The present invention proposes another woven moisture sensor having at least one printed conductor for monitoring a patients vascular access for blood loss to the surroundings, in particular for use in an extracorporeal blood treatment.The inventive moisture sensor has a monitoring section of the printed conductor which is produced by weaving, which is a high-resistance terminating resistor in a first embodiment and in a second embodiment is a tongue of the moisture sensor, which is provided and configured for cutting out the moisture sensor.
