Monitoring device articulate a patient

The invention describes a device (1) monitoring of one or more joints of a patient, comprising: at least two units (2) hinged configured for attachment to the skin (101) of the patient on two bone elements (100) of the joint to be monitored, so that the movements of said two units (2) hinged essentially correspond to the movements of said bone elements (100); at least one sensor (3) connected to the two units (2) articulated to detect the angle between said two units (2) hinged together; and alarm means configured to output a warning signal if the detected angle exceeds a maximum threshold. The invention may comprise a means (4) interface to set the maximum threshold angle detected.