When blood cultures are required, which item should be drawn first?

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Multiple Choice

When blood cultures are required, which item should be drawn first?

Explanation:
When collecting blood for cultures, the sterile culture bottles should be drawn first. This preserves a truly aseptic sample and reduces the risk that additives or materials from subsequent tubes contaminate the culture or alter its growth. The other tubes contain substances like anticoagulants or clot activators (for example, citrate, EDTA, or fluoride/oxalate) that can interfere with culture growth or contaminate the specimen, so they are collected after the culture bottles.

When collecting blood for cultures, the sterile culture bottles should be drawn first. This preserves a truly aseptic sample and reduces the risk that additives or materials from subsequent tubes contaminate the culture or alter its growth. The other tubes contain substances like anticoagulants or clot activators (for example, citrate, EDTA, or fluoride/oxalate) that can interfere with culture growth or contaminate the specimen, so they are collected after the culture bottles.

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