闭塞性肺动脉高压的肺阻抗血流图

Pulmonary Impedance Plethysmographic Features of Obliterative Pulmonary Hypertension

分析32例闭塞性肺动脉高压的肺阻抗血流图资料,并与右心导管检查相对照,结果表明闭塞性肺动脉高压的肺阻抗基本波形为多峰递增波,波峰延迟为其主要特点,延迟的程度与肺动脉压呈正相关。

Pulmonary impedance plethysmography (PIP) has been used for the diagnosis of cor pulmonale secondary to COPD for about ten years. But the PIP features of obliterative pulmonary hypertension (OPH) have not yet been reported. We carried out a comparative study between PIP and hemodynamics determined by catheterization, in which 32 cases of OPH were studied. The results showed that the PIP features of OPH included a delayed △ Zmax peak, and the QZM interval had a positive linear correlation with pulmonary arterial pressure (r = 0.67,P<0.0001). According to electric field theory, it was supposed that this phenomenon might be due to narrowed pulmonary arterioles which limit the blood flow.