Methods, such as using a fan to dry blood films faster, are especially important when:

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Using a fan to dry blood films faster can be important when there is high humidity, as it can slow down the drying process. Additionally, if the patient is anemic and there is less blood on the slide, using a fan can help evaporate the moisture faster. However, if there is polycythemia, there may be more blood on the slide, which may not dry as quickly with a fan. As for the age of the sample, it is generally recommended to prepare and stain blood films within 2 hours of collection, so using a fan may not be as effective if the sample is already over 6 hours old. The availability of someone to blow on the blood film is not relevant to the effectiveness of using a fan.

Methods, Such as Using a Fan to Dry Blood Films