Fluid preparation and treatment devices methods and systems

Patent metadata

Field	Value
Publication number	US-11207454-B2
Application number	US-201916288562-A
Country	US
Kind code	B2
Filing date	Feb 28, 2019
Priority date	Feb 28, 2018
Publication date	Dec 28, 2021
Grant date	Dec 28, 2021

Abstract

Methods, device, and systems for preparing peritoneal dialysis fluid and/or administering a peritoneal dialysis treatment are disclosed. In embodiments, peritoneal dialysis fluid is prepared at a point of use automatically using a daily sterile disposable fluid circuit and one or more long-term concentrate containers that are changed only after multiple days (e.g. weekly). The daily disposable may have concentrate containers that are initially empty and are filled from the long-term concentrate containers once per day at the beginning of a treatment.

First claim

What is claimed is:

1. A system for performing peritoneal dialysis, comprising:
a fluid circuit with a fluid inlet and a mixing container;
a peritoneal dialysis cycler having a cycler controller, actuators, including a cycler pump actuator, to direct concentrate and water selectively through the fluid circuit to transfer concentrate and water, through the fluid inlet, to the mixing container to form dialysis fluid;
a water supply source with a water pump having a purified water outlet connected to the at least one fluid inlet;
the purified water outlet having a pressure sensor and a water source controller that receives pressure signals from the pressure sensor and controls the water pump responsively to the pressure signals, the cycler pump actuator generating coded pressure pulses in said fluid inlet that are received by the pressure sensor and decoded by the water source controller to command the water source controller to activate and deactivate said water pump responsively to decoded commands encoded in said pressure signals.

2. The system of claim 1 , wherein the coded pressure pulses encode changes to operating parameters of the water source controller including a closed-loop pressure set point at said fluid inlet.

3. The system of claim 1 , wherein the coded pressure pulses encode changes to operating parameters of the water source controller.

4. The system of claim 1 , wherein the water source controller controls the water pump to maintain the pressure of the at least one fluid inlet within a predefined range of pressures.

Assignees

• Nxstage Medical Inc

Inventors

• Wyeth Mark T
• Yantz Gregory
• Mccarty Robert Paul

Classifications

• A61M2205/3569

  sublocal, e.g. between console and disposable · CPC title

• C02F2209/03

  Pressure · CPC title

• A61M1/1672

  using membrane filters, e.g. for sterilising the dialysate · CPC title

• C02F1/283

  using coal, charred products, or inorganic mixtures containing them · CPC title

• A61M2205/8212

  with means or measures taken for minimising energy consumption · CPC title