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Classification of toxic exposure - Coggle Diagram
Classification of toxic exposure
Route of exposure
GIT
Ingestion
May be less toxic due to detoxification by liver
Lungs
Inhalation
May be more toxic as it eneters circulation with no detox
Skin
Topical
Parenteral
Injection
IV route most rapid response & greatest effect
Duration and frequency
Acute exposure
Exposure to chemical for less than 24 hrs
Single administration of VERY toxic substance
repeated administration of SLIGHTLY toxic substance within 24 hours
Death usually occurs in acute exposure
Subchronic exposure
Repeated exposure for 1-3 months
Chronic exposure
Repeated exposure for more than 3 months
Chronic bronchitis in cigarette smokers
Liver cirrhosis in alcoholics
Circumstance
Accidental
Unintended
Common in children & elderly
Examples:
Incorrct intake of drugs
ingestion of pesticides
combining cleaning agents that react
Suicidal
Intentional & deliberate
cyanide pill used by undercover agents escaping interrogation
overdose with CNS depress. eg. Barbiturates
Criminal/ homicidal
Intentional harm to other person
Incidence
At home
Exposure to toxic doses of carbon monoxide due to incorrect usage of heaters
Occupational
industrial & agricultural premises due to exposure to hazardous chemicals or wastes
Inhalation of toxic gases, exposure to irritants