A monitoring device having a capnography capability employs a ventilation monitoring controller including a capnography monitor (20) and a respiration monitor (21) for determining between a non-hyperventilating ventilation being applied to a patient and a hyperventilating ventilation being applied to the patient. Tn operation, the capnography monitor (20) analyzes a capnography waveform of the patient. The respiration monitor (21) determines the non-hyperventilating ventilation being applied to the patient based on an indication by an end-tidal carbon dioxide expired by the patient and/or a respiratory rate of the patient derived, partially or entirely, from the analysis of the capnography waveform by the capnography monitor (20), and determines the hyperventilating ventilation being applied to the patient based on a collective indication by both the end-tidal carbon dioxide expired by the patient and the respiratory rate of the patient derived, partially or entirely, from the analysis of the capnography waveform by the capnography monitor (20).
