Ch. 1 Intro To Patho Flashcards
Physis
Nature
Pathology
Study and diagnosis of disease through the examination of organs, tissues, cells, and bodily fluids
Physiology
Study of mechanical, physical, and biochemical fxns of living organisms
Pathophysiology
Study of altered health
Study of abnormalities in physiologic functioning of living beings
Study of:
1) etiology
2) pathogenesis
3) clinical manifestations of disease
Etiology
What causes a disease or reasons for it occurring
Is the first step in the pathophysiologic process
Etiology can be: (3)
- Idiopathic
- Iatrogenic
- Multifactorial
Etiology -> idiopathic
Cause is unknown
Etiology -> Iatrogenic
Cause is the result of an unintended or unwanted medical treatment
Etiology -> Multifactorial
Has multiple etiologic factors that contributes to its development
Etiologic factors : Examples (4)
- biologic agents (bacteria, viruses -> such as PNA, Meningitis, HIV)
- Physical forces (trauma, burns, radiation) skin cancer from UV sunlight, broken bones and cuts
- Chemical agents (poisons, alcohol)
Poisons are more direct
Alcohol can lead to a host of conditions such as chronic pancreatitis, cancers of the stomach
and mouth, alcohol leads to more insidious processes - Nutritional excesses or deficits
Pathogenesis
Development of disease from the initial etiology to the ultimate clinical manifestations of that disease
Comprised of risk factors, precipitating risk factors, and mechanisms that lead to clinical manifestations
Risk factors
Factor when present increases the likelihood of disease
Identification is important for disease prevention
Focus of epidemiology
Modifiable vs. non-modifiable
Modifiable risk factor
Something that we can address or change in an individual
Ex: If we can help a person quit smoking we can decrease their risk for lung cancer
Non-modifiable risk factor
Factor not controllable
Ex: Age
Precipitating factors
Triggers that promote the onset of clinical manifestations
Allergic reaction to cats can trigger an asthma attack
Pts allergic to sulfa drugs- trigger an allergic reaction if given bactrim which contains a sulfa drug, an antibiotic
Risk factors vs. precipitating factors
Risk factors lead to disease
Precipitating factors lead to manifestations when somebody already had the disease
Human Diversity
1) Cultural considerations
2) age and biologic factors linked
3) race/ethnic differences
4) socioeconomic status
5) gender differences
6) situational differences
7) time variations
Human diversity -> cultural considerations
Each culture defines health and illness in a manner that reflects their experience
Human diversity -> age and biological factors linked
A normal value for a person at one age may not be normal for a person at another age
Human diversity -> race/ethnic differences
Relevant in both health and disease
Human Diversity -> socioeconomic status
Lower SES have poorer health and health outcomes
Human diversity -> gender differences
Relevant in both health and disease
Human diversity -> situational differences
Determine whether a derivation from normal should be considered abnormal or an adaptation mechanism
Human diversity -> time variations
May impact how the body responds from day to night, or at varying times
Sx
Subjective feeling of abnormality in the body
Signs
Objective or observed manifestations of disease
Syndrome
A set of signs and sx not yet determined to delineate a disease
Types of Clinical Manifestations
1) local vs. systemic
2) acute ( first few days/weeks) vs. chronic (longer than 6 months) (asymptomatic)
Ex: Hepatitis C -> period of being asymptomatic then if enough liver damage may start having sx
3) remissions vs. exacerbations
Period of no sx vs. flaring up of sx