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Aspiration Syndromes: ED Presentation, Evaluation, and Management

Current guidelines for antibiotic choice for aspiration pneumonia recommend beta-lactam/beta-lactamase inhibitor or clindamycin as first-line with flagyl being ineffective for anaerobic coverage. However, more recent data strongly suggests that anaerobic coverage may not be needed and may be considered in certain at-risk groups, but otherwise standard pneumonia regimens can be used. Corticosteroids are NOT recommended in management of aspiration pneumonia or pneumonitis.

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Articles of Interest

Aspiration pneumonia and pneumonitis

Aspiration can be divided into two broad categories. This has important management implications. Aspiration of oropharyngeal contents, for example due to swallowing difficulty, will cause bacterial pneumonia with mouth organisms predominating. Aspiration of gastric contents will cause a chemical pneumonitis (e.g. Mendelson's syndrome) because the gastric contents are usually sterile, but their acidity results in the rapid development of inflammation in the lungs. There may be overlap between pneumonia and pneumonitis, but it is usually possible to make the distinction and tailor treatment accordingly.

Aspiration pneumonia and pneumonitis: a spectrum of infectious/noninfectious diseases affecting the lung

Aspiration pneumonia and pneumonitis are part of the pneumonia continuum and share similarities in pathophysiology, microbiology, and treatment. Modern microbiology demonstrates that the lung is not sterile, and isolates in aspiration pneumonia frequently include aerobes or mixed cultures. Treatment for aspiration pneumonia should include antibiotic coverage for oral anaerobes, aerobes associated with community-acquired pneumonia, and resistant organisms depending on appropriate clinical context.

Aspiration Pneumonia and Related Syndromes

Acute aspiration syndromes encompass acute respiratory decompensations that may lead to hospitalization. This category includes infectious pneumonia from carriage of oropharyngeal bacteria into the lungs, chemical pneumonitis from gastric juices, and specific clinical syndromes such as ventilator-associated pneumonia and ARDS.

Aspiration Pneumonitis and Pneumonia

Aspiration pneumonitis can present with a fever, cough, elevated WBC and CXR opacities. However, aspiration pneumonitis may not require treatment with antibiotics. Symptoms usually resolve within 24-48 hours, though some may develop secondary bacterial infections or progress to aspiration pneumonia. Use the guidelines below to differentiate from aspiration pneumonia. Aspiration pneumonia is less commonly caused by anaerobes. It is predominantly caused by gram-negative rods, so make sure to cover with a broad spectrum antibiotic, just as you would for a typical hospital-acquired pneumonia

Aspiration Syndromes and Associated Lung Injury: Incidence, Pathophysiology and Management

Aspiration syndromes and associated lung injury represent a complex health problem. Gross aspiration of liquid or particulate matter into lungs can result in severe lung injury and respiratory failure leading to hypoxemia. The initial lung injury is primarily caused by inflammatory mediators rather than bacterial infection. There is no gold standard for distinguishing between the aspiration syndromes.

Foreign body aspiration in adult airways: therapeutic approach

Foreign body (FB) aspiration is an uncommon but potentially life-threatening event, accounting for 0.16–0.33% of adult bronchoscopic procedures. While the majority of accidental aspiration events occur in children, adults represent up to 25% of cases.

Pediatric Aspiration Syndromes

Pediatric aspiration syndromes include all conditions in which foreign content are inhaled into the lungs. Most commonly, aspiration syndromes involve oral or gastric contents associated with gastroesophageal reflux (GER), dysphagia (swallowing dysfunction), neurological disorders, and structural abnormalities.