Peritoneal dialysis using pressurized cylinder
AssigneesBaxter International Inc., Baxter Healthcare S.A.
InventorBelur Shanthakumar SHASHANKA JAIN
Life of this patent
Estimating the term…
Abstract
A peritoneal dialysis system includes a control unit configured to cause (i) a fluid inlet valve and a fluid outlet valve to occlude a fluid inlet line and a fluid outlet line, respectively, while a linear actuator moves a piston to create a positive pressure within a pump housing, the positive pressure measured by a pressure sensor, and (ii) the fluid inlet valve to occlude the fluid inlet line and the fluid outlet valve to open the fluid outlet line, while the linear actuator moves the piston so as to maintain the positive pressure within the pump housing while fluid is pumped out of the fluid pump chamber via the opened fluid outlet line.
Claims22
A peritoneal dialysis system comprising:
- a pump housing;
- a cylinder in pneumatic communication with the pump housing;
- a piston including a piston head slideably sealed within the cylinder;
- a linear actuator in mechanical communication with the piston;
- a pressure sensor positioned and arranged to sense a pressure within the pump housing caused by movement of the piston within the cylinder;
- a fluid inlet valve;
- a fluid outlet valve;
- a fluid pump chamber including a flexible membrane moved by the pressure within the pump housing when the fluid pump chamber is sealed to the pump housing;
- a fluid inlet line and a fluid outlet line in fluid communication with the fluid pump chamber;
- and
- a control unit configured to cause (i) the fluid inlet valve and the fluid outlet valve to occlude the fluid inlet line and the fluid outlet line, respectively, while the linear actuator moves the piston to create a positive pressure within the pump housing, the positive pressure measured by the pressure sensor, and (ii) the fluid inlet valve to occlude the fluid inlet line and the fluid outlet valve to open the fluid outlet line, while the linear actuator moves the piston so as to maintain the positive pressure within the pump housing while fluid is pumped out of the fluid pump chamber via the opened fluid outlet line.
A peritoneal dialysis system comprising:
- a cycler including
- a pump housing,
- a linear actuator,
- a pressure sensor positioned and arranged to sense a pressure within the pump housing caused by movement of the linear actuator,
- a fluid inlet valve, and
- a fluid outlet valve;
- a disposable set including
- a fluid pump chamber including a flexible membrane moved by the pressure within the pump housing when the fluid pump chamber is sealed to the pump housing, and
- a fluid inlet line and a fluid outlet line in fluid communication with the fluid pump chamber;
- and
- a control unit configured to cause (i) the fluid inlet valve and the fluid outlet valve to occlude the fluid inlet line and the fluid outlet line, respectively, while the linear actuator creates a positive pressure within the pump housing, the positive pressure measured by the pressure sensor, and (ii) the fluid inlet valve to occlude the fluid inlet line and the fluid outlet valve to open the fluid outlet line, while the linear actuator maintains the positive pressure within the pump housing and fluid is pumped out of the fluid pump chamber via the opened fluid outlet line.
Dependencies are inferred from the claim text.