ENT: Acute Bacterial Sinusitis: Free MSRA Podcast

🎙️ MSRA Podcast – Acute Bacterial Sinusitis (ABS)A high-yield, focused breakdown of a deceptively common ENT condition that frequently comes up in the MSRA. Understand the key features, timing-based diagnosis, and when antibiotics are actually needed.🧠 Key Learning Points📌 Definition• Infection of the paranasal sinuses (frontal, maxillary, ethmoid, sphenoid)• Usually follows a viral upper respiratory infection• Often referred to as "rhinosinusitis"📌 Classification by Duration• Acute: 7–30 days• Subacute: 4–12 weeks• Chronic: >12 weeks• Recurrent: ≥3 episodes/year (≥10 days each)📌 Key Diagnostic Clue🕒 Symptoms lasting >10 days OR worsening after initial improvement → suggests bacterial cause🧠 10-day rule is critical for MSRA exams📌 Common Bacterial Pathogens• Streptococcus pneumoniae• Haemophilus influenzae• Moraxella catarrhalis📌 Risk Factors• Viral URTI, allergic rhinitis• Nasal polyps, deviated septum• Immunodeficiency, cystic fibrosis• Recent dental work• Environmental exposure (pollution, smoke)📌 PathophysiologyViral infection → mucosal swelling → blocked sinus drainage → mucus stasis → bacterial overgrowth📌 Symptoms• Facial pain/pressure• Purulent nasal discharge• Nasal obstruction• Hyposmia• Headache, fever, fatigue• Halitosis📌 Diagnosis• Clinical diagnosis based on symptom duration and severity• Imaging (CT) or labs only if complications or poor response to treatment• Avoid routine bloods or swabs unless red flags📌 Management🧴 Initial (non-antibiotic) management:• Analgesia, saline irrigation, intranasal steroids• Intranasal decongestants (short-term only)• Reassurance and observation <10 days💊 Antibiotics ONLY if:• Symptoms persist >10 days• Worsening after initial improvement• Systemically unwell or immunocompromised🧠 First-line:• Phenoxymethylpenicillin OR doxycycline• If severe or high-risk: Co-amoxiclav• Penicillin allergy: Doxycycline• Pregnancy: Erythromycin• Avoid doxycycline in children📌 Complications (Rare but serious)• Orbital cellulitis, periorbital cellulitis• Meningitis, brain abscess• Cavernous sinus thrombosis• Osteomyelitis of the frontal bone• Chronic sinusitis• Cutaneous fistula formation📚 MSRA Resources for Acute Bacterial Sinusitis📝 Revision Notes:https://www.passthemsra.com/topic/acute-bacterial-sinusitis-revision-notes/🧠 Flashcards:https://www.passthemsra.com/topic/acute-bacterial-sinusitis-flashcards/💬 Accordion Q&A Notes:https://www.passthemsra.com/topic/acute-bacterial-sinusitis-accordion-qa-notes/🚀 Rapid Quiz:https://www.passthemsra.com/topic/acute-bacterial-sinusitis-rapid-quiz/🎓 ENT Course:https://www.passthemsra.com/courses/ent-for-the-msra/🧪 Quiz Bank:https://www.passthemsra.com/quizzes/acute-bacterial-sinusitis/🔖 Hashtags#MSRA #MSRARevision #MSRATextbook #MSRAQuiz #MSRAFlashcards #MSRAQANotes #MSRAAccordions #MultiSpecialtyRecruitmentAssessment #ENT #AcuteBacterialSinusitis #Rhinosinusitis