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Related Concept Videos

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

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

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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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Serum Studies: Renal Function Tests01:24

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Renal function tests are crucial for assessing kidney health, monitoring disease progression, and evaluating the kidneys' efficiency in waste elimination, fluid balance, and electrolyte regulation. These tests offer critical insights into kidney function, even though routine measurements may appear normal until there is a significant decline in the glomerular filtration rate or GFR. Typically, signs of kidney impairment only become evident when the GFR falls to about 50% of its normal level.
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Drug Dosing in Renal Diseases: Measurement of Glomerular Filtration Rate01:25

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The glomerular filtration rate (GFR) is a critical indicator of kidney health, reflecting how well the kidneys filter blood. Changes in GFR can signal potential kidney impairment, necessitating accurate measurement methods to monitor kidney function effectively.Various molecules can serve as markers for GFR measurement, with the ideal marker meeting several specific criteria. It must freely filter at the glomerulus, avoid reabsorption or secretion by the renal tubules, remain unmetabolized, not...
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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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Drug Dosing in Renal Diseases: Measurement of Serum Creatinine Concentration and Clearance01:25

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In healthy individuals, serum creatinine levels remain stable due to a balance between its constant production—primarily from muscle metabolism—and renal excretion. Creatinine is freely filtered by the glomeruli, making it a valuable marker for estimating renal function. When the glomerular filtration rate (GFR) decreases, the kidneys can only eliminate less creatinine, causing serum levels to rise.Serum creatinine concentration is widely used to estimate creatinine clearance...
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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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The correlation between renal function and bone mineral density.

T -H Tseng1, C -F Mu, C -Y Hsu

  • 1Department of Orthopedics National Taiwan University Hospital Taipei, Taiwan - 4211@mail.pch.org.tw.

Minerva Urologica E Nefrologica = the Italian Journal of Urology and Nephrology
|July 30, 2014
PubMed
Summary
This summary is machine-generated.

Bone mineral density (BMD) significantly decreases in men with mild chronic kidney disease (CKD). Osteoporosis screening is recommended for patients with reduced kidney function, especially women in advanced CKD stages.

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Area of Science:

  • Nephrology
  • Endocrinology
  • Bone Metabolism

Background:

  • Chronic kidney disease (CKD) is linked to bone loss, particularly in moderate to end-stage renal disease.
  • The impact of mild CKD on bone mineral density (BMD) remains unclear.
  • Investigating the association between reduced glomerular filtration rate (GFR) and BMD is crucial.

Purpose of the Study:

  • To determine if reduced GFR in mild and severe chronic kidney disease (CKD) is associated with decreased bone mineral density (BMD).
  • To analyze BMD variations across different stages of CKD.

Main Methods:

  • 305 patients were categorized into CKD stages I, II, and ≥III based on estimated GFR calculated using the CKD-EPI equation.
  • BMD was compared between these CKD stage groups.
  • Data collected between April and November 2011.

Main Results:

  • Significant bone loss was observed in CKD stage ≥III, particularly in women (P<0.05).
  • Male participants with CKD stage II demonstrated a significant decrease in BMD (P=0.041).
  • The study included 81 women and 65 men with an average age of 65.6.

Conclusions:

  • Mild renal dysfunction is associated with significantly decreased BMD in men.
  • Advanced CKD stages (≥III) also show significant BMD reduction, especially in women.
  • Routine osteoporosis screening is advisable for individuals with impaired kidney function.