Mohammed Maher Babiker/LinkedIn
Jun 23, 2026, 22:59
Mohammed Maher Babiker: When ‘Low Platelets’ aren’t Really Low
Mohammed Maher Babiker, Former Vice Head of Department at AL Burgaig Teaching Hospital, shared a post on LinkedIn:
“Don’t let EDTA fool you: When ‘low platelets’ aren’t really low!
In hematology, an accurate platelet count changes patient management. But EDTA, our most common anticoagulant, can create a false alarm called pseudothrombocytopenia.
Why platelet counts come back falsely low?
- Platelet clumping: EDTA exposes hidden epitopes – antibodies bind – platelets aggregate. Analyzer counts 1 clump as 1 cell.
- Cold agglutinins: Antibodies cause clumping at room temp.
- Pre-analytical errors: Delayed processing or poor mixing.
- Instrument limits: Aggregates misread as larger cells.
- Hemolysis: Interferes with accurate counting.
How to fix it and avoid patient harm:
- Switch anticoagulant: Use citrate or heparin tubes for patients with known clumping.
- Tighten handling: Mix well and process promptly.
- Verify with a smear: Peripheral blood smear is the fastest way to spot clumps vs true thrombocytopenia.
- Repeat testing: Fresh sample, different tube if results don’t match clinical picture.
- Train the team: Staff awareness of EDTA artifacts prevents over-treatment.
A falsely low count can mean cancelled surgeries, unnecessary transfusions, or biopsies.
The fix is often just a smear and repeat tube.
Lab accuracy – better patient care.”
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