Reading the Blood Film: Platelets

What this deck covers

Reading the Blood Film: Platelets in twelve illustrated clinical cases with worked explanations – case presentations built around clinical images, radiology, teaching illustrations and real laboratory data, with the reference range beside every value a case quotes. This visual, data-interpretation style of practice suits candidates preparing for MRCPCH AKP in particular, alongside Saudi and Gulf licensing examinations such as the Arab Board, DHA and OMSB. Each case gives you a clinical vignette, four options, the correct answer, and an explanation of why each of the other three is wrong.

The twelve cases, in order

1. What the film shows instead
2. Where the clumps gather
3. Checking the machine
4. Turning fields into a number
5. The dot on the red cell
6. How large is large
7. Platelet or fragment
8. What goes in the report
9. Estimating with clumps there
10. The sample that would settle it
11. Few, and large
12. What makes an estimate repeatable

What this deck teaches

• A low count is a claim the film can check. Platelets gathered into clumps are counted as one object or as none, and the film is the only place that shows it.
• Look where the clumps go. They gather at the tail and along the edges, which is exactly where a reader working only in the monolayer will never see them.
• An estimate is arithmetic, not an impression. The average number per field, times a factor for the magnification, gives a number that can be set beside the analyser’s.
• Describe platelet size against a red cell. Larger than a third of a red cell across is a description another reader can check. What it implies is settled elsewhere.
• A platelet on a red cell is not an inclusion. It has granules and no nucleus, and it lies over the cell rather than within it – the same question episode five asked of a dot.
• Say what was counted. Which fields, and how many, is what makes one estimate comparable with the next and with somebody else’s.

Exam pearls from this deck

• A number that does not fit the child is a reason to look at the film.
• Every other finding lives in the monolayer. These do not.

The twelve worked cases in this deck, with the images and the full explanation of every option, are part of Pediatric Case Review membership. See what is included, or start with the free Pediatric Exam Review Sets.

More from this system: all haematology illustrated case decks · haematology board questions for bank-style drilling · the free Pediatric Exam Review Sets · pediatric reference values.