you should always aspirate when injecting, once the needles is in draw back slowly on the syringe not much just enough to see a little clear fluid or air come into the syringe, if you have blood come up into the syringe take it out and try again in another spot, when injecting into the delts chances low that you will get the head of the needles right into a vein, but you must always check.
If you finish your jab and your injection spot bleeds (sometimes spurts out) do not worry this does not mean you have injected directly into a vein (as long as you asperated properly) it just means you nicked a vein on the way in.
The ideal size for injecting in the glute is 23 gauge inch. Reason being, injecting into the glute is somewhat difficult when you’re first getting used to it as you have to turn around and watch carefully and not move it around to much which is tough when it’s behind you. For this reason it’s ideal to keep the time it takes to a minimum. Pushing in a 23g will be like a pinch, it doesn’t hurt much. Granted it will hurt more than 25g it won’t be bad, and it will be worth it in the end. Using ” is pretty much necessary as you should always leave a little bit of room between the injection spot and the top of the needle in case it were to ever snap off and you had to pull the needle out (this has never happened and probably never will but better safe than sorry!) To get to the meat in the glute you have to be pretty far in, and thus need a inch to get there.
Addi Turbo Lace circular knitting needles from Skacel are specifically designed for the needs of lace knitters. Sharper tips enable the knitter to manipulate many strands of very fine yarn (see comparison picture of the two different tips). The needles themselves are made with hollow brass with a fine resin protective coating to seal the brass and provide a hint of drag to the needle surface to allow the knitter to keep control over fine lace stitches. The coating also deadens the sound of needles hitting each other. The light blue transparent nylon cord is thinner and more flexible than standard Addi Turbos and the connection to the needles at each end is perfectly smooth and well-tapered allowing stitches to pass over the connection with no catching.