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Related Concept Videos

Pharmacodynamics in Geriatric Patients: Effects of Age01:27

Pharmacodynamics in Geriatric Patients: Effects of Age

Age-related pharmacokinetic changes are extensively documented, but understanding age-related pharmacodynamic alterations is relatively limited. This knowledge gap can be partly attributed to the complexity of developing appropriate measures of drug responses compared to bioanalytical methods for determining drug concentrations.Most information regarding age-related differences in human pharmacodynamics originates from cross-sectional studies. However, these studies assume that observed mean...
Aging01:26

Aging

Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
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Elderly individuals encompass a diverse population with varying degrees of age-related physiological changes. Defining the elderly presents challenges, as the geriatric population is often arbitrarily categorized as individuals older than 65. However, many individuals in this group lead active and healthy lives, with an increasing number surpassing 85 years and falling into the older elderly category. Physiological changes associated with aging impact performance capacity and homeostatic...
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution01:00

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution

Drug distribution in the human body is influenced by several factors, including plasma protein concentration, body composition, blood flow, tissue-protein concentration, and tissue fluid pH. Among these, changes in plasma protein concentration and body composition due to aging significantly affect how drugs are distributed within the body. Specifically, aging is associated with a decrease in albumin levels by about 10% and an increase in α1-acid glycoprotein levels. These alterations are not...
The Effect of Aging on Tissues01:19

The Effect of Aging on Tissues

Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption01:22

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption

As individuals age, their body's physiology evolves, affecting drug pharmacokinetics. The most apparent changes occur in the gastrointestinal tract, where an increase in gastric pH, a delay in gastric emptying, and a reduction in gastrointestinal motility are observed. Remarkably, these changes do not substantially modify the absorption of orally administered drugs, particularly those absorbed via passive diffusion.Transdermal drug delivery emerges as a highly viable method for older adults due...

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Epidemiology of aging.

Luigi Ferrucci1, Francesco Giallauria, Jack M Guralnik

  • 1Longitudinal Studies Section, Clinical Research Branch, National Institute on Aging, National Institutes of Health, MD, USA. ferruccilu@grc.nia.nih.gov

Radiologic Clinics of North America
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PubMed
Summary
This summary is machine-generated.

Global population aging is accelerating due to increased longevity and decreased mortality. This demographic shift significantly impacts societal needs for healthcare and social support systems, which are currently unprepared for the growing elderly population.

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Area of Science:

  • Gerontology
  • Public Health
  • Sociology

Background:

  • Significant global health changes observed in older adults over the last century.
  • Population aging driven by increased lifespan and reduced mortality rates.
  • Demographic shifts create escalating medical and social support demands.

Purpose of the Study:

  • To analyze the societal impact of global population aging.
  • To assess the preparedness of health and social protection systems for demographic changes.
  • To highlight the long-term implications of population aging.

Main Methods:

  • Demographic analysis of population trends.
  • Epidemiologic review of mortality causes and life expectancy.
  • Societal impact assessment of aging populations.

Main Results:

  • Remarkable improvements in older adult health globally.
  • Population growth and reduced mortality are key drivers of aging.
  • Steep increases in healthcare and social needs are projected.

Conclusions:

  • Societal structures and health systems were not adequately adapted to demographic changes.
  • Current systems are unprepared for the escalating needs of an aging global population.
  • Proactive, radical changes were needed decades ago and are critical now.