I mix the Botox with saline, drawing it up into two syringes, each tipped with a tiny, yellow needle, then inject it at multiple points across the armpit.

Results :The occlusion rate of superficial vein detained needle was 22.1% in group of normal saline, but 7.4% in group of heparin sodium(P<0.05).

Methods. Mechanics were measured after sham phosphate buffered saline injection with a 27 G or 33 G needle in the rat and with a 27 G needle in the sheep.