Patent ID: 8376999
Filing Date: 2013-02-19
Classification: A61M

Abstract:
1. A peritoneal dialysis system comprising: a hardware unit including a piston having a contact surface, a pneumatic source for supplying a negative pressure, a stepper motor configured to move the piston, a controller including at least one processor and memory device programmed to control the pneumatic source and the stepper motor, and a video monitor operating with a touch screen to enable a user to send and receive information to and from the controller; and a disposable unit received by the hardware unit, the disposable unit including a moveable membrane positioned adjacent to and operable with the contact surface of the piston, the piston moveable towards and away from the disposable unit, wherein the programmed at least one processor and memory of the controller operate to (i) cause the pneumatic source to apply the negative pressure to the moveable membrane so that the negative pressure moves the membrane to conform to a shape of the contact surface and (ii) control the stepper motor so that the shape-contacted membrane follows the piston as the piston is moved away from the disposable unit and moves with the piston as the piston is moved into the disposable unit.