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03 Aug 2017
This is done by flow cytometric analysis for detection of lack of GpIb/IX in Bernanrd Soulier syndrome (deficiency of CD42), and lack of GpIIb/IIIa in Glanzmann’s thrombasthenia (deficiency of CD41,…
03 Aug 2017
D-dimer is derived from the breakdown of fibrin by plasmin and D-dimer test is used to evaluate fibrin degradation. Blood sample can be either serum or plasma. Latex or polystyrene…
03 Aug 2017
FDPs are fragments produced by proteolytic digestion of fibrinogen or fibrin by plasmin. For determination of FDPs, blood is collected in a tube containing thrombin (to remove all fibrinogen by…
31 Jul 2017
Automated hematology analyzers work on different principles:   Electrical impedance Light scatter Fluorescence Light absorption Electrical conductivity.   Most analyzers are based on a combination of different principles.   (1)…
30 Jul 2017
AUTOMATED HEMOTOLOGY ANALYZER   Automation is a process of replacement of tasks hitherto performed by humans by computerized methods.   Until recently, hematological tests were performed only by manual methods.…
29 Jul 2017
CAUSES OF ERRONEOUS RESULTS (INTERFERENCES CAUSING ABNORMAL RESULT)   These are listed in Table 809.1   Table 809.1 Causes of erroneous results with hematology analyzer Parameter Interfering factors   Erroneous increase…
29 Jul 2017
Parameters measured by hematology analyzers and their derivation are shown in Tables 808.1 and 808.2. Most automated hematology analyzers measure red cell count, red cell indices (mean cell volume, mean…
29 Jul 2017
FLOW CYTOMETRY   Flow cytometry is a procedure used for measuring multiple cellular and fluorescent properties of cells when they flow as a single cell suspension through a laser beam…
29 Jul 2017
Fluorescence   A fluorochrome absorbs light energy and emits excess energy in the form of photon light (fluorescence). Fluorescence is the property of molecules to absorb light at one wavelength…
28 Jul 2017
Leukemias and lympomas: Immunophenotyping (evaluation of cell surface markers), diagnosis, detection of minimal residual disease, and to identify prognostically important subgroups. Paroxysmal nocturnal hemoglobinuria: Deficiency of CD 55 and CD…
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