Patent ID: 8267885
Filing Date: 2012-09-18
Classification: A61M

Abstract:
1. An apparatus for delivering peritoneal dialysis (PD) solution from a supply to a patient, comprising A. a piezoelectric (“piezo”) pump that comprises a piezoelectric sensor, the piezo pump being in fluid coupling with a supply of PD solution and configured to pump PD solution from the supply to a mesne measuring element that includes a chamber, the piezo pump generating signals indicative of a volume of the PD solution pumped by it where those signals are indicative of a degree and direction of bending of the at least one piezoelectric sensor, B. the mesne measuring element, in fluid coupling with the first pump, generating signals indicative of a volume of PD solution within the chamber, and C. a second pump, fluidly coupled to the mesne measuring element, that routes PD solution from the mesne measuring element for delivery to the patient, wherein the second pump comprises a peristaltic pump, D. one or more processors in communications coupling with the piezo pump and the mesne measuring element, wherein the one or more processors determine a volume of PD solution delivered to the patient as a function of the volume-indicative signals generated by any of the piezo pump and the mesne measuring element.