INOmax synes at øge det partielle, arterielle ilttryk (PaO2) ved at dilatere pulmonale kar i bedre ventilerede områder af lungerne, og derved flytte det pulmonale blodflow bort fra lungeregioner med lave ventilations - / perfusions- ratioer (V/ Q- ratioer) mod områder med normale ratioer.
INOmax appears to increase the partial pressure of arterial oxygen (PaO2) by dilating pulmonary vessels in better ventilated areas of the lung, redistributing pulmonary blood flow away from lung regions with low ventilation/ perfusion (V/ Q) ratios toward regions with normal ratios.