Canizaro P C, Nelson J L, Hennessy J L, Bright P B
Ann Surg. 1974 Sep;180(3):364-7. doi: 10.1097/00000658-197409000-00018.
A nomogram was constructed which allows estimation of the P(50) value from the Po(2) and per cent O(2) saturation of a single venous blood sample. There was excellent correlation between 50 estimated P(50) values obtained in 27 severely ill patients when compared with P(50) values determined from constructed OH-DC's (correlation coefficient 0.92). The mean of the differences between the estimated and determined P(50) values was 1.5 mm Hg with a standard deviation of +/-1.1, and the maximum difference was 4 mm Hg.
构建了一个列线图，可根据单个静脉血样本的氧分压（Po₂）和氧饱和度估算P(50)值。与通过构建氧离曲线（OH-DC）确定的P(50)值相比，27例重症患者获得的50个估算P(50)值之间具有极佳的相关性（相关系数为0.92）。估算的和确定的P(50)值之间差异的平均值为1.5 mmHg，标准差为±1.1，最大差异为4 mmHg。
