How to Read a Platelet Histogram

Vastian Learning
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Continuing Education Credits

P.A.C.E.® Contact Hours: hour(s)

Florida Board of Clinical Laboratory Science CE Credit Hours

: hour(s)

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Objectives

  • Describe the axes and expected appearance of a platelet histogram.
  • Apply a systematic method to assess the histogram’s position, width, shape, and boundaries.
  • Recognize patterns that may indicate large platelets, platelet aggregates, cellular fragments, or platelet-red blood cell (RBC) overlap.
  • Correlate the histogram with the platelet count, platelet indices, analyzer flags, RBC results, and peripheral blood smear findings.
  • Identify findings that require further investigation before platelet results are reported.

Course Outline

  • How to Read a Platelet Histogram
    • What is a Platelet Histogram?
    • Use a Systematic Reading Method
    • Step 1: Confirm the Count and Counting Method
    • Step 2: Evaluate the Position
    • Step 3: Evaluate the Width and Shape
    • Step 4: Examine the Boundaries and Possible Overlap
    • Step 5: Correlate Before Reporting
    • Table: Common Histogram Patterns
    • Figures: Common Histogram Patterns
    • Case Study
    • Key Takeaways
  • References
    • References

Additional Information

This is a mini course designed to enhance learning and reinforce existing knowledge. It does not provide continuing education (CE) credit. The purpose of this course is to support ongoing professional development and review.