Renal: Acute Interstitial Nephritis: Free MSRA Podcast

🎧 FREE MSRA PODCAST – Acute Interstitial Nephritis: Crack the Renal Section!Struggling to remember those kidney inflammation causes? Need a rapid, high-yield summary for AIN before your MSRA exam or clinical placement? This episode is for you! We break down acute interstitial nephritis (AIN) with revision pearls, UK guidelines, and classic exam clues – in minutes.🧠 Key Learning PointsDefinition• Acute interstitial nephritis (AIN) = Inflammation of the renal interstitium (the tissue between kidney tubules), mostly due to a hypersensitivity/immune reaction.Causes• Top trigger: Drugs! - Common: NSAIDs, antibiotics (penicillins, cephalosporins), PPIs, diuretics• Infections: Bacterial (e.g. streptococci), viral (EBV, HIV, Hantavirus)• Autoimmune: SLE, Sjögren's syndrome• Systemic: Sarcoidosis• Chronic form (CTIN): Linked to long-term analgesic use, lithium, heavy metals (but focus on acute for MSRA!)Risk Factors• Recent start/dose increase of culprit drug• Drug allergy history• Recent infection, autoimmune or systemic diseasePathophysiology• Usually immune-mediated (hypersensitivity), with infiltration of lymphocytes/eosinophils into interstitium• Damages tubules → AKIClinical Features• Sudden AKI (oliguria, raised creatinine, fluid overload)• “Classic triad” (fever, rash, eosinophilia) = rare• More typical: Reduced urine, proteinuria, haematuria, sterile pyuria• Can be asymptomatic – need a high index of suspicion, especially with new drug history!Diagnosis• Urine: WBCs, RBCs, sometimes eosinophils• Bloods: Creatinine ↑, eosinophilia• Renal ultrasound to exclude obstruction• Renal biopsy = definitive diagnosis (not always required)• Always check medication history!Management• 🚨 First step: Stop the causative drug!• Treat underlying infection/autoimmune if present• Steroids (prednisolone) may help in immune/allergic cases• BP control (ACEi/ARB unless pregnant), supportive care• Severe/irreversible: Dialysis or transplant may be neededPrognosis• Good if recognised and treated early – often reversible• Can progress to CKD or kidney failure if delayed or severeComplications• Chronic kidney disease, end-stage renal failure• Electrolyte imbalance, complications from underlying cause📎 More AIN Revision Resources:📝 Revision Notes: https://www.passthemsra.com/topic/acute-interstitial-nephritis-revision-notes/💬 Flashcards: https://www.passthemsra.com/topic/acute-interstitial-nephritis-flashcards/🧠 Q&A Notes: https://www.passthemsra.com/topic/acute-interstitial-nephritis-accordion-qa-notes/📝 Rapid Quiz: https://www.passthemsra.com/topic/acute-interstitial-nephritis-rapid-quiz/🎯 Quiz Portal: https://www.passthemsra.com/quizzes/acute-interstitial-nephritis/📚 Renal Course: https://www.passthemsra.com/courses/renal-for-the-msra/🏷️ Hashtags#MSRA #AcuteInterstitialNephritis #AIN #Renal #KidneyInjury #MSRARevision #MSRATextbook #MSRAQuiz #PassTheMSRA #FreeMSRA #UKGuidelines #AKI #RenalRevision #MSRAFlashcards #MSRAQandA