Intro to Geriatrics Flashcards
At what age is someone considered elderly?
> 65 yo
- HOWEVER advances in medicine/prevention have caused dispute in this traditional labeling
Average life expectancy (2014)
78.6 yrs
Life span definition
The number of years a species is expected to survive
Life expectancy definition
The average number of years of life remaining at a specific age
- Based on statistical probability
Chronological age definition
How many years a person has been alive
Biological age definition
The age that most people would be with a body & mind like theirs
- Based on health status
How do we approach signs of “normal aging”
Treat as pathology until proven otherwise
Organ system decline
1% per year from 30 yo
Age-related changes: endocrine
- Impaired glucose homeostasis (increase glucose w/ illness)
- Decrease vit D absorption (osteopenia)
- Decreased thyroxine clearance (decrease T4 dose)
Age-related changes: general
- Decreased volume of TBW (decrease volume of distribution of water soluble drugs)
Age-related changes: respiratory
- Decreased cough reflex (microaspiration)
- Decreased lung elasticity, increase chest wall stiffness, decreased diffusion capacity (decrease resting PO2)
Age-related changes: CV
- Decreased B-receptor responsiveness (decrease CO & HR from stress)
- Decreased baroreceptor sensitivity, decrease SA node automaticity (orthostatic HTN, volume depletion)
Age-related changes: GI
- Decreased hepatic fcn (delayed hepatic clearing drug metabolism)
- Decreased colonic motility, decreased anal/rectal fcn (constipation)
Age-related changes: GU
- Vaginal/urethral atrophy (dyspareunia, bacteruria)
- Prostate enlargement (increase residual urine volume)
Age-related changes: MSK
- Decreased muscle mass (falls)
Age-related changes: nervous system
- Brain atrophy (benign senile forgetfulness)
- Decreased “righting reflex” (body sway, unsteadiness)
- Decreased stage 4 sleep (insomnia, early awakening)
- Impaired thermal regulation (lower resting temp.)
Age-related changes: skin
- Increased elasticity, thinning (wrinkles, sagging)
Age-related changes: eye
- Presbyopia (decreased accommodation)
- Decreased visual acuity (need for increased lighting)
Consequences of normal aging can lead to…
Pathology unless recognized/addressed
Normal aging is a
Diagnosis of exlusion
Most functional loss in older patients is r/t….
Disease and NOT aging itself
Loss of organ function can be thought of as a
Threshold/”tipping point”
Ex) Renal decline -> decrease urination -> stress applied (UTI) -> diminished function/hospitalization
Hallmark of aging is
How well an organ adapts to external stress
Examples of preventative measures to target focal areas of diminished reserve
- Exercise to prevent falls
- Vaccines to prevent pneumonia
Consequences of diminished reserve
- Atypical disease presentation (e.g. PNA: CC = acute confusion)
- Law of diagnostic parsimony (e.g. common cold in young pt. vs elderly)
- Weakened compensatory mechanisms (delayed manifestation of disease (e.g. fever), slow illness recovery
- Increased risk for iatrogenesis (r/t interactions w/ healthcare system)
Law of diagnostic parsimony
Theory of one unifying diagnosis to explain presentation (aka can explain complaints with one single problem)
- Works better in young & middle-aged pt.
Neuropsychiatric changes (e.g. dementia, stroke) are ass. w/
Physical frailty, social isolation
Pt. >65 compose __% of all patients seen; in 40 years it is projected to be __%
33%; 50%
Why is the geriatric population increasing?
- Advances in medicine keep people alive longer
2. Decreased birth rate
Those ages >65 (13% of the population account for __% of healthcare costs
33%
Robust: clinical condition
> 5 yr life expectancy
Frail: clinical condition
<5 yr life expectancy
Moderate dementia: clinical condition
2-10 yr life expectancy