Studies on the lung compliance

I．　INTRODUCTION

　It has long been acknowledged that the lung　has it's proper elastic property．　Many inves—tigators had invented their own methods to　estimate and interprete the elastic property　of the lung by their own way of their　methods．　To evaluate pulmonary functions，　it is one of important things to understand　such characteristics of lungs．　Sometimes，　changes in the elastic properties of the lungs　become important factor in determining the　pulmonary disability．　One of those methods，　there is compliance test．　Lung compliance　which is used at first by v．　Neergaard, is　considered in general to express elasticity oflungs．