[The ventilation-perfusion process in the lungs following inhalation administration of 133Xe].

A study of the ventilation-perfusion process in 33 patients with various pulmonary diseases has shown the advantages of 133Xe administration by inhalation over i.v. administration. This method for the study of the ventilation-perfusion process in the lungs adequately reflects pathological changes in them; it is not traumatic, easy to perform and permits one to considerably lessen the radiation exposure of the patient and the staff.