take the syringe out of the wrapper. IF it's a normal syringe, the syringe and needle are 2 seperate components, they come apart. If you want to draw with a larger one and inject with a smaller one, unwrap it ,the needle has a plastic cover on it, take it off, put on a larger gauge, draw your test, pull back the plunger a bit, put the smaller one back on, push the plunger forward to get the air out, swab,stick yourself, aspirate, inject.
the retractable ones I use are one piece and spring loaded, you cant take the needle off. you push the plunger all the way forward the needle retracts into the syringe, so no sharps laying around the house...
for what it's worth- I was a military combat medic for 20 years, I have given a shitload of shots and never ONCE changed a needle because of a concern that the point dulled because it pierced a rubber stopper first or it was easier to draw with a larger gauge, and I've never seen anyone in the medical profession (emergency/OR/clinical/etc) do it, doesnt mean some don't I've just never seen it....but thats the military, we're generally a more rugged bunch of humans
