血液中酒精与呼气分配系数变化的意义。
Significance of variations in blood: breath partition coefficient of alcohol.
作者信息
Alobaidi T A, Hill D W, Payne J P
出版信息
Br Med J. 1976 Dec 18;2(6050):1479-81. doi: 10.1136/bmj.2.6050.1479.
A helium-neon laser was used to measure the alcohol content of breath from six volunteers at regular intervals over up to four hours. The corresponding blood values were calculated with a blood : breath partition coefficient of 2100. When these values were compared with those obtained by direct measurement it was obvious that substantial variations occurred from one person to another in the derived values and that even in the same person the use of the partition coefficient of 2100 led to significant differences between the direct and derived values for blood, and these differences changed with time. Thus the assertion that a constant partition coefficient of 2100 exists between alcohol in blood and that in breath is not supported by the evidence. Accordingly the use of such a partition coefficient to derive blood alcohol values for law enforcement is not justified.
使用氦氖激光对六名志愿者长达四小时的呼吸酒精含量进行定期测量。根据血液与呼吸的分配系数2100计算相应的血液值。当将这些值与直接测量获得的值进行比较时，很明显，推导值在人与人之间存在很大差异，而且即使对于同一个人，使用2100的分配系数也会导致血液直接测量值与推导值之间存在显著差异，并且这些差异会随时间变化。因此，血液酒精与呼吸酒精之间存在恒定分配系数2100这一说法没有证据支持。相应地，使用这样的分配系数来推导用于执法的血液酒精值是不合理的。
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