AUTO INJECTOR WITH DETECTION OF USED CARTRIDGE AND ASSOCIATED METHOD

Disclosed is an auto-injector for administering a medicament, comprising: a housing; a cartridge receiver configured to receive a cartridge comprising a first stopper; a drive module coupled to move a plunger rod configured to move the first stopper; a resistance sensor configured to provide a resis...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Jensen, Steen, Pedersen, Per Mølgaard, Lind, Michael, Egesborg, Henrik
Format: Patent
Sprache:eng
Schlagworte:
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Beschreibung
Zusammenfassung:Disclosed is an auto-injector for administering a medicament, comprising: a housing; a cartridge receiver configured to receive a cartridge comprising a first stopper; a drive module coupled to move a plunger rod configured to move the first stopper; a resistance sensor configured to provide a resistance signal indicative of resistance against movement of the plunger rod; and a processing unit coupled to the drive module and to the resistance sensor. The processing unit being configured to: control the drive module to move the plunger rod towards the extended plunger rod position; determine present plunger rod position; receive the resistance signal; determine a cartridge parameter based on the resistance signal and the present plunger rod position; and control the drive module to adjust the movement of the plunger rod based on the cartridge parameter.