Equis ISSN 2398-2977

Blood: platelet evaluation

Synonym(s): Thrombocyte

Contributor(s): Robert Shull, Frank Taylor

Overview

  • Assessment of platelet numbers.

Sampling

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Tests

Methodologies

QBC-V system
  • Quick, but unreliable, especially if specimen >1-2 hours post-venepuncture.
    Manual count
  • With commercial blood dilution system + standard Neubauer chamber gives accurate platelet count.
  • Many automatic counts are also checked manually on a smear, especially when the result is low.
  • On Romansowsky or supravitally stained smear
    • Count platelets and WBCs over same oil immersion field .
    • 6-7 platelets per 1000x field = ~ 100 x 10*9/l.
    • Check edges of smear for platelet clumping which   →   artificially low platelet counts.
      Estimates only, considerable errors, but clinically useful

    Automated bood counter
  • Rapid but if platelet clumping occurs   →   low readings.

Result Data

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Further Reading

Publications

Refereed papers

  • Barrelet A (2004)Laboratory tests in equine practice Part 2: Haematological analyses. UK Vet9(8), 13-23.


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