Drug Delivery Device with Variable Dose Setting Mechanism

摘要

A drug delivery system (1) comprising first (35) and second reservoir units (30) with first and second identifiers (32), and a main unit (10) adapted to receive either of the first (35) and second reservoir units (30) in a mounted position. The main unit (10) comprises drug expelling means having dose setting means (11, 1, 14, 15, 19) comprising a rotational dose setting member allowing a user to set a desired dose size for the given drug, the dose size being set in fixed increments for a given state. The drug expelling means has a first state in which an increment corresponds to a first volume of drug, and a second state in which an increment corresponds to a second volume of drug, wherein the drug expelling means is set in the first state by means of the first identifier when a first reservoir unit is mounted, and the drug expelling means is set in the second state by means of the second identifier when a second reservoir unit is mounted.

主权项

1. A drug delivery system, comprising:
a first reservoir unit comprising:
a first drug formulation of a given drug having a first concentration, anda first mechanical identifier corresponding to the first drug formulation, a second reservoir unit comprising:
a second drug formulation of the given drug having a second concentration, andsecond mechanical identifier corresponding to the second drug formulation, a main unit comprising:
mounting structure allowing either of the first and second reservoir units to be mounted relative to the main unit,drug expelling structure for expelling drug from a mounted reservoir unit corresponding to a set dose size, the drug expelling means comprising:dose setting structure comprising a rotational dose setting member allowing a user to set a desired dose size for the given drug, the dose size being set in fixed increments for a given state,wherein the drug expelling structure has a first state in which an increment corresponds to a first amount of angular displacement of the dose setting member corresponding to a first volume of drug,wherein the drug expelling structure has a second state in which an increment corresponds to a second amount of angular displacement of the dose setting member corresponding to a second volume of drug, andwherein the drug expelling structure is set in the first state by structure of the first identifier when a first reservoir unit is mounted, and the drug expelling structure is set in the second state by structure of the second identifier when a second reservoir unit is mounted.