US 11,701,458 B2
Treatment fluid devices methods and systems
Orlando Soto, Amesbury, MA (US); Joseph Rausa, Lawrence, MA (US); James M. Brugger, Newburyport, MA (US); William J. Schnell, Libertyville, IL (US); Goetz Friederichs, Beverly, MA (US); Jeffrey H. Burbank, Manchester, MA (US); Joseph E. Turk, Jr., North Andover, MA (US); Scott W. Newell, Ipswich, MA (US); and Amanda Wozniak, Somerville, MA (US)
Assigned to NxStage Medical, Inc., Lawrence, MA (US)
Filed by NxStage Medical, Inc., Lawrence, MA (US)
Filed on Dec. 12, 2019, as Appl. No. 16/712,385.
Application 16/712,385 is a division of application No. 15/337,999, filed on Oct. 28, 2016, granted, now 10,518,014.
Claims priority of provisional application 62/297,514, filed on Feb. 19, 2016.
Claims priority of provisional application 62/253,650, filed on Nov. 10, 2015.
Claims priority of provisional application 62/249,324, filed on Nov. 1, 2015.
Claims priority of provisional application 62/248,764, filed on Oct. 30, 2015.
Prior Publication US 2020/0155747 A1, May 21, 2020
Int. Cl. A61M 1/16 (2006.01); A61M 5/142 (2006.01)
CPC A61M 1/1668 (2014.02) [A61M 1/1601 (2014.02); A61M 1/1605 (2014.02); A61M 1/1666 (2014.02); A61M 5/14228 (2013.01); A61M 2205/12 (2013.01); A61M 2205/3317 (2013.01); A61M 2205/3368 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A conductivity measurement device in a medicament generation system including a fluid circuit, the conductivity measurement device comprising:
a first conductivity measurement flow channel positioned in the fluid circuit;
a second conductivity measurement flow channel positioned in the fluid circuit;
an intermediate flow channel positioned in the fluid circuit and fluidly linking the first and second conductivity measurement flow channels to each other, the intermediate flow channel being at least partially bounded by a portion of a molded rigid case and a film adhered to the molded rigid case and being configured to maintain a constant content concentration of a fluid in a fluid flow from the first conductivity measurement flow channel to the second conductivity measurement flow channel; and
a controller having a current source connected to the first and second conductivity measurement flow channels, the controller being configured to apply alternating voltages at frequencies that are different, each frequency being respective to one of the first and second conductivity measurement flow channels.