Gerontologic Nursing: Key Concepts Summary
Historical Perspective on the Study of Aging
Before the mid-1800s, human life was viewed in two stages: childhood and adulthood. Over time, distinct developmental stages within childhood were recognized, and in the 1960s research showed aging is not uniform and wellness, not just illness, should be the focus. Today, aging is a growing field in health and social sciences.
Key Historical Milestones in Gerontologic Nursing
The American Nurses Association (ANA) established the Division of Geriatric Nursing Practice in , defining geriatric nursing as assessing, planning, implementing, and evaluating care for older adults. In , the division was renamed to The Division of Gerontologic Nursing Practice to reflect a broader role. In , it became the Council of Gerontologic Nursing. In , the ANA established certification for Gerontologic Clinical Nurse Specialists (GCNS). In , differences between acute care and primary care gerontologic nurse practitioners were formally identified, leading to separate certification exams.
Demographics and Life Expectancy
Demographics is the statistical study of populations; demographers analyze population size, distribution, and vital statistics such as birth, death, age at death, marriage, and race. Demographic studies enable projections into the future, with life expectancy defined as the number of years an average person can expect to live. Historically, life expectancy was low due to environmental hazards, wars, disease, sanitation, and resource limitations.
Age Definitions and Aging Categories
"Old" is often defined as over years, an arbitrary cut set by Social Security. Today’s older population is commonly divided into the young old, middle old, and old old: the young old , the middle old , and the old old and up.
Characteristics of Aging
Aging can be described chronologically, physiologically, and functionally. Chronologic age, the number of years lived, is the easiest to identify and measure. Age classifications, such as young-old, middle-old, and old-old, help in planning care and services.
Ageing and Gerontophobia
Extreme forms of negative views toward aging include ageism and age discrimination. Ageism is the belief that aging makes people unattractive or unproductive, while age discrimination involves actions that treat older adults differently due to age.
The Baby Boomers and Population Growth
The Baby Boomer cohort (born after World War II between and ) is driving rapid increases in the older population. The oldest Boomers reached age in , and by all Boomers will be 65 or older. With the cohort’s size, the older population in is projected to be twice its size in , impacting health care and related systems.
Geographic Distribution and Living Arrangements
Older adults generally change residences less often than other groups, but moves occur due to functional status, proximity to caregivers, finances, or preferences for climate or retirement settings. Living with a spouse or partner and living alone are common arrangements among older adults.
Effect of an Aging Population on Gerontologic Nursing
The demographic shift requires development of healthcare delivery frameworks tailored to older adults. There is a need for new visions in education, practice, and research to address their unique needs.
Biologic Theories of Aging
Aging is viewed as a series of biologic changes leading to loss of function and eventual death. Theories split into stochastic (random assaults) and nonstochastic (predetermined processes). Biologic aging varies by species and among individuals, and organs do not all age at the same rate.
Foci of Biologic Theories
Biologic theories explain deleterious, progressive, intrinsic aging changes affecting all members of a species, with differential aging across organs and individuals.
Biologic Theories Divisions
The two main divisions are STOCHASTIC THEORIES (random assaults) and NONSTOCHASTIC THEORIES (predetermined processes).
STOCHASTIC THEORIES
Key examples include Error Theory, Free Radical Theory, Cross-Linking Theory, Wear and Tear Theory, and Evolutionary Theory.
1. Error Theory
Proposed in , errors in transcription during protein synthesis can lead to defective enzymes or proteins. More recent research has not strongly supported this theory.
2. Free Radicals and Lipofuscin Theories
Free radicals from oxygen metabolism may be countered by antioxidants (e.g., vitamins and ). Lipofuscin is an age pigment that accumulates in cells and can disrupt metabolism.
3. Cross-Linking Theory
DNA cross-links from radiation or chemicals hinder normal strand separation during mitosis, impairing cellular division.
4. Wear and Tear Theories
Aging results from cumulative use and injury to body systems as they perform specialized functions.
5. Evolutionary Theory
Aging relates to genetics via mutation and natural selection; sub-ideas include Mutation accumulation, Antagonist pleiotropy, and the Disposable Soma theory.
NONSTOCHASTIC THEORIES
Nonstochastic theories view aging as a predetermined process, including the Programmed Theory and Immunity Theory.
1. Programmed Theory (Hayflick Limit)
Cell reproduction is finite in a species-specific life span; aging is preprogrammed in cells.
2. Immunity Theory
Immunosenescence refers to age-related decline in immune function, with reduced T-cell proliferation and humoral response, increasing susceptibility to infections, cancer, auto-immune disease, and impaired immune response.
Emerging Theories of Aging
New ideas include Neuroendocrine Control (pacemaker) theory, Metabolic Theory/caloric restriction, and DNA-related research (genome mapping and telomeres).
1. Neuroendocrine Control
Interplay between the nervous and endocrine systems declines with age; hormones such as hypothalamic regulators, adrenal DHEA, and pineal melatonin influence aging processes and rhythms.
2. Metabolic Theory of Aging (Caloric Restriction)
Organisms have a finite metabolic lifetime; higher metabolic rates correlate with shorter lifespans. Caloric restriction has been shown to extend lifespan in some models.
3. DNA-Related Research
Advances include human genome mapping and discovery of telomeres, which are linked to cellular aging processes.
Sociologic Theories of Aging
Core theories include Disengagement, Activity/Developmental Task, Continuity, Age Stratification, and Person-Environment Fit.
Changing Focus in Sociologic Considerations
From 1960s emphasis on losses, to broader societal and structural factors in the 1970s, to exploring interrelationships among older adults and their environments in the 1980s–1990s.
Disengagement Theory
Proposed by Cumming & Henry (), aging is a developmental task involving mutual withdrawal between older adults and society; this view is no longer widely supported.
Activity Theory (Developmental Task Theory)
Active participation is linked to life satisfaction and positive self-concept; activity, happiness, and self-assessment drive successful aging.
Continuity Theory
Aging reflects continuity of personality and behavior; old age is not a separate phase but a continuation of the life pattern.
Age Stratification Theory
Society ages in cohorts; roles and expectations change with age, creating interdependence between older adults and society.
Person-Environment Fit Theory
Individuals possess competencies (ego strength, motor skills, health, cognition, senses) that interact with environmental demands; aging can alter this fit, especially in technology-rich societies.
Psychological Theories of Aging
Main theories include Maslow, Jung, Erikson, Peck, and Selective Optimization with Compensation.
Maslow's Hierarchy of Needs
A hierarchy from physiological needs to self-actualization; self-actualization involves creativity, meaning, and peak experiences; few reach this pinnacle. The hierarchy is depicted as a pyramid with Physiological Needs at the base and Self-Actualization at the top.
Jung's Theory of Individualism
Self-realization guides personality development; aging allows transformation toward a more spiritual state.
Erikson's Eight Stages of Life
Older adulthood focuses on ego integrity vs despair; unresolved crises lead to despair, while successful resolution fosters a sense of meaning.
Peck's Expansion of Erikson's Theory
Adds three tasks for old age: ego differentiation vs work-role preoccupation, body transcendence vs body pre-occupation, and ego transcendence vs ego preoccupation.
Selective Optimization with Compensation
Baltes’ model of managing aging losses through selection, optimization, and compensation to maintain function and quality of life.
Gerontophobia and Myth vs Fact
Gerontophobia is the fear of aging and fear of older adults’ inclusion; myths portray older adults as alike, lonely, dependent, or cognitively impaired, while facts show diversity, independence, varying intellectual status, and generally stable personality with age. Box 1-1 highlights these myths vs facts to counter stereotypes.