论文部分内容阅读
本文从肺阻抗血流图理论和心导管的若干实验事实出发,导出了二种由肺阻抗血流图计算肺动脉收缩压的方法——肺泡加压法和坐卧法。给出了应用这两种方法计算肺动脉收缩压的公式。通过18例矽肺病人将阻抗法估算的压力值与创伤性的心导管测量值作对照,两种方法与心导管测量结果高度相关,相关系数分别为0.81和0.84,P<0.005。两种阻抗法估算结果与心导管测压值间的回归方程分别为=0.817P_A+7.64和=1.126P_(A2)-5.35。本文还讨论了这两种方法的测量误差和适用范围。坐卧法的误差一般较小,但实测结果表明两种方法在统计学上无差异。
Based on the theory of pulmonary impedance blood flow and some experimental results of cardiac catheterization, two methods of calculating pulmonary arterial systolic pressure from pulmonary impedance blood flow graph are presented-alveolar pressurization and sit-rest method. The formulas for calculating the pulmonary artery systolic pressure using these two methods are given. Eighteen patients with silicosis compared the pressure values estimated by the impedance method with traumatic cardiac catheterization. Both methods were highly correlated with cardiac catheterization, with correlation coefficients of 0.81 and 0.84, respectively, P <0.005. The regression equations between the two impedance methods and the cardiac catheterization were 0.812P_A + 7.64 and 1.126P_ (A2) -5.35, respectively. This article also discusses the measurement error and the applicable range of these two methods. Sit-in error is generally small, but the measured results show that there is no statistical difference between the two methods.