当前位置： SCI文献检索 > FORENSIC SCIENCE INTERNATIONAL期刊下所有文献 > Total body water is the preferred method to use in forensic blood-alcohol calculations rather than ethanol's volume of distribution.

Total body water is the preferred method to use in forensic blood-alcohol calculations rather than ethanol's volume of distribution.

Abstract：

:During the prosecution and defence of drink-driving cases, forensic practitioners are often required to engage in various blood-alcohol calculations, such as whether or not the statutory limit was exceeded (e.g. 80mg/100mL, 0.08g/100mL or 0.80g/L). For this purpose, most forensic scientists utilize the Widmark equation, or some modification thereof, to calculate a person's blood alcohol concentration (BAC) based on information about the amount of ethanol consumed and the pattern of drinking. This equation comes in two main forms; one of which incorporates the apparent volume of distribution of ethanol (V) and the other a person's total body water (TBW). In this study, we utilised two independent data sets, one involving the determination of V for ethanol in 173 men and 63 women, and the other TBW determined for 582 men and 884 women. Those subjects included in the TBW group represented various racial groups (Caucasians, African Americans, Hispanics, Asians and Puerto Ricans), with body mass index (BMI) ranging from 17 to 80kg/m2. Both versions of the Widmark equation were evaluated in relation to their accuracy and precision in predicting TBW and/or V using the two most common anthropometric equations; those of Watson et al. and Forrest. Both anthropometric equations exhibited good accuracy (<4.3%) for the prediction of both TBW and V. However, the root mean square error was lower TBW was used for prediction (9.09-12.84%) rather than V (11.72-15.08%). Overall, this study has demonstrated (a) that blood-alcohol calculations are more reliable using TBW rather than V (b) that both equations (Watson et al. and Forrest) are applicable to ethnic groups other than Caucasians and (c) the Forrest equation predicts TBW in men and women with BMI from 17 to 35kg/m2 and that the Watson et al. equation works for those with more extreme BMI; females (17-80kg/m2) and males (17-67kg/m2).

journal_name

Forensic Sci Int

journal_title

Forensic science international

authors

Maskell PD,Jones AW,Heymsfield SB,Shapses S,Johnston A

doi

10.1016/j.forsciint.2020.110532

subject

Has Abstract

pub_date

2020-11-01 00:00:00

pages

110532

eissn

0379-0738

issn

1872-6283

pii

S0379-0738(20)30394-7

journal_volume

316

pub_type

杂志文章

在线工具

Total body water is the preferred method to use in forensic blood-alcohol calculations rather than ethanol's volume of distribution.