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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.
Muscles in the chest wall & diaphragm are relaxed and the respirator must generate a pressure in the alveoli that will overcome the elastic recoil of the total respiratory system. Total respiratory system: includes the lungs + diaphragm + chest wall. (similar to inflating two balloons inside each other).