Methods and devices to improve lung function in a patient having restricted ventilation. The device may include an implantable airway bypass device that relieves trapped air. The method may include a treatment procedure that minimizes irritation of tissue to control healing processes. Systems, methods and devices have been conceived and are disclosed herein for improving the mechanics of a diseased lung of a patient by implanting one or more natural airway bypass ventilation devices in a lung. For example, the patient may suffer from COPD, emphysema, chronic bronchitis, or asthma. A natural airway bypass device may comprise a pressure relief device connecting lung parenchyma distal to abnormally high resistance airways to the atmosphere.Procédés et dispositifs pour améliorer la fonction pulmonaire d'un patient à ventilation limitée. Le dispositif peut comprendre un dispositif implantable de dérivation des voies aériennes qui libère l'air piégé. Le procédé peut comprendre une procédure de traitement qui réduit au minimum l'irritation de tissus pour réguler des processus de guérison.
