Final answer:
If an IV is in place and there are no other accessible sites, the blood specimen can be collected from the IV line. However, it's best to use a separate venipuncture site for blood collection if possible.
Step-by-step explanation:
When an IV is in place and there are no other accessible sites, the blood specimen can be collected from the IV line.
However, it's important to note that blood collection from an IV line is not ideal, as it can lead to contamination or dilution of the sample with the fluids in the IV bag. If possible, it's best to use a separate venipuncture site for blood collection.