Patent ID: 6649063
Filing Date: 2003-11-18
Classification: A61M,B01D,C02F

Abstract:
A method for performing renal replacement therapy including producing sterile replacement fluid in a renal replacement therapy unit, the method comprising the steps of;providing a renal replacement therapy unit having a filter with a membrane having a pore size smaller than a non-sterile material, the membrane separating a waste side from a clean side of the filter; a first container of a solution, the first container in fluid communication with the waste side of the filter; a second container adapted to hold sterile replacement fluid, the second container in fluid communication with the clean side of the filter; and an ultrafiltration pump in fluid communication with the first container and the second container, the pump capable of switching between a first direction that pumps fluid out of the first container and a second direction that pumps fluid out of the second container; running the pump in the first direction to pump the solution from the first container into the waste side of the filter; filtering the solution from the first container through the membrane of the filter to trap the non-sterile material on the waste side of the filter and produce sterile replacement fluid in the clean side of the filter; collecting the sterile replacement fluid that flows from the clean side of the filter in the second container; and switching the ultrafiltration pump to run in the second direction to pump the sterile replacement fluid from the second container into blood running through the clean side of the filter thereby injecting it into a patient during renal replacement therapy.