Ear Infections | Clinical Medicine

Premium Member Resources: https://ninjanerd.org Ninja Nerds! In this lecture, Professor Zach Murphy delivers a comprehensive, high-yield breakdown of Ear Infections, guiding you through the clinical logic for diagnosing and managing common infections of the external ear, middle ear, and surrounding structures. This video builds a clear framework for understanding why patients present with ear pain, fever, hearing changes, and drainage, and for choosing the right next step while avoiding confusion. We begin by reviewing the essential anatomy and physiology of the ear, including the external auditory canal, tympanic membrane, Eustachian tube function, and the middle ear space. Zach then transitions to acute otitis media, focusing on the pathophysiology of Eustachian tube dysfunction, the most common pathogens, classic exam findings such as a bulging, erythematous tympanic membrane with decreased mobility, and when observation versus antibiotics is the best approach. You will also learn how to identify otitis media with effusion and avoid unnecessary antibiotic use when the clinical picture does not match an acute bacterial infection. Next, the lecture covers otitis externa and key differentiators from middle ear disease, including pain with manipulation of the pinna or tragus, canal edema, and common risk factors such as water exposure and trauma from swabs. Zach also walks through high-yield complications and red flags, including malignant otitis externa in patients with diabetes mellitus or immunocompromised, mastoiditis, tympanic membrane perforation, and the clinical clues that should prompt urgent evaluation. This lecture concludes with an exam-focused comparison of the most commonly tested ear infection syndromes across USMLE, COMLEX, and PANCE, tying together presentation patterns, otoscopic findings, and first-line treatments in a way that helps you answer questions fast and confidently. Whether you are learning this for the first time or tightening up your board prep, this lecture will give you the tools you need to master ear infections. Enjoy the lecture and please support us below! Table of Contents: 0:00 Lab 0:52 Pathophysiology of Ear Infections 23:59 Classic Findings of Acute Otitis Externa 28:53 Classic Findings of Acute Otitis Media 37:20 Complications of Acute Otitis Externa 44:56 Malignant Otitis Externa 52:38 Complications of Acute Otitis Media 1:25:46 Diagnostic Approach to Ear Infections 1:43:40 Treatment of Ear Infections 2:04:40 Comment, Like, SUBSCRIBE! 🌐 Official Links Website: https://www.ninjanerd.org Podcast: https://podcast.ninjanerd.org Store: https://merch.ninjanerd.org 📱 Social Media https://www.tiktok.com/@ninjanerdlectures https://www.instagram.com/ninjanerdlectures https://www.facebook.com/ninjanerdlectures https://x.com/ninjanerdsci/ https://www.linkedin.com/company/ninja-nerd/ 💬 Join Our Community Discord: https://discord.gg/3srTG4dngW #ninjanerd #infectiousdisease #earinfections