lung ultrasound explained

Overview

Lung ultrasound is a painless imaging test that uses sound waves to create pictures of your lungs and the space around them. It is often done at the bedside, so you don't need to go to a special room. It helps doctors quickly check for problems like fluid, infection, or collapsed lung.

Lung ultrasound is becoming more common in hospitals, emergency rooms, and GP clinics. Many doctors now use it as a first-line test for breathing problems.

Anyone who has breathing difficulties, chest pain, or suspected lung problems may have a lung ultrasound. It is especially useful for people who cannot easily move to a radiology department, such as those in intensive care.

Symptoms

Common symptoms

• Shortness of breath
• Chest pain
• Persistent cough
• Fever with breathing difficulty
• Unexplained rapid breathing

Symptoms in children

• Fast breathing
• Coughing that won't stop
• Difficulty feeding due to breathing
• Blue tint to lips or skin (call emergency)

Symptoms in older adults

• Sudden confusion or drowsiness with breathing problems
• Increased shortness of breath during normal activities
• Swelling in legs or ankles (fluid buildup)

Causes

Main causes

• Pneumonia (infection in the air sacs)
• Pleural effusion (fluid around the lung)
• Pneumothorax (collapsed lung)
• Pulmonary edema (fluid in lungs due to heart problems)
• Interstitial lung disease (scarring)

Risk factors

• Smoking
• Recent surgery on the chest or abdomen
• Weakened immune system (e.g., from HIV, chemotherapy)
• Chronic lung disease (e.g., COPD, asthma)
• Heart disease
• Prolonged bed rest or immobility

When to see a doctor

See a doctor urgently if:

• If you have sudden, severe trouble breathing
• If you have chest pain that is new or severe
• If you cough up blood

Book a routine appointment if:

• If you have a cough that lasts more than a few weeks
• If you feel short of breath with mild activity
• If you have unexplained weight loss and cough

Diagnosis

Lung ultrasound is usually done by a doctor or sonographer. You lie on your back or sit up, and a small handheld device (transducer) is pressed against your chest with some gel. It sends sound waves that create real-time images on a screen. The test is painless and takes about 5–10 minutes.

Tests that may be done

• Lung ultrasound
• Chest X-ray (sometimes done before or after)
• Blood tests (to check for infection or oxygen levels)
• CT scan (if more detail is needed)

What to expect at your appointment

You will be asked to remove clothing from your upper body and lie down. The gel used is warm and water-soluble. You may need to breathe deeply or hold your breath briefly. The doctor may move the probe to different spots on your chest. There are no after-effects, and you can return to normal activities right away.

Treatment

Treatment depends on what the lung ultrasound shows. If a problem is found, your doctor will discuss the next steps. This may include medicines, procedures, or lifestyle changes.

Self-care at home

• Rest and stay hydrated
• Take over-the-counter pain relief for discomfort (but always check with your doctor first)
• Monitor your symptoms and watch for changes

Medical treatments

Depending on the cause, treatments may include antibiotics for infection, diuretics (water pills) to remove extra fluid, or oxygen therapy to help breathing. In some cases, a needle or tube may be used to drain fluid or air from around the lung. Do not start any new medicine without talking to your doctor.

When is surgery considered?

Surgery is rarely needed for the conditions found on lung ultrasound. However, if there is a large pneumothorax (collapsed lung) that does not improve, or if there is a persistent air leak, surgical repair might be necessary. Your doctor will explain if surgery is an option.

Living with this condition

Depending on the condition found, you may need to adjust your daily activities. For example, if you have heart failure, you might need to limit salt and fluid. If you have a lung infection, you may need to rest until it clears.

Lifestyle tips

• Quit smoking if you smoke
• Avoid exposure to secondhand smoke and air pollution
• Get recommended vaccinations (flu, pneumonia)
• Stay active as tolerated

Diet and exercise

Eat a balanced diet rich in fruits, vegetables, and whole grains. Regular, gentle exercise like walking can help your lung health. Always follow your doctor’s advice about how much activity is safe for you.

Mental health and emotional wellbeing

Having a lung problem can be worrying. It is normal to feel anxious or overwhelmed. Talk to your doctor about how you are feeling. They can support you or refer you to a counselor.

Prevention

Not all lung problems can be prevented, but you can lower your risk by not smoking, washing your hands often, staying active, and getting vaccinated.

Vaccines

Vaccines for flu, pneumonia, and whooping cough can prevent some serious lung infections. Ask your doctor which vaccines are right for you.

Screening programmes

There is no routine screening test for lung problems using ultrasound. Your doctor may recommend a lung ultrasound if you have symptoms or risk factors.

Complications

If left untreated

• If the condition found on ultrasound is not treated, it can get worse. For example, pneumonia can lead to sepsis, or a pneumothorax can cause a tension pneumothorax (life-threatening).
• Fluid around the lung can cause the lung to collapse and make breathing very difficult.

Long-term outlook

With early diagnosis and proper treatment, most lung problems found on ultrasound can be managed well. Many people recover fully. Your outlook depends on the specific condition and your overall health. Your doctor can give you more personalized information.

Find support

External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.