Patent ID: 9180237
Filing Date: 2015-11-10
Classification: A61M

Abstract:
1. A hemodialysis system comprising: an arterial blood line for connecting to a patient's artery for collecting blood from a patient; a venous blood line for connecting to a patient's vein for returning blood to a patient; a dialyzer; a blood flow path connected to said arterial blood line and said venous blood line for transporting blood from a patient to said dialyzer and back to a patient; a reservoir for storing a dialysate solution; a dialysate flow path, isolated from the blood flow path, for transporting a dialysate from said reservoir to said dialyzer and back to said reservoir; a filter connected to said dialysate flow path downflow from said dialyzer for removing uremic toxins from dialysate in said a dialysate flow path after said dialyzer and prior to returning said dialysate to said reservoir; a first pump including a first pump motor and a first pump actuator connected to said dialysate flow path upflow from said dialyzer for pumping dialysate through said dialysate flow path to said dialyzer, said first pump actuator including a sliding vane construction having non-deformable components including a housing having a central cavity forming an internal sidewall, a rotor eccentrically positioned within said cavity and said rotor having a plurality of radially aligned slots at said rotor's periphery, vanes slideably positioned in said slots to slide in and out of said slots so as to seal with the cavity's internal sidewall creating vane chambers that pump dialysate through said dialysate flow path; a second pump including a second pump motor and a second pump actuator connected to said dialysate flow path upflow from said dialyzer for pumping dialysate through said dialysate flow path, said second pump actuator including a sliding vane construction having non-deformable components including a housing having a central cavity forming an internal sidewall, a rotor eccentrically positioned within said cavity and said rotor having a plurality of radially aligned slots at said rotor's periphery, vanes slideably positioned in said slots to slide in and out of said slots so as to seal with the cavity's internal sidewall creating vane chambers that pump dialysate through said dialysate flow path; and a third pump including a third pump motor and a third pump actuator connected to said blood flow path for pumping blood through said blood flow path, said third pump actuator including a sliding vane construction having non-deformable components including a housing having a central cavity forming an internal sidewall, a rotor eccentrically positioned within said cavity and said rotor having a plurality of radially aligned slots at said rotor's periphery, vanes slideably positioned in said slots to slide in and out of said slots so as to seal with the cavity's internal sidewall creating vane chambers that pump blood through said blood flow path; and a processor connected to said first, second and third pump motors for controlling operation of said pump motors.