Opthal: Nasolacrimal Duct Obstruction: Free MSRA Podcast

👁️ Nasolacrimal Duct Obstruction (NLDO) – Rapid Deep Dive for the MSRAA high-yield look at blocked tear ducts – a common cause of persistent watery eyes in infants, but also seen in adults. Master the causes, red flags, and treatment strategies for your MSRA prep.🧠 Definition• NLDO = blockage of the duct draining tears from the eye to the nose• Leads to epiphora (watery eyes), sticky discharge, and infection risk📋 Causes• Congenital: Most common in infants; usually resolves by 1 year• Acquired: Infections, inflammation, trauma, age-related changes• Rare: tumours, nasal abnormalities⚠️ Risk Factors• Infants (congenital anomaly)• Older age• Chronic sinus disease• Eye/nasal trauma or surgery• Family history (minor risk)🔬 Pathophysiology• Blocked duct = tear buildup• Increases infection risk (e.g., conjunctivitis, dacryocystitis)• Most infant blockages occur at the valve of Hasner🔎 Differential Diagnosis• Conjunctivitis• Congenital dacryocystocele (bluish swelling)• Congenital glaucoma – red flag! → Mnemonic: Cloudy Big Light (Cloudy cornea, Big eye, Light sensitivity)• Corneal abrasion📊 Epidemiology• Affects ~5–20% of newborns• Slightly more common in girls• 50%+ resolve by 12 months with conservative care👁️ Clinical Features• Watery eyes, sticky discharge, crusted lashes• Recurrent conjunctivitis• Mild redness or eyelid maceration (esp. in babies)• Usually bilateral but can be unilateral🧪 Investigations• Clinical diagnosis• Fluorescein dye disappearance test: Retained dye = likely blockage• Imaging/dacryocystography: if unclear or surgical planning💊 Management• Infants: – Conservative: Gentle lacrimal massage + eyelid hygiene – If infected: topical antibiotics – If persists >12 months: probing under GA (± stents if needed)• Adults/persistent: – Treat cause (e.g., sinusitis) – Dacryocystorhinostomy (DCR) surgery – Rarely: stents/intubation for refractory cases🚨 Complications• Recurrent infections (conjunctivitis, dacryocystitis)• Corneal irritation• Abscess/orbital cellulitis (rare)• Procedure risks: failed probing, bleeding, scarring📈 Prognosis• Excellent in infants—most resolve conservatively• Probing is very effective• Adults: excellent prognosis with appropriate treatment🎯 Key Revision Points• Persistent watery eye in infant? → Think NLDO• Massage first-line in babies; most resolve <1 year• If persists: probing → DCR if needed• Rule out congenital glaucoma in any watery red-eyed infant• Refer if recurrent infections or fails conservative treatment📚 NLDO MSRA Resources:📝 Revision Notes:https://www.passthemsra.com/topic/nasolacrimal-duct-obstruction-revision-notes/🧠 Flashcards:https://www.passthemsra.com/topic/nasolacrimal-duct-obstruction-flashcards/📖 Accordion Q&A:https://www.passthemsra.com/topic/nasolacrimal-duct-obstruction-accordion-qa-notes/🎯 Rapid Fire Quiz:https://www.passthemsra.com/topic/nasolacrimal-duct-obstruction-rapid-quiz/🧪 Full Quiz:https://www.passthemsra.com/quizzes/nasolacrimal-duct-obstruction/🌐 More Revision:https://www.passthemsra.com | https://www.freemsra.com#MSRA #NasolacrimalDuctObstruction #BlockedTearDuct #Ophthalmology #MSRARevision #PasstheMSRA #FreeMSRA #Epiphora #GPTraining #CongenitalConditions