Felis ISSN 2398-2950

Hematology: platelet count

Synonym(s): Thrombocyte

Contributor(s): Karen L Gerber, Andy Torrance

Overview

  • Assessment of platelet numbers.

Sampling

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Tests

Methodologies

QBC-V system

  • Quick but very unreliable.

Manual count

  • With commercial blood dilution system + standard Neubauer chamber gives accurate platelet count.
  • Most automatic counts are also checked manually on a smear Blood smear.
  • On Romansowsky or supravitally stained smear
    • Count platelets and WBCs over same oil immersion field
    • 6-7 platelets per field = ~ 100 x 10*9/l.
    • Normal cat: 10-29 platelets/oil immersion field.
    • Check edges of smear for platelet clumping which   →   artificially low platelet counts.
      Estimates only, considerable errors, but clinically useful.

Automated blood counter

  • Rapid but if platelet clumping occurs   →   low readings.
  • Size of cat platelet.

Result Data

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Further Reading

Publications

Refereed papers

  • Recent references from VetMed Resource and PubMed.
  • Rizzo F, Tappin S W & Tasker S (2007) Thrombocytosis in cats: a retrospective study of 51 cases (2000-2005). J Fel Med Surg 9, 319-325 PubMed.
  • Tasker S, Cripps P J & Mackin A J (2001) Evaluation of methods of platelet counting in the cat. JSAP 42, 326-332.


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