breathing procedure preparation

Overview

A breathing test (also called a lung function test) measures how well your lungs work. It checks how much air you can breathe in and out, and how quickly you can do it. Your doctor may ask you to do this test to help find the cause of breathing problems like wheezing, coughing, or shortness of breath.

Yes. Breathing tests are very common. Millions of people have them each year to check their lung health.

Anyone with lung symptoms or a known lung condition may need a breathing test. It is used for people of all ages, from children to older adults.

Symptoms

Common symptoms

• Shortness of breath
• Wheezing (a whistling sound when you breathe)
• Chronic cough lasting more than a few weeks
• Chest tightness

Symptoms in children

• Trouble keeping up with other children during play
• Frequent cough, especially at night or during exercise
• Breathing fast or flaring nostrils

Symptoms in older adults

• Feeling tired or out of breath after light activity
• Difficulty taking deep breaths
• Increased chest congestion or mucus

Causes

Main causes

• Breathing tests are not caused by a condition — they are used to check for conditions that affect the lungs.
• Common reasons for the test include suspected asthma, chronic obstructive pulmonary disease (COPD), lung scarring (pulmonary fibrosis), or monitoring an existing lung disease.

Risk factors

• Smoking or exposure to secondhand smoke
• Family history of lung disease
• Occupational exposure to dust, chemicals, or fumes
• Allergies or frequent respiratory infections

When to see a doctor

See a doctor urgently if:

• If you have any of the emergency symptoms listed above, call your local emergency services immediately.

Book a routine appointment if:

• If you have ongoing cough, wheezing, or breathlessness that does not go away, make an appointment to see your doctor.
• If you have a known lung condition and your symptoms change, ask your doctor if you need another breathing test.

Diagnosis

The breathing test itself is not a diagnosis — it is a tool to help your doctor understand your lung function. Your doctor will look at your test results along with your symptoms and medical history to make a diagnosis.

Tests that may be done

• Spirometry — you breathe into a tube to measure how much air you can blow out and how fast.
• Lung volume test — measures the total amount of air your lungs can hold.
• Diffusion capacity test — checks how well oxygen moves from your lungs into your blood.
• Peak flow test — a simple hand-held device to measure how fast you can blow air.

What to expect at your appointment

You will sit in a chair and be asked to take a deep breath, then blow into a mouthpiece as hard and fast as you can. You will do this a few times to get the best result. The test usually takes 15 to 30 minutes. You can breathe normally between attempts.

Treatment

The treatment depends on what the breathing test shows. If you are found to have a lung condition, your doctor will discuss a treatment plan that may include lifestyle changes, medicines (such as inhalers), and sometimes pulmonary rehabilitation.

Self-care at home

• Avoid smoking and secondhand smoke.
• Follow your doctor's instructions before the test (for example, not using certain inhalers that day).
• Stay hydrated and eat lightly before the test unless told otherwise.

Medical treatments

If a lung condition is diagnosed, treatment may include inhalers (bronchodilators to open airways, or anti-inflammatory medicines to reduce swelling), oral medications, oxygen therapy, or pulmonary rehabilitation (a program of exercise and education). Your doctor will choose what is right for you. No specific drug names or doses are listed here — always follow your healthcare provider's advice.

When is surgery considered?

Surgery is rarely needed for lung conditions diagnosed by a simple breathing test. In some cases, such as severe emphysema or lung cancer, surgery may be an option. Your doctor will discuss this if it applies to you.

Living with this condition

After your breathing test, you can return to normal activities right away. If you are diagnosed with a lung condition, work with your doctor to manage it. Many people with lung disease lead active, full lives with proper treatment.

Lifestyle tips

• Quit smoking if you smoke — this is the most important step for lung health.
• Avoid air pollution, dust, and strong fumes.
• Get regular exercise as advised by your doctor.
• Learn breathing techniques to help control shortness of breath.

Diet and exercise

A healthy, balanced diet helps your body work well. If you have a lung condition, eating smaller meals more often may make breathing easier. Regular exercise, such as walking or gentle stretching, can improve your breathing and energy levels. Ask your doctor what exercise is safe for you.

Mental health and emotional wellbeing

Living with a breathing problem can be stressful and may cause anxiety or low mood. It is normal to feel worried. Talk to your doctor about these feelings — they can offer support or refer you to a counsellor. You are not alone.

Prevention

You cannot always prevent the need for a breathing test, but you can take steps to keep your lungs healthy. A breathing test is a tool — it does not cause disease.

Vaccines

Get recommended vaccines, such as the flu shot and pneumonia vaccine, to prevent infections that can harm your lungs. Ask your doctor which vaccines are right for you.

Screening programmes

There is no routine screening for all lung diseases. Screening with a breathing test is usually done only if you have symptoms or are at high risk (for example, if you have a history of smoking). Your doctor will advise you.

Complications

If left untreated

• If a lung condition is not diagnosed or treated, symptoms can get worse over time.
• Poorly managed lung disease can lead to repeated infections, hospital stays, and reduced quality of life.

Long-term outlook

Most people do very well. Breathing tests are safe and help doctors find the right treatment. If you do have a lung condition, early treatment can help you breathe better and stay active. Many people with chronic lung conditions live full, satisfying lives.

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