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本文通过肺动脉压波法与肺阻抗血流图法同步测量18例矽肺肺气肿病人的右心收缩间期,并作了对比分析,认为两者有极好相关性。右心室射血前期(RPEP)时间(秒)与阻抗图的q—B时间(秒)相关系数r为0.96=1.1x-0.02,右心室射血期(RVET)时间(秒)与阻抗图 B—y时间(秒)相关系数为0.99,其回归方程为=0.69 x+0.04。并进一步分析了其中10例肺动脉平均压正常范围的矽肺肺气肿病人,应用肺泡加压法造成急性肺动脉高压时q—B,B—y时间(秒)与肺动脉平均压的相关性,r分别为0.785与0.95,与导管测得的肺动脉平均压的回归方程为=210 x-1.34与=140x-28.25。认为应用非侵入性的肺阻抗血流图与心电、心音同步分析,能和侵入性肺动脉压波法一样了解右心功能状态,并能大致衡量肺动脉平均压的高低。
In this paper, pulmonary hypertension and pulmonary impedance spectroscopy were used to measure the right ventricular systolic interval in 18 patients with emphysematous silicosis. The contrastive analysis was made between the two groups. The correlation coefficient r between the right ventricular ejection fraction (RPEP) time and the impedance profile q-B time (second) was 0.96 = 1.1x-0.02. The RVET time The correlation coefficient of -y time (second) was 0.99 and the regression equation was = 0.69 x + 0.04. The correlation between q-B, B-y time (sec) and mean pulmonary artery pressure was also analyzed in 10 patients with silicosis and pulmonary emphysema with average pressure normal range of pulmonary artery. Was 0.785 and 0.95, respectively, and the regression equation of mean pulmonary artery pressure measured with catheter was 210 × -1.34 and = 140 × -28.25. That the application of non-invasive pulmonary impedance cardiogram and ECG, heart sound synchronization analysis, and invasive pulmonary artery pressure wave method to understand the right heart function state, and can roughly measure the level of pulmonary artery pressure.