CPC A61M 5/31535 (2013.01) [A61B 5/4839 (2013.01); A61M 5/168 (2013.01); A61M 5/16886 (2013.01); A61M 5/20 (2013.01); A61M 5/31 (2013.01); A61M 5/31541 (2013.01); A61M 5/31566 (2013.01); A61M 5/31568 (2013.01); G01F 11/025 (2013.01); G01F 17/00 (2013.01); G01F 23/2845 (2013.01); G01F 23/2927 (2013.01); A61B 5/1455 (2013.01); A61M 5/16804 (2013.01); A61M 5/172 (2013.01); A61M 2005/2006 (2013.01); A61M 2005/3254 (2013.01); A61M 2205/18 (2013.01); A61M 2205/3306 (2013.01); A61M 2205/3317 (2013.01); A61M 2205/3379 (2013.01); A61M 2205/3553 (2013.01); A61M 2205/3561 (2013.01); A61M 2205/3576 (2013.01); A61M 2205/3584 (2013.01); A61M 2205/3592 (2013.01); A61M 2205/50 (2013.01); A61M 2205/502 (2013.01); A61M 2205/584 (2013.01); G01N 27/02 (2013.01)] | 17 Claims |
1. A method comprising:
causing a light source to emit electromagnetic radiation into a light guide such that the light guide scatters the received electromagnetic radiation at random angles into a wide radiation pattern and directs the scattered electromagnetic radiation toward the drug container;
detecting a signature of the scattered electromagnetic radiation transmitted through the drug container with a plurality of sensors optically coupleable to the light guide; and
comparing the signature to a plurality of reference signatures to determine a position of an actuator of a drug delivery device.
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