Patent ID: 8821474
Filing Date: 2014-09-02
Classification: A61M

Abstract:
1. A drug delivery device providing a drug reservoir integrated with an at least partially pressure-compensated flow regulating mechanism, the drug delivery device comprising: (a) a first portion formed primarily from elastomeric material, said first portion at least partially defining an inflatable drug reservoir, said first portion having an opening and a flexible sleeve extending inwards from said opening; and (b) a closure portion cooperating with said opening of said first portion so as to complete said inflatable drug reservoir, wherein said closure portion is implemented as an insert inserted within said flexible sleeve so as to provide a region of overlap between said first portion and said closure portion, said insert being sized to provide pre-tensioning of said inflatable drug reservoir around said insert, and wherein said first portion and said closure portion define an outlet flow path for releasing a drug from said drug reservoir, at least part of said outlet flow path passing between said first portion and said closure portion in said region of overlap, said region of overlap being disposed so as to be acted upon by a pressure within said drug reservoir so as to change a flow impedance of said outlet flow path when the pressure within the reservoir varies, thereby providing an at least partially pressure compensated flow regulating mechanism.