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Impact of strain imposed by each Ptm p-p amplitude on percent recovery of a statically constricted airway. Ptm oscillations applied above an FRC of 1 cmH2O resulted in about twice the strain and bronchodilation as the same sized Ptm oscillation imposed above a normal FRC of 5 cmH2O. Degree of recovery from a statically constricted airway is proportional to strain imposed by the Ptm oscillations (R2 = 0.99).
