3000 WBC RUBY WBC Aperture

MINDRAY BC3000 WBC RUBY WBC Aperture

MINDRAY BC3000 WBC RUBY WBC Aperture WBCs are counted and sized by the Impedance method. This method is based on the measurement of changes in electrical resistance produced by a particle, which in this case is a blood cell, suspended in a conductive diluent as it passes through an aperture of...

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MINDRAY BC3000 WBC RUBY WBC Aperture

WBCs are counted and sized by the Impedance method. This method is based on the

measurement of changes in electrical resistance produced by a particle, which in this case is

a blood cell, suspended in a conductive diluent as it passes through an aperture of known

dimensions. An electrode is submerged in the liquid on both sides of the aperture to create an

electrical pathway. As each particle passes through the aperture, a transitory change in the

resistance between the electrodes is produced. This change produces a measurable

electrical pulse. The number of pulses generated indicates the number of particles that

passed through the aperture. The amplitude of each pulse is proportional to the volume of

each particle. Each pulse is amplified and compared to the internal reference voltage

channels, which only accepts the pulses of a certain amplitude. If the pulse generated is

above the WBC threshold, it is counted as a WBC.


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