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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

316
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...
316
Drug Dosing: Geriatric Patients01:15

Drug Dosing: Geriatric Patients

347
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...
347
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution01:00

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution

340
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...
340
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism01:18

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism

324
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...
324
Pharmacodynamics in Geriatric Patients: Effects of Age01:27

Pharmacodynamics in Geriatric Patients: Effects of Age

317
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...
317
Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

2.4K
Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
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Related Experiment Video

Updated: Mar 30, 2026

Rapid Point-of-Care Assay of Enoxaparin Anticoagulant Efficacy in Whole Blood
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Anticoagulant conversion in the elderly: pitfalls.

Bassam Al-Nasser1

  • 1Clinique du Parc Saint Lazare, 1 et 3 Avenue Jean Rostand, 60000 Beauvais, France.

Journal of Clinical Anesthesia
|November 9, 2015
PubMed
Summary
This summary is machine-generated.

Elderly patients on anticoagulation face risks during medication conversion. This study highlights fatal bleeding complications, emphasizing the need for specialized guidelines in geriatric anticoagulation management to prevent adverse events.

Keywords:
AnesthesiaBleedingElderlyFondaparinuxVenous thromboembolismVitamin K antagonist

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Area of Science:

  • Geriatrics
  • Pharmacology
  • Vascular Medicine

Background:

  • Antithrombotic therapy is crucial for elderly patients with thromboembolic risks.
  • Age-related physiological changes can increase susceptibility to anticoagulation complications.

Observation:

  • Two elderly female patients experienced fatal bleeding complications during the transition from fondaparinux to vitamin K antagonists.
  • Complications included popliteal hematoma and limb ischemia, occurring during the oral anticoagulant conversion period.

Findings:

  • The conversion period from initial anticoagulation to oral anticoagulants poses significant bleeding risks in the elderly.
  • Obesity and advanced age are contributing factors in these adverse events.

Implications:

  • There is a critical need for specific clinical guidelines for anticoagulation management in the elderly population.
  • Improved management protocols can reduce the incidence of thromboembolic and bleeding complications in older adults.