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Related Concept Videos

Drug Dosing: Geriatric Patients01:15

Drug Dosing: Geriatric Patients

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...
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...
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Excretion01:18

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Excretion

In geriatric patients, renal physiology undergoes significant changes, including diminished renal blood flow and a lower glomerular filtration rate (GFR), leading to alterations in medication clearance. Drugs such as aminoglycoside antibiotics, lithium, and digoxin, which rely on glomerular filtration for removal from the body, particularly impact pharmacokinetics. These drugs tend to have slower clearance rates in older adults, necessitating careful dosage considerations.Evaluation of renal...
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism01:18

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism

Geriatric patients show significant variation in how their bodies process medications, which can change how effective and safe treatments are. The liver is the primary organ where drug metabolism occurs, involving two main types of chemical reactions: phase I and II. Phase I metabolism is driven by the cytochrome P450 enzyme system, which includes key types such as CYP3A, CYP2D6, and CYP2C9. Research indicates that while aging doesn't notably alter the levels or activity of these enzymes, it...

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Related Experiment Video

Updated: Jul 11, 2026

Evaluating the Function of the Foot Core System in the Elderly
08:25

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Published on: March 11, 2022

[Anthropometry, body composition and functional limitations in the elderly].

Patricia Arroyo1, Lydia Lera, Hugo Sánchez

  • 1Unidad de Salud Pública y Nutrición, Laboratorio de Epidemiología Nutricional y Genética, Instituto de Nutrición y Tecnología en Alimentos, Universidad de Chile, Chile.

Revista Medica De Chile
|October 5, 2007
PubMed
Summary

Hand grip strength is a key indicator of functional limitations in older adults. Measuring grip strength is a simple, cost-effective method to assess mobility and guide interventions for improving elderly independence.

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Last Updated: Jul 11, 2026

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Area of Science:

  • Gerontology
  • Human Physiology
  • Biostatistics

Context:

  • Functional limitations significantly impact elderly independence and quality of life.
  • Community-living older adults face challenges in maintaining daily activities.
  • Aging populations worldwide necessitate effective assessment tools for functional status.

Purpose:

  • To evaluate the relationship between anthropometric measurements and body composition with functional limitations in older adults.
  • To identify key predictors of functional decline in the elderly population.
  • To explore the utility of handgrip strength as a functional limitation indicator.

Summary:

  • A cross-sectional study of 377 older adults (≥65 years) assessed anthropometrics, body composition (Dual-Energy X-Ray Absorptiometry), and functional limitations.
  • Results indicated a strong inverse association between handgrip strength and functional limitations in both men and women.
  • While age was a risk factor for women, only handgrip strength showed a significant association with functional limitations across both genders.

Impact:

  • Handgrip strength is a valuable, accessible, and time-efficient metric for assessing functional limitations in the elderly.
  • This finding supports the use of handgrip dynamometry in geriatric care for evaluating functional ability and intervention effectiveness.
  • Simple assessments like handgrip strength can aid in early identification and management of functional decline, promoting healthier aging.