The invention relates to an assistance apparatus for carrying out a first emergency care procedure such as chest compressions or pulmonary ventilation. The assistance apparatus is designed to cooperate with a second assistance apparatus for carrying out a second emergency care procedure. The assistance apparatus is characterised in that it also comprises a communication device designed to receive, from the second assistance apparatus, data relating to the second emergency care procedure, the data comprising at least one item of information, a parameter or an instruction and in that the signal-processing device is designed to process the at least one signal measured according to the received data relating to the second emergency care procedure. The invention also relates to an assistance system comprising a compression assistance apparatus and a ventilation assistance apparatus and an assistance method associated with the assistance system.
