Pneumonia (Zatürre) is a disease characterized by fluid accumulation in the lungs as a result of an inflammatory process. This inflammation is triggered by infectious organisms (bacteria, viruses) or respiratory irritants (such as aspirated substances). Infectious pneumonia types include community-acquired pneumonia (CAP), hospital-acquired pneumonia (HAP), and pneumonia in immunocompromised patients. Pneumonia can lead to respiratory failure by impairing gas exchange. It generally has a favorable course in individuals with healthy lungs and adequate immune defense; however, bacterial pneumonia is the fifth leading cause of death in patients with low bodily resistance.
Risk Factors
For Infectious Pneumonia
- Chronic diseases (COPD, asthma, bronchiectasis, cystic fibrosis), cancer (especially lung cancer)
- Undergoing abdominal or thoracic surgery, atelectasis, aspiration
- Upper respiratory tract infections (such as common cold)
- Smoking, alcohol consumption, inadequate nutrition
- Sickle cell anemia, tracheostomy, immunosuppressive therapy
- Immobility, reduced activity level, exposure to harmful gases
For Aspiration Pneumonia
- Advanced age
- Nasogastric (NG) tube feeding
- Impaired swallowing reflex, poor oral hygiene
- Reduced level of consciousness
Pathophysiology
The lower respiratory tract may be exposed to microorganisms through inhaled air, aspiration of food or liquid into the airway, microorganisms entering via the bloodstream, or contact with contaminated medical instruments. After entering the body, these microorganisms multiply and initiate infection.
- Bacterial Pneumonia: Bacteria cause inflammation and fluid accumulation in the lung’s air sacs (alveoli). This results in areas where air intake is reduced but blood flow continues. Blood pools in these regions and the alveoli fill with fluid or blood. Consequently, parts of the lung become consolidated (atelectasis develops). In severe cases, lung tissue hardens and may assume a dense, liver-like consistency.
- Viral Pneumonia: Viruses first damage cells in the small airways, causing inflammation and cell loss. They then spread to affect mucus-producing cells and reach the alveoli. The alveoli fill with blood and fluid, making breathing difficult.
- Aspiration Pneumonia: When stomach contents or harmful liquids enter the lungs, the lung’s protective layer (surfactant) is damaged and air sacs collapse. Acidic fluids burn the airways, while small particles may later promote bacterial growth, leading to secondary infection.
Clinical Findings
Five Key Symptoms of Early Bacterial Pneumonia
- Cough
- Production of sputum
- Chest pain
- Chills (severe shivering)
- Fever
Other Findings
Decreased blood oxygen levels (hypoxemia), increased respiratory rate, elevated white blood cell count (leukocytosis), and abnormalities in blood gas values are commonly observed.
Treatment Approach
Initial Treatment Approach
- Treatment initiated based on clinical observation before diagnosis is critical. Decisions regarding hospitalization and antibiotic selection are determined according to the patient group (CAP/HAP).
- Hospital-Acquired Pneumonia (HAP): Parenteral (intravenous) therapy is initiated in all patients. If a clinical response is achieved, transition to oral therapy is made.
- Community-Acquired Pneumonia (CAP): Treatment duration varies between 5 and 10 days depending on disease severity, causative agent (e.g., presence of bacteremia), and patient response. Antibiotics are continued for an additional 5–7 days after fever resolves.
Combination Therapy
- In pneumonias caused by Pseudomonas aeruginosa, combination antibiotic therapy may be applied, taking local resistance patterns into account.
Evaluation of Treatment Response
- Resolution of fever, improvement in general condition, decline in leukocytosis, and normalization of blood gas values are the first indicators of successful treatment.
Prevention
Methods to Reduce the Incidence and Mortality of CAP
- Control of chronic diseases (COPD, diabetes, etc.)
- Balanced nutrition and hygienic measures
- Management of smoking and alcohol use
- Regular administration of pneumococcal and annual influenza vaccines
- Providing medical support to CAP patients to quit smoking
Patient and Family Education
Important elements of patient and family education are outlined below.
Vaccination
Influenza Vaccine
Pneumococcal Vaccine
Environmental Protective Measures
Smoking Cessation Support
Nutrition and Rest
Follow-up and Emergency Situations
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