US 12,337,152 B2
Click event identification in delivery devices
Jürg Steck, Kirchberg (CH); Andreas Schneider, Bern (CH); Simon Dähler, Kirchberg (CH); Jürg Hirschel, Bern (CH); Krista Kappeler, Bern (CH); Florian Kühni, Bern (CH); Simon Schüpbach, Bern (CH); Amir Feriani, Auvernier (CH); and Ludovic Zulliger, Orbe (CH)
Assigned to Ypsomed AG, Burgdorf (CH)
Filed by Ypsomed AG, Burgdorf (CH)
Filed on Nov. 17, 2020, as Appl. No. 16/950,113.
Application 16/950,113 is a continuation of application No. PCT/IB2019/053367, filed on Apr. 24, 2019.
Claims priority of application No. 18173675 (EP), filed on May 22, 2018.
Prior Publication US 2021/0085880 A1, Mar. 25, 2021
Int. Cl. A61M 5/315 (2006.01); G01C 19/00 (2013.01); G01P 15/18 (2013.01); G16H 20/17 (2018.01); G16H 40/40 (2018.01); G16H 40/63 (2018.01); G16H 40/67 (2018.01); G16H 50/70 (2018.01); A61M 5/31 (2006.01)
CPC A61M 5/31568 (2013.01) [A61M 5/3155 (2013.01); A61M 5/3157 (2013.01); A61M 5/31585 (2013.01); G01C 19/00 (2013.01); G01P 15/18 (2013.01); G16H 20/17 (2018.01); G16H 40/40 (2018.01); G16H 40/63 (2018.01); G16H 40/67 (2018.01); G16H 50/70 (2018.01); A61M 2005/3126 (2013.01); A61M 2205/3327 (2013.01); A61M 2205/52 (2013.01); A61M 2205/581 (2013.01); A61M 2205/582 (2013.01); A61M 2205/8206 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method of determining a dose of a variable-dose injection device with feedback means generating a number of feedback events proportionate to the dose, comprising:
measuring, by a first feedback sensor, a first signal comprising a first signal peak related to a feedback event, wherein the first feedback sensor is configured as a multi-axis gyroscope;
detecting the first signal peak in the first signal;
selecting an evaluation interval comprising the detected first signal peak;
deriving, from the first signal limited to the evaluation interval, a feature of the feedback event, wherein deriving the feature comprises:
calculating, for each axis of the gyroscope, a correlation value of a test signal with a single-axis gyroscope signal, and adding the correlation values; or
calculating, for each axis of the gyroscope, a sum of absolute derivatives of a single-axis gyroscope signal, and adding the sums;
identifying, from the derived feature, the feedback event as an expel feedback event; and
counting the number of identified expel feedback events to determine an expelled dose.