Renal: Contrast-Induced Nephrotoxicity: Free MSRA Podcast

⚕️ FREE MSRA PODCAST – Nephrotoxicity due to Contrast Media🎧 Understand this high-risk complication from contrast agents – vital for imaging safety and renal protection during clinical practice.🧠 Key Learning Points📌 Definition• Acute kidney injury triggered by iodinated contrast, typically seen within 48–72 hours after imaging.📌 Causes & Risk Factors• Iodinated contrast agents (e.g. during CT/PCI)• Pre-existing CKD• Dehydration• Diabetes mellitus• Older age• Heart failure• Concurrent nephrotoxic meds (NSAIDs, diuretics)💡 Mnemonic: "SICK KID" – Sepsis, IV contrast, CKD, K+ imbalance, Infection, Diabetes📌 Pathophysiology• Renal vasoconstriction → ↓ perfusion• Direct tubular epithelial toxicity• ↑ Oxidative stress• Inflammatory cascade → tubular injury📌 Symptoms• Often asymptomatic initially• ↓ Urine output• Oedema, fatigue, confusion• Classic AKI signs post-contrast📌 Differential Diagnosis• Pre-renal AKI (hypovolaemia)• Acute tubular necrosis• Drug-induced nephritis• Post-renal obstruction📌 Diagnosis• ↑ Serum creatinine ≥25% from baseline within 3 days• ↓ eGFR• Urinalysis: proteinuria, casts• Exclude other AKI causes💡 Always compare pre- and post-contrast creatinine📌 Management• Prevention is keyIV 0.9% NaCl: 1mL/kg/hr 12h before + 12h afterHold metformin for 48h post-contrastUse low/iso-osmolar agents• Supportive careMonitor fluids, electrolytesAvoid further nephrotoxinsDialysis if severe AKI🧪 N-acetylcysteine no longer recommended📌 Complications• CKD progression• Electrolyte imbalances• Temporary or permanent dialysis📌 Prognosis• Often reversible with early recognition• Full recovery in days–weeks in most cases• ↑ risk of long-term damage if baseline CKD or recurrent episodes📎 More MSRA Resources for Nephrotoxicity due to Contrast Media📝 Revision Notes: https://www.passthemsra.com/topic/nephrotoxicity-due-to-contrast-media-revision-notes/🧠 Flashcards: https://www.passthemsra.com/topic/nephrotoxicity-due-to-contrast-media-flashcards/💬 Accordion Q&A Notes: https://www.passthemsra.com/topic/nephrotoxicity-due-to-contrast-media-accordion-qa-notes/🚀 Rapid Quiz: https://www.passthemsra.com/topic/nephrotoxicity-due-to-contrast-media-rapid-quiz/🎓 Full Course: https://www.passthemsra.com/courses/renal-for-the-msra/#MSRA #MSRARevision #MSRATextbook #MSRAQuiz #MSRAQuestionBank #MSRAFlashcards #MSRAQ&ANotes #MSRAAccordions #MultiSpecialityRecruitmentAssessment #MSRAOnlineRevision #MSRARevisionWebsite #ContrastNephropathy #RenalMSRA