M. Rozanek, Z. Horakova, and K. Roubik (Czech Republic)
Artificial lung ventilation, lung simulator, airwayresistance, intrapulmonary conditions.
Changes in respiratory mechanics can affect the efficiency of artificial lung ventilation substantially. Therefore, experimental measurement was made to study intrapulmonary pressure during changed mechanical properties of the respiratory system for spontaneous breathing and for use of conventional ventilation and high-frequency ventilation. Lung simulator ASL5000 was used to study interaction between the pulmonary mechanics and intrapulmonary conditions. Ventilators Veolar from the Hamilton company and 3100B from Sensormedics company were used while studying conventional ventilation and high-frequency ventilation. It was possible to maintain constant tidal volume during conventional ventilation for increased airway resistance with small increase in dynamic pressure. On the other hand, the dynamic pressure was substantially increased during high-frequency ventilation when the airway resistance was increased. The respiratory mechanics has a direct effect on the intrapulmonary conditions and it affects the efficiency of different ventilatory regimens. Conventional ventilation seems to be gentler to the respiratory system while ventilating lung with increased airway resistance.
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