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What Affects a Driver's b.a.c. |
Drunk driving/ driving under the influence/ DUI, DWI, OWI/
Operating while intoxicated generally refer to the same crime.
Wisconsin Statute 346.63 defines the crime as: 346.63 Operating
under influence of intoxicant or other drug. 346.63(1) (1) No
person may drive or operate a motor vehicle while: 346.63(1)(a)
(a) Under the influence of an intoxicant, a controlled
substance, a controlled substance analog or any combination of
an intoxicant, a controlled substance and a controlled substance
analog, under the influence of any other drug to a degree which
renders him or her incapable of safely driving, or under the
combined influence of an intoxicant and any other drug to a
degree which renders him or her incapable of safely driving; or
346.63(1)(am) (am) The person has a detectable amount of a
restricted controlled substance in his or her blood.
346.63(1)(b) (b) The person has a prohibited alcohol
concentration.
When a driver in Wisconsin is arrested for drunk driving, unless
there is a refusal by the driver to give a test of his breath,
blood, or urine, a critical factor in the case will be the test
of the driver's blood alcohol level, and factors that affect his
blood alcohol. There are many things that affect the absorption,
processing, and elimination of alcohol levels and may influence
the results of a driver's b.a.c. test. Because of this, it is
important to hire a criminal defense attorney that is familiar
with drunk driving laws and defenses. There are several good dui
attorneys in Madison, Wisconsin that are very familiar with
drunk driving defense.
Some factors that will influence a driver's blood alcohol level
through rate of absorption include:
1. Physical features such as size of a person's stomach lining:
Since the surface area of a stomach lining is small, the amount
of alcohol absorbed in this manner is usually only 20-25%. The
remaining amount is absorbed in the small intesting which has a
larger surface area and larger blood supply.
2. Type of alcohol ingested: Absorbtion of alcohol is greatly
affected by the type of drink consumed. For example- diluted
drinks take longer to absorb as do carbonated beverages. Also,
alchol stronger than 40% is often thought to absorb slower
because it acts as an irritant to the gastric lining and is
retained in the stomach until there is other material to dilute
the alcohol.
3. Emotional State:
4. Shock- Shock (including a car accident) can cause the body to
shut down and close off the stomach, thus the alcohol stays in
the stomach and is not absorbed until later on;
5. Stomach Medications that affect the stomach or
gastrointestinal tract: This is why the police ask driver's if
they have taken any medication recently after the police stop
the driver for suspected dui.
6. Presence of food in the stomach: This is the most important
factor affecting alcohol absorption. Food requires digestion
(unlike alcohol) and any alcohol trapped in the food will be
absorbed at a slower rate than on an empty stomach.
ELIMINATION OF ALCOHOL-
It is generally estimated that people eliminate about .01 to
.025% alchol per hour. The amount eliminated is thought to
increase at higher levels of intoxication. Why does any of this
matter? Well, in short, the above will affect the defense of
your Wisconsin drunk driving case. For example, let's say a man
in Madison, Wisconsin has a shot of whiskey just before driving.
The Madison police stop the man five minutes later. The b.a.c.
test does not occur until two hours later. The b.a.c. says 0.08.
The above factors would be useful in helping determine the
b.a.c. of the driver at the time of driving. The important part
is that if a person was under 0.08 at the time he was driving,
then he should not be convicted of driving with a prohibited
alcohol concentration (PAC) even if a later test registers
higher than 0.08.
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