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Related Concept Videos

Renal Failure: Dose Adjustments01:11

Renal Failure: Dose Adjustments

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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.
Reduced renal clearance and elimination rate are common outcomes of renal impairment. These alterations lead to a prolonged elimination half-life and an altered apparent volume of distribution for drugs. As a result, dosage adjustments are typically necessary to maintain optimal drug levels in the body.
However, dosage adjustments...
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Factors Affecting Renal Clearance: Drug's Physicochemical Properties and Plasma Levels01:31

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Renal clearance of a drug is influenced by various factors, including its physicochemical properties and plasma levels. These factors play a significant role in determining how efficiently the kidneys eliminate a drug.
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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 Elimination by Renal Route: Tubular Secretion01:15

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Once the process of glomerular filtration is completed, blood carrying unfiltered drug molecules traverses through efferent arterioles and makes its way into the peritubular capillaries in the proximal tubule. A variety of carriers play a pivotal role in actively secreting drugs from these peritubular capillaries into the tubular fluid. The organic anion transporter transfers acidic drugs, against an electrochemical gradient, from the peritubular capillaries into the renal tubule cells and...
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Vancomycin nephrotoxicity: A comprehensive clinico-pathological study.

Rajesh Nachiappa Ganesh1,2, Angelina Edwards3, Ziad El Zaatari2

  • 1Department of Pathology, Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER), Puducherry, India.

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Vancomycin nephrotoxicity presents a distinct clinical and pathological profile, aiding diagnosis and treatment. Kidney biopsies reveal specific features distinguishing vancomycin nephrotoxicity (VNT) from other causes of acute kidney injury.

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Area of Science:

  • Nephrology
  • Pharmacology
  • Pathology

Background:

  • Vancomycin is crucial for resistant infections but causes nephrotoxicity.
  • The clinicopathologic profile and pathogenesis of vancomycin nephrotoxicity remain poorly understood.
  • Clinical studies are confounded by comorbidities and polypharmacy; animal models are insufficient.

Purpose of the Study:

  • To define the clinicopathologic and morphologic profiles of vancomycin nephrotoxicity (VNT).
  • To differentiate VNT from other causes of acute kidney injury (AKI) in patients undergoing renal biopsy.

Main Methods:

  • Studied 36 patients with AKI suspected of VNT, utilizing renal biopsies.
  • Detailed clinical, morphologic, and follow-up data were analyzed.
  • Categorized patients into VNT (25) and non-VNT (NO-VNT) (11) groups for comparison.

Main Results:

  • VNT group: characteristic clinical course (high vancomycin levels, rapid severe AKI, prompt recovery post-discontinuation).
  • VNT group: renal biopsy findings (allergic tubulointerstitial nephritis, granulomatous inflammation, nephrotoxic tubular necrosis, vancomycin casts).
  • Distinct clinico-pathologic profile differentiated VNT from NO-VNT.

Conclusions:

  • Vancomycin nephrotoxicity exhibits a unique morphologic and clinical signature.
  • This profile aids in diagnosis, treatment guidance, and prognostication.
  • The findings provide insights into the pathogenesis of VNT.