Why would you use 10ml syringes? Have you been filtering your stuff? Prolly a troll thread but if not you should have been in the ER 10 minutes after you realized.
This isn't the kind of thing you want to be reusing at all regardless. Sure you're using new pins, but that syringe isn't even clean after use, much less sterile. Anything the hospitals or whatever reuse obviously go through a crazy sterilization process. Always always use a new rig. This is basic stuff man.