Diagnosis and treatment of community-acquired pneumonia

This is an automatically translated article.

The article is professionally consulted by Master, Doctor Nguyen Huy Nhat - Department of Medical Examination & Internal Medicine - Vinmec International General Hospital Da Nang.
Community-acquired pneumonia is a common respiratory infection that can progress to severe local and systemic complications or even death. Early diagnosis and treatment of community-acquired pneumonia, killing the right cause of the disease will help avoid unfortunate complications for the patient.

1. Diagnosis of community-acquired pneumonia

1.1 Definitive diagnosis The disease has a sudden onset, with favorable factors for pneumococcal pneumonia such as splenectomy, immunosuppression, chronic alcoholism, sickle cell disease; Having chills and high fever 39°C - 40°C. Chest pain is sometimes very prominent. Cough and expectoration of rust-colored sputum or green sputum, purulent sputum, dry lips, dirty tongue, elevated blood white blood cells. Pulmonary consolidation syndrome: dull percussion, increased vocal chords, decreased alveolar murmurs, tube murmurs; Standard chest x-ray shows: Alveolar filling syndrome, pleural effusion or thick interlobular fissure may be present. Nodular, opacified reticular lesions suggest atypical bacterial pneumonia. However, radiographs are not specific for the etiology. If pneumonia is suspected, your doctor may recommend the following tests:
Blood tests: Blood tests are used to confirm an infection and try to identify the type of organism causing the infection. However, accurate identification is not always possible; Chest X-ray: This helps the doctor diagnose pneumonia and determine the extent and location of the infection. However, this method cannot tell the doctor which germ is causing the pneumonia; Sputum test: A sample of fluid from your lungs (sputum) is taken after a deep cough and analyzed to help determine the cause of the infection. Your doctor may order additional tests if you are over 65 years old, are in the hospital, or have severe symptoms. These may include:
CT scan: If your pneumonia is not as clear as expected, your doctor may recommend a chest CT scan to get a more detailed picture of your lungs; Pleural fluid culture: A sample of fluid is obtained by placing a needle between your ribs from the pleural area and analyzed to help determine the type of infection.

1.2. Diagnosis of microbiological causes When patients are hospitalized, especially in severe cases, it is necessary to conduct cultures and make antibiotic charts with specimens such as sputum, bronchial fluid (flexible bronchoscopy - bronchoscopy with catheters with high blood pressure). protective plug, alveolar lavage), pleural fluid if there is blood. Transfer specimen to microbiology laboratory within 1 hour; Indirect methods: Immunofluorescence, complement agglutination test, specific serology for bacteria that are difficult to culture (Legionelle Pneumoniae, Mycoplasma Pneumoniae, Chlamydia Pneumoniae) or viruses; Detection of soluble bacterial antigens in urine. PCR (chain amplification reaction) with some bacteria, viruses. These tests are especially necessary during outbreaks for early detection and classification of patients. 1.3 Differential diagnosis of Atelectasis: The mediastinum is pulled to the side of the collapsed lung, the diaphragm is raised; Pleural effusion : Pleural puncture or ultrasound to confirm; Superinfected bronchiectasis: There is a history of fever, long-lasting cough and purulent sputum. The X-ray picture can sometimes be an uneven opacity resembling a localized bronchial inflammation. Contrast-enhanced PQ scan or well-defined CT Scan of the lung; Tuberculosis: Blurred lesions, uneven nodular infiltrates in the apex of the lung. It is necessary to stain Ziel Nelsen for AFB in sputum, bronchial fluid, culture for BK in sputum, bronchial fluid on classical media (Lowenstein) and, if possible, culture on MGIT Bactec medium for early detection. tuberculosis and determine the level of susceptibility to antibiotics; Pulmonary embolism causing pulmonary infarction: There are symptoms of severe chest pain, sometimes shock, fever, hemoptysis, usually occurs in people with heart disease, or surgery in the pelvis, immobilization of the lower extremities. The manifestations of infection are not many, signs of peripheral venous occlusion, clinical and electrocardiographic acute bronchiectasis (image S1 Q3). Computed tomography of the lungs with intravenous contrast injection using a spiral CT machine or a multi-detector machine will allow reconstruction of the pulmonary artery, clearly showing the occluded artery; Pneumonia with autoimmune mechanism due to drug use: Ask carefully the drug history, pay special attention to drugs that cause pneumonia such as cordaron... Symptoms will decrease or disappear when the drug is stopped early; Atypical subacute pulmonary edema: Try diuretics and repeat chest radiographs.

2. When is community-acquired pneumonia hospitalized?

You may be hospitalized if you have the following:
Over 65 years old; Renal function decline; Systolic blood pressure less than 90 mmHg or diastolic blood pressure equal to or less than 60 mmHg; Very rapid breathing (30 breaths or more a minute); Need respiratory support; Body temperature below normal; Heart rate below 50 or above 100.

3. How to treat community-acquired pneumonia?

3.1. Principles of treatment Early antibiotic treatment for patients with bacterial pneumonia; Use antibiotics that are effective against the cause of the disease, paying attention to the drug resistance of local bacteria; Pay attention to the history of drug allergies, drug interactions; Usual antibiotic time is about 10 days, except for some special cases; Strictly follow the principles of pharmacodynamics and pharmacokinetics of antibiotics. For time-dependent antibiotics, it is necessary to maintain high blood concentrations for a long time to ensure bactericidal effectiveness.

3.2 Specific Treatment Treatment for pneumonia includes curing the infection and preventing complications. People with community-acquired pneumonia can often be treated at home with medication. Although most symptoms subside within a few days or weeks, the feeling of fatigue can last for a month or more.
Specific treatment depends on the type and severity of pneumonia, your age and overall health. Options include:
Antibiotics: These drugs are used to treat bacterial pneumonia. Use empiric antibiotics, then wait for the results of the antibiogram and treat according to the results of the antibiogram; Fever reducer/pain reliever: You can take these as needed to reduce fever and discomfort. These include medications such as aspirin, ibuprofen (Advil, Motrin IB, others), and acetaminophen (Tylenol, others). 3.3 Treatment at home Get plenty of rest: Do not return to school or work until your body temperature returns to normal and you stop coughing up mucus; Stay hydrated: Drink plenty of fluids, especially plain water, to help loosen mucus in the lungs; Take medication as prescribed: Strictly follow the entire course of treatment prescribed by your doctor. If the medication is stopped too soon, the bacteria in the lungs can continue to multiply and cause pneumonia to return. Doctor Nguyen Huy Nhat has many years of experience in the field of respiratory disease treatment at Hue Central Hospital, Hoan My General Hospital, .. before being a doctor of General Internal Medicine Department of National General Hospital. Vinmec Danang International.
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