A safety shield system for a needle cannula of a pen needle injector or similar device, wherein a safety shield may be retracted from a first position enclosing the needle cannula to a second position exposing the needle cannula for injection.

A needle injector (10) includes a syringe body (12) along with a needle (14) disposed in fluid communication with said syringe body (12).

An injector such as a needle-type autoinjector having a flexible flange disposed at an injection end of the injector for stretching or pinching the skin of the injection site.

One of the problems is that a single needle injector tends to create pockets of cure and pockets of no cure.