Simulation is the safest way to test something. Unfortunately simulation is never as realistic as the original. Simulating a breathing human lung leads to a high effort, either in computational power or in the complexity of the design. One of the most reliable possibilities to simulate a human lung is to use a mechanical lung simulator. The i-Lung offers the possibility to simulate a human lung either using a Latex bag or using a porcine lung. The latter provides an internal structure which is very similar to the human lung. The i-Lung model allows the simulation of physiological breathing as well as the simulation of the 5 most important pathological breathing patterns. Using the i-Lung in the project AlveoPic increases its importance as possible alternative to animal models, as the used porcine lungs are taken from a routine slaughtering process.