Apparatus and method for monitoring of a body function and/or a body property

The invention relates to an apparatus for monitoring of a body function and/or a body property of a patient comprising a sensor (3) which determines measurement values with regard to the body function and/or the body property, a unit (5) for detecting a critical condition of the respective body function and/or body property based on the measurement values, a unit for providing alert information to the patient (7,8) in case a critical condition is detected,preferably optically and/or acoustically, an acknowledgement unit (11) for acknowledging the critical condition and a transmitter for transmitting information with regard to the corresponding body function and/or body property, for example an emergency signal and/or a position information, wherein the transmitter is only activatable in the case, in which after a predefined time period from the detection of the critical condition the acknowledgement unit (11) has not been operated.