[Quantitative relation between plethysmographic parameters and pulmonary artery pressure in obliterative pulmonary...

32 cases of obliterative pulmonary vascular disease were studied by comparing, the results of pulmonary impedance plethysmogram (PIP) and hemodynamic parameters obtained by catheterization. It is shown that the main PIP feature of obliterative pulmonary vascular disease is a delayed peak of delta Zmax, and QZM is correlated with pulmonary artery pressure. Two sets of regression equations were established with parameters of PIP for the estimation of pulmonary artery pressure in obliterative pulmonary vascular disease.