Medicament preparation devices, methods, and systems
AssigneeNxStage Medical, Inc.
InventorsGoetz Friederichs, Gregory Yantz
Life of this patent
Estimating the term…
Abstract
A proportioning device includes a proportioning machine with a temperature-compensating conductivity sensor, a controller, and pump actuator. A fluid circuit is engageable with the pump actuator, has connections for a source of water and one or more medicament concentrates, and includes a mixing container. The controller is configured to mix contents of the mixing container at a first time and to sample fluid from the mixing container, to pass the samples from the mixing container through the temperature-compensating conductivity sensor at different points in time as the fluid flows from the mixing container. The controller is further configured to mix contents of the mixing container a second time if the conductivities differ by a predefined magnitude.
Claims10
An admixing device, comprising:
- a mixing machine with a controller and a pump actuator;
- the mixing machine being configured to engage with a fluid circuit that has a pumping portion configured to engage said pump actuator;
- the fluid circuit having a connector configured for connection to a source of pure water and a connector configured for connecting respectively to at least one source of medicament concentrate;
- the fluid circuit having a mixing container and a manifold line;
- the mixing machine further having a pressure sensor configured to engage with the fluid circuit to indicate a pressure of fluid in the manifold line of the fluid circuit, the manifold line having a connector configured to connect to a selected one of several different medicament user devices;
- the controller being configured to, by feedback control, control the pump actuator to maintain a respective target fluid pressure at an inlet to said selected one of several different medicament user devices;
- and
- the respective target fluid pressure corresponding respectively to a selected one of multiple different medicament user devices.
Dependencies are inferred from the claim text.