ENT · Infectious Disease
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The most common causative pathogen in both children and adults is Haemophilus influenzae type b (Hib), though incidence has decreased significantly due to widespread vaccination.
Patients classically present with the '3 Ds': drooling, dysphagia, and distress (respiratory).
The patient typically assumes the tripod position or sniffing position to maximize airway patency.
The definitive diagnostic finding on lateral neck radiograph is the thumbprint sign, representing an edematous, enlarged epiglottis.
Direct visualization of the epiglottis via laryngoscopy is the gold standard for diagnosis but must be performed in a controlled setting (e.g., operating room) due to the risk of sudden, complete airway obstruction.
The most critical initial management step is securing the airway via endotracheal intubation or tracheostomy if respiratory failure is imminent.
Empiric antibiotic therapy must provide coverage for H. influenzae, Streptococcus species, and Staphylococcus aureus using ceftriaxone plus vancomycin.
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A 5-year-old unimmunized male is brought to the emergency department with a 6-hour history of high-grade fever, severe sore throat, and muffled voice. The child is sitting upright, leaning forward with his hands on his knees, and is drooling excessively. He appears anxious and is struggling to breathe with inspiratory stridor. A lateral neck radiograph reveals a thumbprint sign in the supraglottic region.
What is the most appropriate next step in the management of this patient?
Immediate endotracheal intubation in a controlled setting
The patient presents with classic signs of acute epiglottitis; because the condition can lead to rapid, fatal airway obstruction, the priority is securing the airway in a controlled environment (OR) before attempting any diagnostic procedures that might trigger laryngospasm.
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Etiology / Epidemiology
Primarily caused by Haemophilus influenzae type b (Hib) in unvaccinated children; now more common in adults due to widespread immunization.
Clinical Manifestations
Classic 3 Ds: drooling, dysphagia, and distress; patient presents in the tripod position.
Diagnosis
Laryngoscopy is the gold standard; lateral neck X-ray shows the thumbprint sign.
Treatment
Secure airway first; ceftriaxone plus vancomycin; do not attempt visualization in children if airway is unstable.
Prognosis
High mortality if untreated due to airway obstruction; rapid recovery with prompt intubation and antibiotics.
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Epidemiology & Etiology
Incidence has plummeted in children following the Hib vaccine rollout. Current cases often involve adults or under-immunized populations. Other pathogens include *Streptococcus pneumoniae* and *Group A Streptococcus*.
Pertinent Anatomy
The epiglottis is a leaf-shaped cartilage protecting the glottis. Inflammation causes rapid supraglottic edema, which can lead to complete airway occlusion in a narrow pediatric airway.
Pathophysiology
Bacterial invasion of the epiglottic mucosa leads to rapid-onset cellulitis. The resulting edema narrows the laryngeal inlet. This creates a high-risk environment for sudden, fatal respiratory arrest.
Clinical Manifestations
Patients present with the 3 Ds: drooling, dysphagia, and distress. The tripod position (leaning forward, neck extended) is a classic compensatory mechanism. Stridor and retractions are late-stage signs of impending airway collapse.
Diagnosis
The gold standard is direct visualization via laryngoscopy in a controlled setting. Lateral neck radiographs reveal the thumbprint sign (swollen epiglottis). Do not perform oral exams in children as this may trigger total airway obstruction.
Treatment
Prioritize airway stabilization via endotracheal intubation if respiratory distress is present. Administer ceftriaxone and vancomycin to cover common pathogens. Avoid tongue depressors and unnecessary agitation of the patient.
Prognosis
Prognosis is excellent with timely intubation and IV antibiotics. Complications include epiglottic abscess and sepsis. Patients require ICU admission for continuous airway monitoring.
Differential Diagnosis
Croup: presents with a barking cough and steeple sign
Bacterial tracheitis: presents with thick, purulent secretions
Peritonsillar abscess: presents with a hot potato voice and uvular deviation
Foreign body aspiration: sudden onset without fever
Angioedema: rapid swelling without infectious prodrome