System, sensor and method for monitoring health related aspects of a patient

A device for monitoring a patient in order to detect undesirable events or conditions, comprising:

• a processor configured to receive sensor data including a first input signal which is a reflected return signal from an UWB radar which has been changed relative to a transmitted radar signal or where time difference between the transmitted and the received radar signal has been changed by the patient's motion, and to derive data representative of the patient's motion from said changes in the first input signal;
• a memory;
• a pattern recognition model stored in said memory and enabling said processor to perform pattern recognition processing of the data derived from said first input signal and to detect and classify patterns in said data derived from said first input signal as indicative or predictive of an undesirable event or condition in a patient within a field of view of said UWB radar;
• a communication interface;
• wherein said processor is configured to:
• transmit an alarm message over said communication interface when a pattern is classified as indicative or predictive of an undesirable event or condition in said patient;
• create a log of data derived from said first input signal and associated with a detection of a pattern classified as indicative or predictive of an undesirable event;
• process, at intervals, said log using a machine learning algorithm to create an updated pattern recognition model.