A modular monitoring and ventilation system comprising: - a standalone Edi monitor for monitoring a signal reflecting an electrical activity of a diaphragm of a patient, configured to receive from at least one bioelectric sensor at least one bioelectric signal indicative of an Edi signal representative of the patient's efforts to breathe, and to display information related to said signal on a display of the Edi monitor, and - a portable standalone pneumatic unit for ventilatory treatment of a patient through the supply of breathing gas, which standalone pneumatic unit, when operated separately, is incapable of providing neurally adjusted ventilatory assist (NAVA) treatment to the patient; wherein the Edi monitor and the pneumatic unit are configured to be put in a paired state in which they are communicatively connected to each other in order to exchange information and to cooperate to provide NAVA treatment to the patient by controlling the operation of the pneumatic unit based on said at least one bioelectric signal indicative of the Edi signal, received by the Edi monitor from said at least one bioelectric sensor, such that a proximal pressure substantially corresponding to an airway pressure of the patient is adjusted in dependence of the Edi signal, wherein the Edi monitor, when paired with the pneumatic unit, is configured to receive, from said pneumatic unit, information related to an ongoing ventilatory treatment of the patient provided by the pneumatic unit, and associatively display, on the display of the Edi monitor, information related to the bioelectric signal indicative of the Edi signal and said information received from the pneumatic unit and relating to the ongoing treatment of the patient, wherein the information received from the pneumatic unit comprises a pressure signal representing said proximal pressure, the Edi monitor being configured to associatively display, in a common frame of reference, a graphical representation of an Edi signal derived from the bioelectric signal and a graphical representation of the pressure signal representing said proximal pressure. - a standalone Edi monitor for monitoring a signal reflecting an electrical activity of a diaphragm of a patient, configured to receive from at least one bioelectric sensor at least one bioelectric signal indicative of an Edi signal representative of the patient's efforts to breathe, and to display information related to said signal on a display of the Edi monitor, and - a portable standalone pneumatic unit for ventilatory treatment of a patient through the supply of breathing gas, which standalone pneumatic unit, when operated separately, is incapable of providing neurally adjusted ventilatory assist (NAVA) treatment to the patient; wherein the Edi monitor, when paired with the pneumatic unit, is configured to receive, from said pneumatic unit, information related to an ongoing ventilatory treatment of the patient provided by the pneumatic unit, and associatively display, on the display of the Edi monitor, information related to the bioelectric signal indicative of the Edi signal and said information received from the pneumatic unit and relating to the ongoing treatment of the patient, wherein the information received from the pneumatic unit comprises a pressure signal representing said proximal pressure, the Edi monitor being configured to associatively display, in a common frame of reference, a graphical representation of an Edi signal derived from the bioelectric signal and a graphical representation of the pressure signal representing said proximal pressure.