Methods and devices for creating collateral channels in the lungs

(57) Summary book invention changes the gas flow in a lung, and relates to a method and a device which improve the expiration cycle of an individual (individual which has a chronic obstructive pulmonary disease (COPD) especially). More, a method and a device produce a side secondary opening or a channel through a respiratory tract wall, and it is indicated by details in order to carry out 除 pressure of/or the lung which expanded superfluously by maintaining, as a result expiration's passing directly from lung tissue and finally promoting the oxygen exchange to both of blood. The method of the present invention includes the action which improves the gas flow in the lung of a disease state according to the process of changing the gas flow within a lung. The variation of the present invention includes the action which produces the action which chooses the part for side secondary ventilation of the lung of a disease state, and at least 1 side subchannel in the part.