[Unequal ventilation: phenomenon of trapped helium].
The results of preliminary research designed to prepare a method for using mouth measurements to identify alveolar air trapping phenomena which cannot be detected by normal techniques are reported. With a present rapid thermoconductivity CO2/He analyser, it was shown that even after the completion of a standard He wash-out process, it is possible to reveal the persistence in the expiratory air of bronchiolostenotic patients of residual traces of inert gases alongside CO2 originating from normally ventilating sectors. The information obtained from the mouths of patients corresponds with the results of measurements taken inside the lung. Finally it is shown that with adequate therapy the trapping phenomenon may be reversed.
D001249:Asthma / Q000503:physiopathology; D001991:Bronchitis / Q000503:physiopathology; D006371:Helium; D006801:Humans; D010101:Oxygen Consumption; D011650:Pulmonary Alveoli / Q000503:physiopathology*; D013814:Thermal Conductivity; D014692:Ventilation-Perfusion Ratio
D006371:Helium
Ventilazione ineguale: fenomeno dell'He intrappolato