US 12,171,926 B2
Pressure measurement devices, methods, and systems
James M. Brugger, Newburyport, MA (US); Dennis M. Treu, Castle Rock, CO (US); Jeffrey H. Burbank, Manchester, MA (US); Scott W. Newell, Ipswich, MA (US); William J. Schnell, Libertyville, IL (US); and Kenneth E. Buckler, Methuen, MA (US)
Assigned to NxStage Medical, Inc., Lawrence, MA (US)
Filed by NxStage Medical, Inc., Lawrence, MA (US)
Filed on Dec. 9, 2022, as Appl. No. 18/078,299.
Application 15/219,334 is a division of application No. 14/115,924, granted, now 9,551,625, issued on Jan. 24, 2017, previously published as PCT/US2012/040298, filed on May 31, 2012.
Application 18/078,299 is a continuation of application No. 16/420,249, filed on May 23, 2019, granted, now 11,529,448.
Application 16/420,249 is a continuation of application No. 15/800,901, filed on Nov. 1, 2017, granted, now 10,345,175, issued on Jul. 9, 2019.
Application 15/800,901 is a continuation of application No. 15/219,334, filed on Jul. 26, 2016, granted, now 9,835,509, issued on Dec. 5, 2017.
Claims priority of provisional application 61/544,266, filed on Oct. 6, 2011.
Claims priority of provisional application 61/491,869, filed on May 31, 2011.
Prior Publication US 2023/0112605 A1, Apr. 13, 2023
Int. Cl. A61M 1/36 (2006.01); G01L 9/00 (2006.01); G01L 19/00 (2006.01)
CPC A61M 1/3641 (2014.02) [A61M 1/362227 (2022.05); A61M 1/3639 (2013.01); A61M 1/3653 (2013.01); A61M 1/3659 (2014.02); G01L 9/0041 (2013.01); G01L 19/0023 (2013.01); G01L 19/003 (2013.01); G01L 19/0046 (2013.01); A61M 1/36224 (2022.05); A61M 2205/3331 (2013.01); A61M 2205/75 (2013.01); A61M 2207/00 (2013.01); G01L 9/006 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for measuring pressure, comprising:
securing a flow channel to a chassis of a measurement device, the flow channel having a flexible wall with a first mechanical engagement feature presented from an external surface of the flexible wall;
engaging the first mechanical engagement feature with a complementary engagement member connected to a force transducer;
the securing being effective to immobilize the flow channel relative to the chassis of the measurement device while allowing the flexible wall to remain displaceable relative to the force transducer;
detecting at least one of a position and an orientation of the flow channel relative to the force transducer and comparing the at least one of a detected position and a detected orientation to at least one of a predefined position and a predefined orientation;
generating a signal responsive to the detecting;
flowing a fluid through the flow channel;
transmitting forces caused by displacement of the flexible wall through the complementary engagement member to the force transducer; and
generating electrical signals responsively to a state of the force transducer and converting the electrical signals to an indication of the pressure.