Medical device leak sensing devices, methods, and systems

An apparatus for performing a blood treatment, comprising:

• a blood pump constructed to pump blood to a patient through a first blood line of a fluid circuit;
• a pressure sensor coupled to the first blood line for measuring a pressure therein;
• one or more accelerometers connected to the fluid circuit and configured to detect accelerations of at least one of the patient and portions of the fluid circuit;
• and
• a control module configured to generate a first signal indicating a probability of a leak in the first blood line responsively to a predefined change in the pressure in the first blood line as measured by the pressure sensor, wherein
• the control module is further configured to inhibit generation of the first signal when the predefined change in the pressure is detected contemporaneously with an acceleration detected by the one or more accelerometers.