About this procedure
Lung and pleural ultrasound helps identify fluid around the lungs and selected abnormalities of the lung surface and pleura. It is one tool in respiratory assessment, not a replacement for every chest test.
What the examination or consultation can show
This scan is particularly useful when a clinician suspects pleural effusion, wants to monitor fluid or needs further information about accessible lung-surface changes. The presence of an ultrasound pattern is not a diagnosis on its own.
When an assessment may help
A person with breathlessness, chest discomfort, suspected pleural fluid or a respiratory infection may be referred when a specific clinical question can be answered by ultrasound. Some pneumonias close to the pleura may produce visible changes.
Important limitations and differences
Air prevents ultrasound from seeing much of the deeper lung tissue. A normal scan cannot rule out every pneumonia, pneumothorax, pulmonary embolism or other chest emergency. Chest X-ray, CT and clinical examination may still be essential.
Preparation and procedure
The clinician scans between ribs over the front, sides or back of the chest, possibly asking for a different position or a deep breath. Preparation is usually unnecessary; clothing should allow access to the chest. Bring relevant previous imaging.
Next steps and follow-up
Ultrasound is diagnostic and does not itself treat fluid or infection. The result supports decisions about further assessment, observation or appropriate treatment. Do not start medicines solely from the ultrasound image.
When to seek urgent care
Sudden severe breathlessness, blue lips, intense chest pain or impaired consciousness is an emergency. Call 103 at once; do not wait for a planned ultrasound of the lungs or pleura.
Related health information
Shortness of breath in adults; Persistent cough in children; Cough.
Signs and symptoms
Diagnosis and tests
Care and treatment approaches
When to seek urgent care
Frequently asked questions
Can lung ultrasound detect pneumonia?
It can show some peripheral changes associated with pneumonia, but not all infections. Diagnosis needs the wider clinical picture.
Can ultrasound show fluid around the lungs?
Yes. Pleural fluid is often visible, and the scan may help estimate its distribution and approximate volume.
Does lung ultrasound replace a chest CT?
No. Ultrasound and CT have different strengths, indications and limitations.
Important information
A medical consultation is needed for diagnosis and treatment recommendations.
Self-treatment can be harmful to your health.
