‘Electrical leak detection system’ to detect abnormal conduction within a catheter in the presence of electrical interferers

A method of distinguishing between a leak signal arising from a leak in a catheter and an interfering signal arising from an electrical interferer, the method comprising:

• transmitting a test signal to a leak detection circuit of the catheter within the catheter, the test signal having multiple component signals injected simultaneously, each component signal being at a different frequency with a known amplitude;
• receiving from the leak detection circuit a response signal arising from modulation of the test signal by an environment within the catheter;
• and
• distinguishing between a leak and an electrical interferer based on an evaluation of the response signal by passing the response signal through a filter configured to pass the response signal at one of the different component signal frequencies and filter out other frequencies of the different component signal frequencies.