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Related Concept Videos

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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Factors Affecting Renal Clearance: Renal Impairment01:17

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Renal dysfunction significantly impairs the renal clearance of drugs, leading to potential complications in drug therapy. Renal failure, which can be caused by various factors, poses a significant challenge in the elimination of drugs from the body.
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Renal Failure: Dose Adjustments01:11

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In patients with renal impairment, drugs undergo significant changes in their pharmacokinetics, which require dosage adjustments to ensure safe and effective therapy.
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Drug Dosing in Renal Diseases: Dose Adjustments Based on Drug Clearance and Elimination Rate Constant01:25

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In patients with renal disease, dosage adjustments are necessary to maintain therapeutic plasma drug concentrations and prevent toxicity or subtherapeutic exposure. Renal impairment alters drug pharmacokinetics, especially in conditions like uremia, where changes such as prolonged elimination half-life and altered apparent volume of distribution can significantly affect drug disposition. These changes require careful modification of the dosing regimen to achieve the desired clinical...
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Chronic Kidney Disease II: Clinical Manifestations01:24

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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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Drug Dosing in Renal Diseases: Estimation of Glomerular Filtration Rate Based on Serum Creatinine Concentration01:28

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Glomerular filtration rate (GFR) can be estimated from serum creatinine using the modification of diet in renal disease (MDRD) formula or the chronic kidney disease–epidemiology collaboration (CKD–EPI) equation. Both methods are widely used in clinical practice to assess kidney function and guide treatment decisions.The MDRD equation does not require weight or height measurements and is normalized to the body surface area of 1.73 m², considered the average adult surface area.
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Related Experiment Video

Updated: Apr 29, 2026

Improved Home Blood Pressure Control by CT-guided Ozone-mediated Renal Denervation for Patients with Resistant Hypertension
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A mild decrease of renal function is related to increased hemoglobin level during 5-year follow-up period.

Nara Shin1, Hyunsuk Kim1, Hyo Jin Kim1

  • 1Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea.

The Korean Journal of Internal Medicine
|May 23, 2014
PubMed
Summary

A mild decrease in kidney function, measured by glomerular filtration rate (GFR), over five years was linked to higher hemoglobin levels in adults. This association was more pronounced in individuals without certain health conditions.

Keywords:
Chronic kidney failureErythropoiesisHemoglobins

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Area of Science:

  • Nephrology
  • Hematology
  • Internal Medicine

Background:

  • Kidney function, assessed by glomerular filtration rate (GFR), can change over time.
  • Hemoglobin levels are crucial indicators of oxygen-carrying capacity in the blood.
  • Understanding the relationship between GFR changes and hemoglobin is important for managing adult health.

Purpose of the Study:

  • To investigate the chronological relationship between changes in GFR and hemoglobin levels over a 5-year period.
  • To analyze how different degrees of GFR decline impact hemoglobin concentration.
  • To identify potential associations in a general adult population with initially preserved kidney function.

Main Methods:

  • Analysis of data from 5,266 adults with an initial GFR ≥ 60 mL/min/1.73 m(2).
  • Subjects were categorized into three groups based on their GFR ratio over 5 years (≥ 1.00, 0.75-0.99, < 0.75).
  • Hemoglobin levels and GFR changes were tracked over the 5-year follow-up period.

Main Results:

  • Higher baseline hemoglobin levels were observed in individuals with lower initial GFR (60-74 mL/min/1.73 m(2)) compared to those with higher GFR.
  • The frequency of increased hemoglobin over 5 years was significantly higher in the group with the largest GFR decline (GFRratio < 0.75) in both females and males (p < 0.001).
  • Logistic regression indicated a higher likelihood of increased hemoglobin in the lowest GFR ratio group (Group 3) for both genders, particularly in subgroups without metabolic syndrome, diabetes, or hypertension.

Conclusions:

  • A mild decline in GFR over 5 years is associated with an increase in hemoglobin levels in adults with initially preserved kidney function (GFR ≥ 60 mL/min/1.73 m(2)).
  • This association suggests a potential compensatory mechanism or an interplay between declining renal function and erythropoiesis.
  • The findings highlight the importance of monitoring both GFR and hemoglobin in long-term health assessments.