US 11,690,959 B2
Dose measurement systems and methods
Kevin Sihlanick, Cambridge, MA (US); Richard Whalley, Cambridge, MA (US); Matthew Legrand, Cambridge, MA (US); James White, Cambridge, MA (US); and Jeffrey Carothers, Somerville, MA (US)
Assigned to BIGFOOT BIOMEDICAL, INC., Milpitas, CA (US)
Filed by Bigfoot Biomedical, Inc., Milpitas, CA (US)
Filed on Sep. 22, 2021, as Appl. No. 17/481,834.
Application 17/481,834 is a continuation of application No. 16/880,352, filed on May 21, 2020, granted, now 11,389,595.
Application 16/880,352 is a continuation of application No. 16/209,580, filed on Dec. 4, 2018, granted, now 10,695,501, issued on Jun. 30, 2020.
Application 16/209,580 is a continuation of application No. 15/649,224, filed on Jul. 13, 2017, granted, now 10,183,120, issued on Jan. 22, 2019.
Claims priority of provisional application 62/362,946, filed on Jul. 15, 2016.
Prior Publication US 2022/0008658 A1, Jan. 13, 2022
Int. Cl. A61M 5/168 (2006.01); A61M 5/315 (2006.01); G01F 11/02 (2006.01); G01F 17/00 (2006.01); G01F 23/284 (2006.01); G01F 23/292 (2006.01); A61M 5/20 (2006.01); A61B 5/00 (2006.01); A61M 5/31 (2006.01); A61B 5/1455 (2006.01); A61M 5/172 (2006.01); A61M 5/32 (2006.01); G01N 27/02 (2006.01)
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
OG exemplary drawing
 
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.