10058694 cites 148 patents.

Improvements in fluid volume measurement systems are disclosed for a pneumatically actuated diaphragm pump in general, and a peritoneal dialysis cycler using a pump cassette in particular. Pump fluid volume measurements are based on pressure measurements in a pump control chamber and a reference chamber in a two-chamber model, with different sections of the apparatus being modeled using a combination of adiabatic, isothermal and polytropic processes. Real time or instantaneous fluid flow measurements in a pump chamber of a diaphragm pump are also disclosed, in this case using a one-chamber ideal gas model and using a high speed processor to obtain and process pump control chamber pressures during fluid flow into or out of the pump chamber. Improved heater control circuitry is also disclosed, to provide added or redundant safety measures, or to reduce current leakage from a heater element during pulse width modulation control of the heater. Improvements are also disclosed in the application of negative pressure during a drain phase in peritoneal dialysis therapy, and to control the amount of intraperitoneal fluid accumulation during a therapy. Improvements in efficiency are also disclosed in the movement of fluid into and out of a two-pump cassette and heater bag of a peritoneal dialysis cycler, and in the synchronization of the operation of two or more pumps in a peritoneal dialysis cycler or other fluid handling devices using a multi-pump arrangement.

Title
Medical treatment system and methods using a plurality of fluid lines
Application Number
14/732571
Publication Number
10058694 (B2)
Application Date
June 5, 2015
Publication Date
August 28, 2018
Inventor
Joseph P Rushlow
Belmont
NH, US
Daniel B Singer
Lowell
MA, US
Daniel S Karol
Southborough
MA, US
Paul G Girouard
Allenstown
NH, US
Jinsun Yoo
Melrose
MA, US
Edgar J Bolton
Newton
NH, US
David B Doherty
Litchfield
NH, US
Simon C Helmore
Somerville
MA, US
David W McGill
Alpharetta
GA, US
David A Beavers
Manchester
NH, US
Andrew S Coll
Manchester
NH, US
John M Kerwin
Manchester
NH, US
James D Dale
Nashua
NH, US
David J Hibbard
Bedford
NH, US
Geoffrey P Spencer
Manchester
NH, US
Robert J Bryant Jr
Manchester
NH, US
Jacob W Scarpaci
Manchester
NH, US
Michael G Norris
Manchester
NH, US
Agent
Wolf Greenfield & Sacks P C
Assignee
DEKA Products Partnership
NH, US
IPC
A61M 1/10
A61M 1/16
A61M 39/22
A61M 1/28
View Original Source