A study on wheeze models

摘要

In this paper, the finite differenee schemes for the linear and nonlinear models of wheezes are given. The waveform of wheczes is analysed. It is shown that the numerical results of the lincar model of wheezes and Grotberg’s theorehcal results coincide well. The numerical results of the nonlincar model of wheczes are in qualita tive agreement with our expcrimental observations. It is suggested that the nonlinear elastance coefficient (β) causes damping, and is closely related to the flow limitation and the airway collapse. Wheezes result from the interachon between the fluid forces and the wall forces and the airway wall flutter is a forced-vibration, rather than a self vibration.