Patent ID: 8684971
Filing Date: 2014-04-01
Classification: A61M

Abstract:
1. A peritoneal dialysis system comprising: a hardware unit including a recessed area, a piston having a contact surface, a pneumatic source for supplying a negative pressure, and an actuator configured to move the contact surface of the piston into and out of at least a portion of the recessed area; a disposable unit received by the hardware unit, the disposable unit including an outer member fitted at least partially within the recessed area of the hardware unit, and a moveable membrane positioned between the contact surface of the piston and the outer member when the disposable unit is received by the hardware unit; and a controller configured to cause the pneumatic source to apply the negative pressure to the moveable membrane so as to conform the moveable membrane to a shape of the contact surface of the piston and follow the contact surface when the piston is moved towards and away from the outer member fitted at least partially within the recessed area.