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本文通过17例矽肺肺气肿病人右心导管与肺阻抗血流图同步对比观察,认为构成肺阻抗血流图各种病理变化的主要参量—波幅高欧姆值与肺动脉脉压差密切相关。两者随呼吸周期变化的相关性,肺动脉高压组γ为0.776P<0.01、肺动脉压正常组γ为0.608 P<0.01,与导管测得的肺动脉脉压差的回归方程分别为=51.1(波高欧姆值)+4.8与=38.08(波高欧姆值)+6.648。 应用肺泡加压造成肺动脉平均压升高、脉压差缩小,此时两者的相关系数 γ为0.65P<0.01,与肺动脉压差的回归方程=38.4(波高欧姆值)+3.59。个体呼吸周期、肺泡加压后动态观察,两者相关性分别在0.87～0.99之间,认为肺阻抗血流图波高欧姆值不取决于肺动脉压的绝对高度,而与肺动脉的脉压差密切相关,但个体间相关斜率不一致,提出目前测试方法较难划分肺阻抗血流图波幅高的异常值。
In this paper, 17 patients with silicosis emphysema right heart catheterization and pulmonary impedance blood flow diagram synchronization comparison, that constitute the main parameters of pulmonary impedance blood flow diagram of a variety of pathological changes - high amplitude and high pulmonary arterial pressure is closely related to pulse pressure. The relationship between the two changes with the respiratory cycle, pulmonary hypertension group γ 0.776P <0.01, pulmonary arterial pressure normal group γ 0.608 P <0.01, and catheter measured pulmonary artery pressure differential equation = 51.1 (wave high ohm +4.8 and = 38.08 (Wave High Ohms) +6.648. Pulmonary pressure increased with the increase of pulmonary artery pressure and pulse pressure decreased. The correlation coefficient γ was 0.65P <0.01, and the regression equation with pulmonary pressure difference was 38.4 (wave height ohm) +3.59. Individual respiratory cycles, dynamic observation after alveolar pressurization, the correlation between the two 0.87 to 0.99, that the pulmonary impedance blood flow diagram of high-ohm does not depend on the absolute height of pulmonary artery pressure, pulse pressure and the pulmonary artery is closely related to the poor , But the correlation between the individual inconsistencies, proposed that the current test method is more difficult to divide the abnormal impedance value of pulmonary impedance blood flow diagram.