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1. (WO2016050902) PEN-TYPE DRUG INJECTOR AND ADD-ON MODULE WITH MAGNETIC DOSAGE SENSOR SYSTEM AND ERROR DETECTION

Pub. No.:    WO/2016/050902    International Application No.:    PCT/EP2015/072673
Publication Date: Fri Apr 08 01:59:59 CEST 2016 International Filing Date: Fri Oct 02 01:59:59 CEST 2015
IPC: A61M 5/24
A61M 5/315
G01D 5/14
G01R 33/02
G01R 33/09
A61M 5/20
G01D 5/244
G01D 5/245
A61M 5/31
Applicants: NOVO NORDISK A/S
Inventors: KRUSELL, Nikolaj Frogner
Title: PEN-TYPE DRUG INJECTOR AND ADD-ON MODULE WITH MAGNETIC DOSAGE SENSOR SYSTEM AND ERROR DETECTION
Abstract:
Add-on module (100) for logging the value of an expelled dose from a pen-type drug injector (200), comprising a magnetic sensor system comprising first and second sensor means (745/746) as well as a mechanical dose setting and expelling mechanism comprising a magnetic clutch element (240/740) which rotates during drug expelling. The system further comprises processor means configured to determine (i) on the basis of measured values from the first sensor means, a rotational position of the clutch element, (ii) on the basis of measured values from the second sensor means, a high-speed condition in which the rotational speed of the clutch element exceeds a given threshold level, and (iii) indicate an error state if the high-speed condition is detected.