Feldschuh J, Enson Y
Circulation. 1977 Oct;56(4 Pt 1):605-12. doi: 10.1161/01.cir.56.4.605.
Predictions of blood volume (BV) assume the existence of a constant ratio between BV and body weight or surface area (SA). We examined the validity of this assumption by calculating BV from plasma volume and body hematocrit in 160 normal volunteers whose weights ranged from -38.7 to 210.8% of desirable weight (assessed by a modification of the Metropolitan Life Insurance Company Desirable Weight tables). BV is not a constant fraction of body weight or SA in this population. Its prediction from such constant ratios results in a large error of estimate which is systematically biased with respect to height and weight. BV prediction from the observed regressions of the parameter on weight and SA reduces the error substantially but remains biased with respect to height. BV prediction from the subject's degree of deviation from desirable weight affords a smaller error of estimate which is apparently free from systematic bias.
血容量（BV）的预测假设BV与体重或体表面积（SA）之间存在恒定比例。我们通过计算160名正常志愿者的血浆容量和身体血细胞比容来检验这一假设的有效性，这些志愿者的体重范围为理想体重的-38.7%至210.8%（通过对大都会人寿保险公司理想体重表进行修改来评估）。在这一人群中，BV并非体重或SA的恒定比例部分。根据这种恒定比例进行的BV预测会导致较大的估计误差，且该误差在身高和体重方面存在系统性偏差。根据该参数与体重和SA的观察回归进行的BV预测可大幅降低误差，但在身高方面仍存在偏差。根据受试者偏离理想体重的程度进行的BV预测产生的估计误差较小，且显然没有系统性偏差。
