Uploaded July 2016 | Updated September 2026, 5 hours ago

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In my previous video on aspirating before you inject, I recommended swapping needles if you do draw blood while aspirating. A viewer wants to know why I said this, so let's find out.

You can find the video "What Is Aspirating And How Do You Aspirate? " here: youtube.com/watch?v=GAgaweICrso