Automation in Haematology

Automation in Haematology - Automation in haematology Dr...

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Automation in haematology Dr. Suhair Abbas Ahmed
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Automated techniques of blood counting Semi-automated instruments Require some steps, as dilution of blood samples Often measure only a small number of variables Fully automated instruments Require only that an appropriate blood sample is presented to the instrument. They can measure 8-20 variables including some new parameters which do not have any equivalent in manual methods.
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Diagram illustrating the Coulter principle . A stream of cells in suspension passes through a small aperture across which an electrical current is applied. Each cell that passes alters the electrical impedance and can thus be counted and sized.
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Histograms of Coulter S Plus IV Histograms showing the size distribution of white cells, red cells and platelets. Sizing is based on impedance technology.
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Automated instruments They have a high level of precision for cell counting and cell sizing greatly superior to that of the manual tech. The results are generally accurate . Aberrant results consequent on unusual characteristics of blood are “flagged” for subsequent review.
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Hb is measured automatically by a modification of the manual (HiCN) method. To reduce toxicity of HiCN some systems replace it
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This note was uploaded on 12/24/2011 for the course STEP 1 taught by Professor Dr.aslam during the Fall '11 term at Montgomery College.

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Automation in Haematology - Automation in haematology Dr...

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