- ページ 3

試験装置 AlcoSense ELITEのPDF 取扱説明書をオンラインで閲覧またはダウンロードできます。AlcoSense ELITE 20 ページ。

Contents

How Breathalysers Work

Breathalysers work by measuring the concentration of alcohol vapour in

your breath. Contrary to popular belief the alcohol is not coming from

residue in your mouth but is actually evaporating from the blood that passes

through your lungs when you breathe. The amount of alcohol evaporating

from your lungs is directly proportional to the amount of alcohol in your

blood stream making it possible to accurately calculate the per mil Blood

Alcohol Concentration (‰BAC) or Milligrams of alcohol per Litre of Breath

(mg/l) and therefore your level of intoxication.

How Alcohol Is Processed by the Body

When you drink, alcohol is absorbed into the blood stream through your

mouth and throat but mostly through the stomach and small intestine. The

more you drink the more alcohol is absorbed by the body and the higher

your BAC or mg/l reading will become. Approximately 90 minutes after the

alcohol is consumed it is distributed equally around the body through the

blood stream. This is known as the point of Equilibrium.

As blood flows round the body around 90% of the alcohol it contains

is broken down in to water and carbon dioxide by the liver in a process

called Oxidation. The remaining 10% of the alcohol is passed from the

body through the lungs and kidneys. A healthy liver typically breaks down

alcohol at a rate of one unit of alcohol per hour but the more alcohol that is

consumed the longer it can take for the liver to process each unit.

When you stop drinking your level of intoxication may stay constant or if you

have been drinking heavily it could even increase for around 2 hours afterwards.