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Previous work has demonstrated that the variables in the Widmark equation that contribute most to the uncertainty of the final calculated result are the apparent volume of distribution of al-cohol (V d) and the alcohol elimination rate (β) [2, 3].
Dec 1, 2017 · The volume of distribution (Vd) for alcohol in an individual is an expression of total body water. 30 The Vd for alcohol is proportional to the lean body mass because the adipose tissue contains little water.
Jan 1, 2024 · According to Widmark’s equation, an individual’s BAC is determined by multiplying the ounces of alcohol consumed by a constant factor, 3.75 for men and 4.7 for women, and then dividing by their weight. In particular, the Widmark equation overestimates the BAC by up to 50–100% or more for cases involving heavy drinking.
Jan 1, 2019 · The Widmark equation is commonly used when blood alcohol calculations are required in forensic and legal medicine, such as in road-traffic cases and alcohol-related deaths. An important biological variable in this connection is the volume of distribution (V d) of ethanol, which is commonly
- Peter D. Maskell, A. Wayne Jones, Anne Savage, Michael Scott-Ham
- 2019
Widmark’s Equation is often expressed as follows: A x 0.8 AC = ----- x 100 W x R A = Mls of pure ethanol, 200 proof AC = Alcohol Concentration, Chemical Test W = Body weight in grams R = Water: tissue volume of distribution: 0.55 for females; 0.68 for males 0.8 = Specific gravity of ethanol
Oct 2, 2007 · While Widmark measured blood alcohol concentrations in units of mass/mass, modern analytical methods commonly report the units in mass/volume. Therefore, revisions to Widmark's equation include Ct reported in grams per liter and r (“apparent” volume of distribution) reported in liters per kilogram.
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May 18, 2020 · Abstract. The Widmark equation is used forensically for the determination of the amount of ethanol (alcohol) that may have been consumed and also to determine the blood alcohol concentration (BAC) of an individual at a specific time.
