Medical treatment system and methods using a plurality of fluid lines

A system for determining a characteristic correlated to a heightwise location of a component of interest relative to a pumping chamber of a fluid handling set, the system comprising;

• a pumping cassette including the pumping chamber and having at least a first fluid valve, and a second a fluid valve leading to a port connected to a fluid line coupled to the component of interest;
• a pressure distribution module having a control surface against which the pumping cassette is held, the pressure distribution module including at least one sensor configured to output data indicative of the pressure of the pumping chamber;
• and
• a controller configured to command the pressure distribution module to establish a path from the port to the pumping chamber, receive the data, and detect a feature profile in the data, the controller configured to predict the characteristic of the component of interest based on the feature profile and temporal data associated with the feature profile.

A method for determining a characteristic correlated to a heightwise location of a component of interest of a fluid handling set relative to a pumping chamber in a cassette of the fluid handling set, the method comprising;

• establishing a flow path from the pumping chamber to a port of the cassette coupled to a fluid line coupled to the component of interest;
• monitoring data indicative of a pressure in the pump chamber from at least one pressure sensor;
• detecting a feature profile in the data;
• and
• predicting the characteristic of the component of interest based on the feature profile and temporal data associated with the feature profile.

A method of determining a heightwise location of a component of interest relative to a pumping chamber of a fluid handling set, the method comprising:

• establishing a flow path between the pumping chamber and the component of interest;
• receiving, with a controller, data from a pressure sensor indicative of pressure in the pump chamber;
• detecting, with the controller, a feature profile in the data;
• and
• determining, with the controller, the heightwise location of the component of interest using the data and temporal data associated with the feature profile before the data indicates that the pressure in the pump chamber is stable.