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Related Concept Videos

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...
Kidney Structure01:45

Kidney Structure

The kidneys are two large bean-shaped organs located in the upper abdomen. They filter the blood several times a day to remove toxins and rebalance water and electrolytes of the circulatory system via the renal veins. The kidneys receive blood directly from the heart via the renal arteries. These arteries enter the kidney at the hilum, the concave surface of the bean, where they branch and divide into smaller vessels and capillaries.
Chronic Kidney Disease I: Introduction01:25

Chronic Kidney Disease I: Introduction

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...
Renal Corpuscle01:20

Renal Corpuscle

The glomerulus and Bowman's capsule are two essential components of the nephron, which is the functional unit of the kidney. These microscopic structures play a critical role in the process of blood filtration to produce urine.
Glomerulus: Structure and Function
The glomerulus is a tiny, intricate network of capillaries located at the beginning of the nephron. It's enveloped by the Bowman's capsule and receives its blood supply from an afferent arteriole, which divides into numerous capillaries...
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...
Nephrons01:10

Nephrons

The kidneys are intricate organs with millions of working units known as nephrons. Each nephron features two major structures: the renal corpuscle, which facilitates blood plasma filtration, and the renal tubule, which handles the glomerular filtrate. Blood supply is directly linked to the nephrons. The renal corpuscle consists of the glomerulus, a capillary network, and the Bowman's capsule, a double-walled epithelial structure that encases the glomerulus. The filtering of blood plasma happens...

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Related Experiment Video

Updated: Jul 2, 2026

Estimation of Nephron Number in Whole Kidney using the Acid Maceration Method
08:15

Estimation of Nephron Number in Whole Kidney using the Acid Maceration Method

Published on: May 22, 2019

[The kidneys and old age].

D Fliser1

  • 1Klinik für Innere Medizin IV, Nieren- und Hochdruckkrankheiten, Universitätsklinikum des Saarlandes, Homburg/Saar. indfli@uks.eu

Deutsche Medizinische Wochenschrift (1946)
|September 5, 2008
PubMed
Summary
This summary is machine-generated.

Renal function declines less with age than expected, but cardiovascular risks like hypertension and diabetes worsen these changes. This impacts drug safety and fluid balance in older adults.

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Analysis of Nephron Composition and Function in the Adult Zebrafish Kidney
08:53

Analysis of Nephron Composition and Function in the Adult Zebrafish Kidney

Published on: August 9, 2014

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Last Updated: Jul 2, 2026

Estimation of Nephron Number in Whole Kidney using the Acid Maceration Method
08:15

Estimation of Nephron Number in Whole Kidney using the Acid Maceration Method

Published on: May 22, 2019

Analysis of Nephron Composition and Function in the Adult Zebrafish Kidney
08:53

Analysis of Nephron Composition and Function in the Adult Zebrafish Kidney

Published on: August 9, 2014

Area of Science:

  • Gerontology
  • Nephrology
  • Pharmacology

Context:

  • Aging is associated with renal function changes, but these are less severe than previously believed.
  • Cardiovascular risk factors (hypertension, diabetes, smoking) significantly aggravate age-related renal decline.
  • Elderly individuals with comorbidities face heightened risks of kidney disease and acute renal failure.

Purpose:

  • To elucidate the nuances of renal function in advanced age.
  • To examine the influence of cardiovascular risk factors on age-related renal changes.
  • To highlight the implications for medication management and fluid balance in the elderly.

Summary:

  • Age-related renal function decline is less pronounced than previously thought.
  • Cardiovascular risk factors exacerbate renal impairment in older adults.
  • Impaired renal function in the elderly increases risks of dehydration, fluid overload, and adverse drug reactions.

Impact:

  • Provides a clearer understanding of kidney function in aging populations.
  • Informs clinical management strategies for elderly patients with cardiovascular comorbidities.
  • Emphasizes the need for careful medication selection and monitoring in older adults due to altered renal excretion.