Alcohol Flashcards
Types of Alcohol
Ethanol
Methanol
Isopropanol
Ethylene glycol
Routes of administration
Topical
Inhalation
Intravenous injection
Oral ingestion
Pharmacology and Toxicology
Absorption
Distribution
Elimination in the body
Factors affecting absorption
Alcohol concentration of the ingested beverage
Physiology
Presence of food in the stomach
Alcohol concentration of the ingested beverage
Beverages > 30% alc will irritate the gastric mucosa and increase mucous production
Physiology
Changes in blood supply to GI tract
Changes in motility will affect speed with which ethanol enters the small intestine
Presence of food in the stomach
Food in the stomach will prolong gastric emptying time, resulting in a lower, delayed peak blood alcohol concentration
Distribution
Alcohol = hydrophilic and will distribute into fluid and tissues according to water content
Total body weight (TBW) dependent on
Age
Sex
Body Weight
Alcohol metabolism
5-10% ethanol is excreted
Bio transformation occurs in liver
Commences as soon as ethanol is absorbed
Alcohol dehydrogenase is primary enzyme
Elimination
Zero order kinetics
Ranges 10-20 mg/100mL
Average rate of elimination is 15mg/100mL/hour
Unaffected by coffee, air, showering
Fructose can
Increase elimination rate of alcohol
Effects of alcohol on the body
Vasodilatation
Disinhibition
CNS Depressant
Vasodilatation
Creates feeling of warmth when alcoholic beverages are consumed
Disinhibition
Responsible for the “stimulant” effects of alcohol
CNS Depressant
Non selective depression of brain and spinal cord
Effects occur on a continuum -with increased BAC, increased effects occur
Alcohol intoxication is major risk factor of
Positional asphyxiation
Alcohol in the blood
Plasma and serum are the “watery” components of whole blood
*both have higher alcohol content than whole blood
Alcohol in urine
Alcohol will pass from the blood into the urine as the blood is filtered through the kidneys
Alcohol in breath
Alcohol is volatile- at physiological temperatures alcohol will diffuse from the blood into the alveolar air of the lung and into the breath
Effects of alcohol and driving
The following are impaired at low BAC: Judgement Ability to divide attention Choice reaction time Tracking Vision
Field sobriety tests
Nystagmus -jerking of eyes as they move to the side
Walk and turn
One leg stand
Analysis for blood alcohol
GC testing