Lung Function Test - Healtopedia Malaysia - Buy Now, Pay Later Health Screening in Malaysia

Lung Function Test


Lung Function Test (a.k.a. Pulmonary Function Test) is a variety of test to determine how well your lungs work. The most basic test that is given is spirometry which is a test to measure the rate of airflow and lung size.

What Facts?

Lung Function Test (a.k.a. Pulmonary Function Test) is a variety of tests that would measure how well your lungs work including spirometry and lung volume tests. All of tests are conducted to diagnose lung and airway diseases, comparing the lung function according to its expectations and to monitor whether the treatment is working.


Lung Function Test is used to test you lungs for doctors to diagnose lung diseases such as:

  • Asthma
  • Allergies
  • Chronic bronchitis
  • Chronic obstructive pulmonary disease (COPD)
  • Damaged or scarred lung tissue
  • Disease caused by breathing in asbestos fibers
  • Sarcoidosis, a collection of inflammatory cells around organs
  • Lung cancer
  • Infections
  • Thickened, stretched, or enlarged airways
  • Thickening or hardening of your connective tissues, known as scleroderma
  • Weakness of the muscles in the wall of the chest

With the Lung Function Test, the doctor may get a precise diagnosis to assign the right treatment. These tests is the first thing that is necessary to be done in order to treat lung diseases

What Causes?

Blood draws are routine procedures and rarely cause any serious side effects. However, the risks of giving a blood sample can include:

  • bleeding under the skin, or hematoma
  • excessive bleeding
  • fainting
  • infection

How to Identify?

Your doctor will give you complete instructions on how to prepare for the blood sample portion of the test.

Certain medications and foods may affect levels of these enzymes and proteins in your blood. Your doctor may ask you to avoid some types of medications, or they may ask you to avoid eating anything for a period of time before the test. Be sure to continue drinking water prior to the test.

You may want to wear a shirt with sleeves that can easily be rolled up to make it easier to collect the blood sample.

What Symptoms?

Symptoms of a liver disorder include:

  • weakness
  • fatigue or loss of energy
  • weight loss
  • jaundice (yellow skin and eyes)
  • fluid collection in the abdomen, known as ascites
  • discolored bodily discharge (dark urine or light stools)
  • nausea
  • vomiting
  • diarrhea
  • abdominal pain
  • abnormal bruising or bleeding

Your doctor may order a liver function test if you’re experiencing symptoms of a liver disorder. The different liver function tests can also monitor the progression or treatment of a disease and test for the side effects of certain medications.

What to Do?

All of the variety of tests that were included in the Lung Function Test is listed down below:

  • Spirometry : This test is to measure the rate of air flow and estimates the lung size. 
  • Lung Diffusion Capacity : This test is used to measure how well oxygens move from your lungs into your blood. 
  • Pulse Oximetry : This test will estimate oxygen levels in your blood.
  • Arterial Blood Gas Tests: This test will measure the level of gases such as oxygen and carbon dioxide in your blood taken from one of your arteries.
  • Fractional Exhaled Nitric Oxide Tests: This test is to measure how much nitric oxide is in the air as you exhale.

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