Question 72

Hold the slides at 30° to each other when performing the smear.

To ensure a quality result when performing a blood smear, the phlebotomist should hold the slides at a 30° angle to each other. This angle facilitates an even spread of the blood sample, which is crucial for accurate microscopic examination.

A) Hold the two slides at 90° to each other when performing the smear.

Holding the slides at a 90° angle is incorrect as it results in a thick smear that can lead to clumping of cells and an uneven distribution of the blood sample. This thickness can impair the visualization of individual cells, making it difficult to assess morphology accurately.

B) Allow the blood drop to clot slightly prior to performing the smear.

Allowing the blood drop to clot slightly is not advisable because it can lead to an inadequate smear with uneven cell distribution. A fresh drop of blood should be used immediately to ensure optimal spreading and a uniform layer of cells for examination.

C) Hold the slides at 30° to each other when performing the smear.

Holding the slides at a 30° angle is the correct method, as this angle promotes an effective smear technique. It allows for a thin, even layer of blood to be spread across the slide, which is essential for accurate diagnostic evaluation.

D) Allow the blood drop to clot completely prior to performing the smear.

Allowing the blood drop to clot completely is incorrect as it would prevent the formation of a proper smear. A smear requires liquid blood to ensure that the cells are spread uniformly across the slide, which is critical for accurate assessment.

Conclusion

The correct technique of holding the slides at a 30° angle is fundamental for achieving a quality blood smear, as it ensures a proper spread of the sample. All other options either result in improper technique or delay the process, leading to poor quality samples that hinder accurate analysis. Thus, option C is the only viable choice for ensuring optimal results in blood smear preparation.