Canadian Society for Medical Laboratory Science (CSMLS) Practice Exam 2025 - Free Medical Laboratory Science Practice Questions and Study Guide

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What is the likely cause of a blood smear that appears too long?

Blood drop too small

Spreader angle too low

A blood smear that appears too long typically results from using a blood drop that is too large. When the drop of blood is excessive, it can create a smear that extends beyond the desirable length and potentially results in a thicker layer of blood on the slide. This thickness may prevent proper cell morphology assessment, as the cells can overlap or clump together, making it difficult to view individual cells clearly.

A drop that is appropriate in size allows for an optimal spread, ensuring a monolayer of cells that is thin enough for proper microscopy. In contrast, using a drop that is too small would generally create a shorter smear, while an incorrect spreader angle can also affect the length; however, these options do not directly cause an overly long smear. Therefore, understanding the relationship between the size of the blood drop and the final smear length is essential for creating high-quality blood smears in laboratory practice.

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Blood drop too large

Spreader angle too high

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