Subodh Grewal: RBC and Platelet Histogram Interpretation
Subodh Grewal, Technical Support Engineer at Promea Therapeutics, shared a post on LinkedIn:
“RBC and Platelet Histogram Interpretation | 5-Part Hematology Analyzer
Histograms provide a graphical representation of cell volume distribution and can help identify abnormal patterns alongside numerical CBC results.
RBC Histogram
- Left shift: Predominance of smaller RBCs
- Right shift: Predominance of larger RBCs
- Broad distribution: Increased variation in RBC size (RDW)
- Bimodal pattern: Two distinct RBC populations may be present
Platelet Histogram
Distribution pattern reflects platelet volume and size variation
Right-sided extension may indicate larger/giant platelets
Abnormal curves can also result from platelet clumps, cell fragments, microcytic RBC interference, or sample-related factors
From a technical perspective, an abnormal histogram should not immediately be considered a patient abnormality.
Always evaluate sample quality, analyzer flags, background, reagents, possible clogging, and instrument performance where applicable.
Key Approach:
Check Numeric Results, then Review Flags, Analyze the Histogram, Rule Out Sample or Technical Interference, and Correlate Clinically and Review
Peripheral Smear when indicated
This is Page 2 of my Hematology Result Interpretation Series.”
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