BIOSCIENCE.

CAUSES OF ERRONEOUS RESULTS (INTERFERENCES CAUSING ABNORMAL RESULT) WITH HEMOTOLOGY ANALYZER

Saturday, 29 July 2017 14:18

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 Erroneous decrease
0. All parameters
—
  • Clotted sample
1. WBC count
  • Nucleated red cells
  • Large platelet clumps
  • Unlysed red cells (some abnormal red cells resist lysing)
  • Cryoglobulins
  • Clotted sample
2. RBC count
  • Very high WBC*
  • Large numbers of giant platelets
  • Clotted sample
  • Microcytic red cells
  • Autoagglutination
3. Hemoglobin
  • Very high WBC
  • Hyperlipidemia
  • High bilirubin
  • Clotted sample
4. MCV
  • Very high WBC
  • Hyperglycemia
  • Autoagglutination (cold agglutinins)
  • Cryoglobulins
5. MCHC
  • Hyperlipidemia
  • Autoagglutination (cold agglutinins)
  • Very high WBC
6. Platelets
  • Microcytic red cells
  • WBC fragments
  • Cryoglobulins
  • Platelet satellitism
  • Platelet clumping
*: WBCs are counted along with RBCs, but normally their number is statistically insignificant
 
 
FLAGGING
 
‘Flags’ are signals that occur when an abnormal result is detected by the analyzer. Flags are displayed to reduce false-positive and false-negative results by mandating a review of blood smear examination.

PARAMETERS MEASURED BY HEMATOLOGY ANALYZERS

Saturday, 29 July 2017 12:54

FLOW CYTOMETRY

Saturday, 29 July 2017 10:37

TERMINOLOGIES USED IN FLOWCYTOMETRY

Saturday, 29 July 2017 10:09

COMMON APPLICATIONS OF FLOW CYTOMETRY IN HEMATOLOGY

Friday, 28 July 2017 12:59

Platelet Aggregation Studies

Friday, 28 July 2017 05:05

EXAMINATION OF BLOOD SMEAR

Thursday, 27 July 2017 06:22

MORPHOLOGY OF PLATELETS

Wednesday, 26 July 2017 12:45

NUMERICAL ABNORMALITIES OF LEUKOCYTES

Wednesday, 26 July 2017 11:28
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