Patent ID: 9662430
Date: 2017-05-30
CPC Classifications: A61M

Claim:
1. A method of conveying fluids to a filter unit of a medical treatment apparatus, the medical treatment apparatus comprising a device including a recirculation unit and a balancing unit, the recirculation unit comprising first and second recirculation chambers and the balancing unit comprising first and second balancing chambers, wherein fresh fluid is balanced against used fluid in the balancing unit, the method comprising: continuously conveying, via the recirculation unit, (1) fresh fluid out of the first recirculation chamber and into and through the filter unit to form used fluid, (2) the used fluid out of the filter unit and into the second recirculation chamber, and (3) the used fluid out of the second recirculation chamber, into the filter unit, out of the filter unit, and into the first recirculation chamber, wherein the fresh fluid and the used fluid are conveyed through the filter unit in a same direction and independently of fluid flow through the balancing unit; and conveying, via the balancing unit, (1) fresh fluid out of the first balancing chamber and into and through the filter unit to form used fluid, and (2) the used fluid out of the filter unit and into the second balancing chamber, wherein a fluid flow rate of the used fluid flowing out of the filter unit is independent of a fluid flow rate of the used fluid flowing into the balancing unit and the fluid flow rate of the fresh fluid flowing out of the balancing unit, and wherein the device is configured to maintain a continuous flow rate of fluid through the filter unit if the fluid flow rate of the fresh fluid flowing out of the balancing unit is discontinuous.