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Alcohol level

Designation (BAK) for the amount of alcohol contained in venous blood, expressed in milligrams per gram or per thousand (1 per thousand = 1 g alcohol in 1 kg blood or 1 mg/g). It is measured in serum (blood without blood cells and coagulation factors) and converted to blood content. The enzyme ADH (alcohol dehydrogenase) is used to determine the blood alcohol content. In 1922, the Swedish chemist Erik Widmark (1889-1945) developed the "Widmark's formula", named after him, for determining BAK. In addition to Widmark's formula, there are other calculation methods (Seidel, Ullrich, Watson) named after the "inventors", which take into account body weight and sex as well as body length and age. The Widmark formula is used as a basis for electronic BAK determination devices. With the help of this formula, the blood alcohol content can be calculated with an accuracy of plus/minus 0.1 per thousand: c = A / (r * G)

  • c: blood alcohol content in per mille
  • A: alcohol ingested in grams
  • r: Distribution factor in the body (water in the body) = 0.7 for men and 0.6 for women
  • G: body weight in kilograms

Since alcohol...

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