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Common procedures used to evaluate the respiratory muscles are maximum inspiratory pressure and maximum expiratory pressure. However, there is little consensus concerning these methods.ommon procedures used to evaluate the respiratory muscles are maximum inspiratory pressure and maximum expiratory pressure. However, there is little consensus concerning these methods.
A bi-level CPAP system delivers two different positive pressure levels--an inspiratory positive airway pressure, or IPAP, and an expiratory positive airway pressure, or EPAP The difference between these two pressure levels is commonly referred to as the pressure support.