The elderly Flashcards
Categories of aging
Young-old: 65-74 yrs Old: 75-84 Old-old: 85-99 Elite-old: over 100 each category has distinct set of interests and HC needs
65 years and over population
grown twice as fast, US census in 2000 found that of 35 million 1/8 were >65, by 2030 in a population of 70 million 1/4 will be >65,
85 years and older population
most rapidly increasing age group, projected to reach 9.6 million in 2030, in 2002 the population was 6 million
Baby-boomers
turning 65 placing greater demands on health care, born within 1946-1964
Four basic characteristics of aging process
Universal, progressive, intrinsic in nature, and affected by extrinsic factors
Senescence
the process of growing old
Biological
progressive loss of function, multifactor process, quality of life while increasing life span, slow or reverse age related changes, and researched to reverse effects of aging
Two categories of biological aging theories:
Stochastic (aging is due to chance) and nonstochastic theory (age related molecular and cellular events)
Stochastic theories
Genetic, Free radical, cross-link theories
Genetic theory
determines life expectancy, internal mechanism determines senescence, faulty synthesis of DNA, thought to be primary cause, somatic/intrinsic/transcription
Free Radical theory
unstable free radicals, causes biochemical changes (cells cannot regenerate), byproducts of cellular processes and environment (atherosclerosis, cataracts, and cancer)
Cross-link theory
chemical reactions as cells age, loss of elasticity, stiffness, loss of function and rigid, fragile tissue
Nonstochastic theory
Neuroendocrine, immunity theory, programmed theory, telomere-telomerase hypothesis, and stress theory
Neuroendocrine
efficiency of signals between mechanisms is lost or altered, changes in hypothalamic-pituitary system
Immunity theory
reduced resistance to infectious diseases and viruses-possibly related to genetics, environment, or endocrine factors
Programmed theory
biological clock triggers specific cell behaviors @ specific times, specific # of cell divisions and specific life span, impairment in ability of cell to continue dividing
Telomere-telomerase hypothesis
limits number of times cell can divide, strong relationship between aging and cancer