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

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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...
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Chronic Kidney Disease I: Introduction01:25

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Chronic Kidney Disease (CKD) arises when the kidneys progressively lose their ability to function, ultimately leading to end-stage renal disease. At this advanced stage, the kidneys can no longer filter waste or maintain essential body functions, requiring renal replacement therapy (RRT) through dialysis or a kidney transplant for survival.Early-stage chronic kidney disease and detection challengesIn CKD's early stages, symptoms often remain absent because healthy nephrons compensate for...
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Chronic Kidney Disease (CKD) progressively impairs multiple body systems due to the accumulation of uremic toxins, which disrupt cellular functions across various organs.Neurologic symptomsNeurologic symptoms often arise early in CKD, as uremic toxin buildup drives changes in cognitive and motor functions. Patients frequently experience fatigue, headache, confusion, difficulty concentrating, and, in severe cases, seizures. Peripheral neuropathy commonly manifests as burning sensations in the...
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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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Urine formation is an essential function of the human body. It plays a critical role in maintaining homeostasis by regulating the volume and composition of body fluids. The kidneys, the primary organs involved in this process, filter blood to remove waste products and excess substances, ultimately producing urine.
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Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism01:18

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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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Assessment of Vascular Function in Patients With Chronic Kidney Disease
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The Kidney in Aging: Physiological Changes and Pathological Implications.

H Sobamowo1, S S Prabhakar1

  • 1Texas Tech University Health Sciences Center, Lubbock, TX, United States.

Progress in Molecular Biology and Translational Science
|March 4, 2017
PubMed
Summary
This summary is machine-generated.

Aging kidneys experience functional decline and structural changes like glomerulosclerosis. This review explores the mechanisms, controversies, and functional defects, including acid-base and electrolyte imbalances, in the aging kidney.

Keywords:
AgingGeriatric nephrologyKidney failureRenal physiology

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Area of Science:

  • Nephrology
  • Gerontology
  • Physiology

Background:

  • Aging is linked to a gradual decrease in kidney function.
  • Morphological changes, including glomerulosclerosis, are common in aging kidneys.
  • Debate exists regarding whether kidney aging is a physiological process or pathological.

Purpose of the Study:

  • To review the mechanisms of age-related kidney changes.
  • To discuss the physiological versus pathological nature of the aging kidney.
  • To examine renal functional defects in the elderly, focusing on acid-base and electrolyte balance.

Main Methods:

  • Literature review of aging kidney research.
  • Analysis of studies on renal function and morphology in aging.
  • Discussion of physiological mechanisms underlying age-related renal changes.

Main Results:

  • Aging kidneys show progressive functional decline and structural alterations.
  • Mechanisms driving these changes and the physiological basis of aging kidney controversies are examined.
  • Age-related defects in acid-base homeostasis and electrolyte balance are discussed.

Conclusions:

  • Kidney aging involves complex functional and structural changes.
  • Understanding these changes is crucial for differentiating physiological aging from pathology.
  • Addressing acid-base and electrolyte disturbances is key in geriatric nephrology.