US 12,083,310 B2
Infusion system and method which utilizes dual wavelength optical air-in-line detection
Gary David Shubinsky, Buffalo Grove, CA (US); Tamas Ban, Grayslake, IL (US); and Brian G. Markey, Park Forest, IL (US)
Assigned to ICU Medical, Inc., San Clemente, CA (US)
Filed by ICU Medical, Inc., San Clemente, CA (US)
Filed on Apr. 8, 2022, as Appl. No. 17/658,615.
Application 17/658,615 is a continuation of application No. 16/505,479, filed on Jul. 8, 2019, granted, now 11,298,456.
Application 16/505,479 is a continuation of application No. 14/633,614, filed on Feb. 27, 2015, granted, now 10,342,917, issued on Jul. 9, 2019.
Claims priority of provisional application 61/946,031, filed on Feb. 28, 2014.
Prior Publication US 2022/0296806 A1, Sep. 22, 2022
Int. Cl. A61M 5/14 (2006.01); A61M 5/168 (2006.01); A61M 5/172 (2006.01); A61M 5/36 (2006.01)
CPC A61M 5/14 (2013.01) [A61M 5/16831 (2013.01); A61M 5/365 (2013.01); A61M 5/172 (2013.01); A61M 2205/3313 (2013.01); A61M 2205/50 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An infusion system comprising:
a first beam splitter configured to direct a first optical signal through a predetermined path across a fluid delivery line and further direct a second optical signal through the predetermined path across the fluid delivery line, wherein the first and the second optical signals are generated by separate optical transmitters;
a second beam splitter configured to receive the first optical signal the second optical signal after the first and the second optical signals have traversed the predetermined path across the fluid delivery line;
a first receiver configured to receive the first optical signal from the second beam splitter; and
a second receiver configured to receive the second optical signal from the second beam splitter.