Multi-stroke delivery pumping mechanism for a drug delivery...

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/48 (2006.01) A61M 5/19 (2006.01) A61M 5/315 (2006.01)

Patent

CA 2746160

A dual-chambered drug delivery device (201) includes a cartridge (211) having a first chamber (212) for storing a medicament and a second chamber (221) in fluid communication with the first chamber (212). A dose setting member (241) is used to set a medicament dose to be injected at an injection site. A piston (281) is disposed in the second chamber (221). An upward stroke of the piston (281) draw a portion of the medicament dose into the second chamber (221) and a downward stroke of the piston (281) expels the portion of the medicament dose. A needle (205) communicates with the second chamber (221) for sequentially injecting the portions of the medicament dose into the injection site.

L'invention concerne un dispositif d'administration de médicament à deux chambres (201) comprenant une cartouche (211) ayant une première chambre (212) pour recevoir un médicament et une deuxième chambre (221) en communication fluidique avec la première chambre (212). Un élément de réglage de dose (241) est utilisé pour régler une dose de médicament à injecter au niveau d'un lieu d'injection. Un piston (281) est disposé dans la deuxième chambre (221). Une course ascendante du piston (281) aspire une partie de la dose de médicament dans la deuxième chambre (221) et une course descendante du piston (281) expulse la partie de la dose de médicament. Une aiguille (205) communique avec la deuxième chambre (221) pour injecter séquentiellement les parties de la dose de médicament dans le lieu d'injection.

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