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肺动脉平均压(PPA)与肺阻抗微分图(DIR)的Q-B时相相关,也与DIR的速率缓慢部分的时相相关,静息状态下测得PPA与CP_2/Cy,Qy/yQ的复相关系数R=0.6736,求得推算PPA的回归方程为: Y=-4.5444+0.2574X1+3.5111X4…………(1) PPA实测值与此方程推算的PPA理论值相比,误差≤2mmHg,占35.7%,≤4mmHg占82%,≤6mmHg占92.8%,最大误差8.9mmHg.静息与抬腿状态下测得PPA与CP_2/Cy、Qy/yQ的复相关系数R=0.6689,求得推算PPA的回归方程为: Y=0.3745X1+2.7196XⅣ-11.2382………………(2) PPA实测值与此方程推算的PPA理论值相比,误差≤2mmHg占42.8%,≤4mmHg占75%,≤6mmHg占85.7%,最大误差9.2mmHg
The mean pulmonary artery pressure (PPA) correlates with the QB phase of the lung impedance differential graph (DIR) and also with the phase of the slow part of the DIR, with the complex correlation of PPA with CP_2 / Cy and Qy / yQ measured at rest Coefficient R = 0.6736, obtained regression PPA regression equation is: Y = -4.5444 +0.2574X1 + 3.5111X4 (1) The measured value of PPA PPA theoretical value calculated by this equation, the error ≤ 2mmHg, accounting for 35.7%, ≤4mmHg accounted for 82%, ≤6mmHg accounted for 92.8%, the maximum error of 8.9mmHg. Rest and leg measured measured PPA and CP_2 / Cy, Qy / yQ complex correlation coefficient R = 0.6689, obtained estimated PPA The regression equation is: Y = 0.3745X1 + 2.7196XIV-11.2382 (2) Compared with the PPA calculated by this equation, the measured value of PPA is less than 2mmHg, accounting for 42.8%, less than 4mmHg, accounting for 75% ≤ 6mmHg 85.7%, the maximum error of 9.2mmHg