Chapter 25: Nasal Symptoms & Sinus Congestion Evaluation

Nasal Symptoms & Sinus Congestion Evaluation begins by outlining the functional anatomy of the upper respiratory tract, specifically the humidifying and filtering roles of the nasal turbinates and the drainage pathways of the paranasal sinuses—the maxillary, frontal, ethmoid, and sphenoid sinuses—through the osteomeatal complex. The text details the diagnostic reasoning process, guiding clinicians to evaluate key historical factors such as the duration of symptoms, precipitating triggers, and the specific location of facial pain; for instance, identifying that maxillary sinusitis often presents as dental pain while frontal sinusitis typically causes morning headaches. A significant portion of the chapter differentiates between the various types of rhinitis, including infectious rhinitis characterized by erythematous mucosa and purulent discharge, allergic rhinitis mediated by IgE responses to seasonal or perennial allergens which presents with pale, boggy turbinates and clear rhinorrhea, and nonallergic forms like rhinitis medicamentosa caused by the rebound effect of topical decongestants. The discussion extends to chronic sinusitis, defining it by prolonged inflammation often exacerbated by anatomical obstructions such as nasal polyps, septal deviations, or adenoid hypertrophy, particularly in pediatric populations. Physical examination techniques are thoroughly described, ranging from the inspection of external signs like "allergic shiners" and the "allergic salute" to the use of a nasal speculum for visualizing the middle meatus and transillumination to assess sinus fluid levels. Furthermore, the summary covers red flags for serious complications like periorbital cellulitis and osteomyelitis of the frontal bone, and evaluates the utility of diagnostic studies, including nasal smears for eosinophilia, C-reactive protein levels, and Computed Tomography (CT) scans as the gold standard for visualizing chronic sinus pathology.