[Increasing the bronchial resistance by means of aortic occlusion in the dog]

In 11 spontaneously breathing, anesthetized dogs, suprarenal occlusion of the aorta was produced by means of a ballon-tipped catheter and maintained for 20 min. The obstruction led to an increase in O2 saturation in arterial blood (the rise in wedge pressure alters pulmonary perfusion), in aortic pressure and in bronchial resistance. Bronchial resistance could be partially diminished by inhalations of atropine or terbutalin.