An apparatus for altering the mechanical load of the respiratory system.

@article{Younes1987AnAF,
  title={An apparatus for altering the mechanical load of the respiratory system.},
  author={M. R. Younes and D Bilan and Dieter Jung and H Kroker},
  journal={Journal of applied physiology},
  year={1987},
  volume={62 6},
  pages={2491-9}
}
We describe an apparatus for altering the mechanical load against which the respiratory muscles operate in humans. A closed system incorporates a rolling seal spirometer. The spirometer piston shaft is coupled to a fast-responding linear actuator that develops force in proportion to desired command signals. The command signal may be flow (resistive loading or unloading), volume (elastic loading or unloading), constant voltage (continuous positive or negative pressure), or any external function… CONTINUE READING