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Severe pneumonia. When and why to hospitalize
1Indiana University School of Medicine, Division of Infectious Diseases, Indianapolis 46202, USA. kohler@iupui.edu
Postgraduate Medicine
|May 1, 1999
Summary
Objective criteria can now predict severe community-acquired pneumonia (CAP) outcomes in at-risk patients. Early identification aids in timely intervention for better prognosis and management of this common respiratory illness.
Area of Science:
- Medicine
- Pulmonology
- Infectious Diseases
Background:
- Community-acquired pneumonia (CAP) poses significant health risks, necessitating accurate outcome prediction.
- Identifying patients at high risk for adverse outcomes is crucial for effective management.
- Current understanding of CAP etiology and diagnostic limitations impacts treatment strategies.
Purpose of the Study:
- To review objective criteria for predicting adverse outcomes in community-acquired pneumonia (CAP).
- To discuss the major and less common causative agents of severe pneumonia.
- To evaluate current diagnostic approaches and empirical treatment regimens for CAP.
Main Methods:
- Review of existing literature on objective criteria for CAP risk stratification.
- Analysis of etiological factors contributing to severe pneumonia.
- Examination of diagnostic methods, including Gram's stain and cultures.
- Assessment of recommended empirical treatment guidelines from major medical societies.
Main Results:
- Objective criteria, including age, comorbidities (neoplastic disease), and clinical/laboratory findings (altered mental status, hypotension, tachycardia, tachypnea, fever, acidemia, azotemia, hypoxemia, hyperglycemia, anemia, hyponatremia), predict poor CAP outcomes.
- Key pathogens identified include Streptococcus pneumoniae, Haemophilus influenzae, and Legionella pneumophila.
- Diagnostic challenges persist, though sputum Gram's stain and blood/sputum cultures offer some utility.
- Empirical treatment regimens from organizations like the American Thoracic Society and Infectious Diseases Society of America are available.
Conclusions:
- Objective criteria enable risk stratification for patients with community-acquired pneumonia (CAP).
- Accurate microbial diagnosis remains a challenge, impacting targeted therapy.
- Further development of diagnostic tools is needed to enable narrow-spectrum antibiotic use and mitigate resistance.
- Current empirical treatment guidelines provide a framework for managing CAP.