External drug pump

摘要: Apparatus is described for administering a substance to subject. A vial contains the and stopper disposed within slidably coupled vial. first threaded element (a) rotatable with respect (b) substantially immobile proximally during rotation of element. second threadedly At least distal end non-rotatable vial, defines coupling portion that couples stopper. The element, by rotating, linearly advances at toward Other embodiments are also described.