Unused and used syringe needle comparison - GIF

[wjzemke1968]

The nurse, upon withdrawing the syringe would of known if it was barbed. It would hang up just as it would when withdrawing it from a patient.

Actually, probably not. These barbs are quite small, usually not noticeable with the unaided eye, and not big enough to cause any problems on the way in. They are plenty big enough, however, to snag already traumatized tissue on the way out, and likewise stimulate plenty of pain-receptor nerve endings in doing so. The only way that we could adequately convince the company representative of the existence of the problem was to present him with a photomicrograph of what we saw under the microscope!!!

[dbat74]

ok got it. thanks