To manually prepare a blood smear in a patient with polycythemia, what adjustment is recommended to the spreading angle?

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Multiple Choice

To manually prepare a blood smear in a patient with polycythemia, what adjustment is recommended to the spreading angle?

When hematocrit is high, the blood is thicker and cells are packed more tightly, so the smear can easily become too thick if spread too aggressively. Lowering the spreading angle from the usual ~30 degrees slows the spread, producing a thinner, more uniform layer that allows accurate cell morphology assessment. Raising the angle or making the spread steeper would worsen thickness and obscure details, while keeping it the same won’t compensate for the increased cell mass. So, reduce the angle from about 30 degrees to obtain an appropriate smear.

When hematocrit is high, the blood is thicker and cells are packed more tightly, so the smear can easily become too thick if spread too aggressively. Lowering the spreading angle from the usual ~30 degrees slows the spread, producing a thinner, more uniform layer that allows accurate cell morphology assessment. Raising the angle or making the spread steeper would worsen thickness and obscure details, while keeping it the same won’t compensate for the increased cell mass. So, reduce the angle from about 30 degrees to obtain an appropriate smear.

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