Testing of a medical fluid treatment system

A method for detecting a failure in a system for providing a medical treatment to a patient, the system including a fluid pathway in removable fluidic communication with the patient, a pump, an occlusion element for the fluid pathway, and a sensor for measuring a pressure in the fluid pathway, the pump and the sensor operatively connected to an electronic processor, the pump configured to move a fluid through the fluid pathway, the system configured to infuse or remove the fluid to or from the patient via the fluid pathway, the method comprising the steps of:

• blocking the fluidic communication between the patient and the fluid pathway after the medical treatment is completed;
• performing a test to detect an operational failure of the system, the performing the test including,
• actuating the pump,
• measuring a pressure by the sensor in the fluid pathway,
• monitoring the measured pressure by the electronic processor,
• determining by the electronic processor whether the operational failure is present based on the monitored pressure,
• stopping the pump when at least one of the monitored pressure reaches a predetermined threshold, a number of pump stroke reaches a predetermined value, and a duration of the test reaches a predetermined time value;
• and
• determining the operational failure of the system when the pump is stopped before the measured pressure has reached the predetermined threshold.