Acute Bacterial Sinusitis Management

Diagnosis and Treatment

The American Academy of Pediatrics recommends starting amoxicillin immediately for pediatric patients with acute bacterial sinusitis presenting with a worsening course, defined as worsening or new onset of symptoms after initial URTI symptoms, without obtaining a CT scan 1, 2
The American Academy of Pediatrics explicitly states that clinicians should prescribe antibiotic therapy for children with a worsening course presentation of acute bacterial sinusitis 1, 2
Frontal sinusitis specifically requires definitive antibiotic treatment, and the French guidelines emphasize that antibiotic therapy is definitely indicated in the case of frontal, ethmoidal, or sphenoidal sinusitis 3

The American Academy of Pediatrics recommends that clinicians should not obtain imaging studies of any kind for diagnosis of uncomplicated acute bacterial sinusitis, as they do not contribute to the diagnosis in uncomplicated cases 1, 2
CT scanning is reserved exclusively for suspected complications, such as periorbital or orbital swelling with proptosis, impaired extraocular muscle function or visual changes, severe headache with altered mental status, or signs of intracranial involvement 1, 5

The American Academy of Pediatrics recommends first-line treatment with amoxicillin or amoxicillin-clavulanate for acute bacterial sinusitis, with standard dosing options including 45 mg/kg/day divided every 8-12 hours for standard-dose amoxicillin, and 90 mg/kg/day divided every 12 hours for high-dose amoxicillin-clavulanate 1, 2
High-dose amoxicillin-clavulanate is recommended for children younger than 2 years, daycare attendance, recent antibiotic exposure, geographic areas with high prevalence of resistant Streptococcus pneumoniae, or severe symptoms at presentation 1, 7
For frontal sinusitis specifically, amoxicillin-clavulanate provides broader coverage and is preferred over amoxicillin alone, according to the French guidelines 3

The American Academy of Pediatrics recommends treating acute bacterial sinusitis for 10-14 days total, with duration individualized based on clinical response but with a minimum of 10 days 3, 6
Reassessment is mandatory within 72 hours, and if the child shows worsening symptoms or failure to improve, consideration should be given to changing to a broader-spectrum antibiotic or considering complications requiring imaging 1, 2, 6