Recently I saw a 9 month old patient with a Broviac central line. As I was about to flush the catheter with a prefilled 10cc syringe of NS, the mom asked me to remove that little bit of air from the syringe. I have never done this before; but it got me to wondering if I should be? I usually just attach the syringe and push. I figure the amount of air is so small, but again, this was a pediatric patient. Any suggestions on how I should be doing this?