What is the proper procedure for obtaining a blood culture from a central venous access device (CVC or PICC)? Our policy is that you send the first draw from the line; obtaining NO waste prior to the sample. My microbiology section head is questioning this practice. I know I read it somewhere in either the INS standards or the Core Curriculum but now cannot find it and I need to submit some kind of reference or article to this lab person. Can you offer any input on this?