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Related Concept Videos

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption01:22

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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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Chronic Obstructive Pulmonary Disease-II: Pathophysiology01:20

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Chronic Obstructive Pulmonary Disease (COPD) pathophysiology is intricate and multifaceted, involving a complex interplay of physiological processes. Understanding these mechanisms is crucial for effectively managing and treating COPD. Here is an in-depth look at the critical elements in the pathophysiology of COPD:
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The Effect of Aging on Tissues01:19

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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...
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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...
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Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution01:00

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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...
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Pulmonary effects of aging.

Daniel Tran1, Kapil Rajwani2, David A Berlin2

  • 1Department of Anesthesiology, Yale University School of Medicine, New Haven, Connecticut.

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Elderly patients face increased surgical risks due to age-related declines in lung function and immunity. Understanding these changes is crucial for preventing postoperative respiratory complications in older adults.

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Area of Science:

  • Geriatric Medicine
  • Pulmonology
  • Anesthesiology

Background:

  • The aging population is experiencing a rise in chronic illnesses, impacting lung function and posing public health challenges.
  • Anesthetic management for elderly patients necessitates understanding age-related physiological changes and the influence of chronic diseases.
  • Older adults (over 65) have a significantly higher risk of postoperative respiratory complications, particularly those with pre-existing conditions.

Purpose of the Study:

  • To highlight the importance of assessing surgical fitness in elderly patients.
  • To underscore the need for specialized anesthetic care considering age-related physiological changes and chronic diseases.
  • To address the increased risk of postoperative respiratory complications in the elderly population.

Main Methods:

  • Review of current literature on aging, pulmonary function, and surgical outcomes.
  • Analysis of age-associated changes in pulmonary immunity and defense mechanisms.
  • Examination of the impact of chronic diseases on physiological reserve in older adults.

Main Results:

  • Advanced age is linked to altered pulmonary immune responses, including dysregulated pro-inflammatory mediators and impaired antimicrobial defenses.
  • Aging disrupts the function of key immune cells in the lungs, such as alveolar macrophages, neutrophils, and natural killer cells.
  • These immunological changes contribute to reduced pulmonary function and diminished response to infections in older individuals.

Conclusions:

  • Physiological reserve and airway defenses diminish with age, increasing the risk of postoperative complications.
  • The limitations imposed by aging may become evident only under the stress of surgery and anesthesia.
  • Careful preoperative assessment and tailored anesthetic strategies are essential for mitigating surgical risks in elderly patients.