Abstract: A system and a method for detection of a respiratory status, wherein the system comprises a flexible patch being configured to be affixed to the skin of a patient's body, wherein the patch has at least one sensor arrangement for sensing a body activity of the patient's body when the patch is affixed to the skin, and wherein the sensor arrangement is configured to determine and/or output a sensor signal corresponding to said body activity. The system is configured to determine a respiratory airflow indicator based on the sensor signal. Alternatively, or additionally, the system has a re-usable add-on device that is attachable to and detachable from the patch and is adapted to provide energy to and/or receive the sensor signal from the patch.