INJECTION DEVICE WITH MEANS FOR DETERMINING EXPELLED DOSE

The present invention provides an injection device (1, 101, 201) comprising a housing (2, 102, 202), a cartridge (30, 130, 230) holding a medical substance and comprising an outlet and a piston (31, 131, 231), a dose expelling mechanism comprising a piston rod system (10, 50, 110, 150, 210, 250) ada...

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Bibliographische Detailangaben
1. Verfasser:	JAKOBSEN, Nikolaj Eusebius
Format:	Patent
Sprache:	eng
Schlagworte:	DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATIONTECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING ORPROCESSING OF MEDICAL OR HEALTHCARE DATA HUMAN NECESSITIES HYGIENE INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTEDFOR SPECIFIC APPLICATION FIELDS MEDICAL OR VETERINARY SCIENCE PHYSICS
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Beschreibung
Zusammenfassung:	The present invention provides an injection device (1, 101, 201) comprising a housing (2, 102, 202), a cartridge (30, 130, 230) holding a medical substance and comprising an outlet and a piston (31, 131, 231), a dose expelling mechanism comprising a piston rod system (10, 50, 110, 150, 210, 250) adapted to be moved relative to the housing (2, 102, 202) during a dose expelling action to thereby advance the piston (31, 131, 231) in the cartridge (30, 130, 230), and a ratchet arm (12) operatively coupled with the piston rod system (10, 50, 110, 150, 210, 250) and configured to undergo a deflecting motion relative to the housing (2, 102, 202) during a particular movement of the piston rod system (10, 50, 110, 150, 210, 250) which corresponds to a predetermined volume of the medical substance being expelled from the cartridge (30, 130, 230), the deflecting motion comprising a first part motion which decelerates the piston rod system (10, 50, 110, 150, 210, 250) followed by a second part motion which accelerates the piston rod system (10, 50, 110, 150, 210, 250), an integrated sensor (76, 176, 276) arranged to detect occurrences of acceleration of the piston rod system (10, 50, 110, 150, 210, 250), and a processor (75, 175, 275) configured to register the occurrences detected by the integrated sensor (76, 176, 276) during the dose expelling action.