Pulmonary function tests (PFTs) are a group of non-invasive tests that assess how well your lungs are working by measuring airflow, lung capacity, and how efficiently oxygen moves into your bloodstream. A lung doctor Singapore may recommend these tests to help diagnose respiratory conditions, monitor the progression of existing lung diseases, or evaluate how well treatment is working over time. PFTs play an important role in identifying breathing problems early and guiding appropriate care based on your individual needs.
If you would like to learn more about lung doctor in Singapore, understanding when and why pulmonary function tests are performed is a good place to start. This article explains the common types of PFTs, when they are recommended, what to expect during testing, and how the results are interpreted.
What Are Pulmonary Function Tests?
Pulmonary function tests (PFTs) are a group of diagnostic tests that evaluate how well your lungs function. They provide valuable information about your breathing by measuring several aspects of lung performance, including:
- Lung volume – the amount of air your lungs can hold.
- Airflow – how quickly and efficiently air moves in and out of your lungs.
- Gas exchange – how effectively oxygen passes from your lungs into your bloodstream.
Rather than relying on a single measurement, pulmonary function testing often involves different tests that assess specific aspects of lung function. Together, these results give a more comprehensive picture of your respiratory health, helping a doctor distinguish between different types of lung conditions and determine whether further evaluation or treatment is needed.
When Would a Lung Doctor Singapore Recommend Pulmonary Function Tests?
A lung doctor Singapore may recommend pulmonary function tests if you have symptoms that suggest an underlying respiratory condition or if there is a need to monitor your lung health over time. These tests help determine whether your lungs are functioning normally and can support the diagnosis and management of various breathing disorders.
Common reasons for pulmonary function testing include:
- Persistent cough that does not improve
- Shortness of breath during daily activities or exercise
- Wheezing or chest tightness
- Suspected asthma or chronic obstructive pulmonary disease (COPD)
- Monitoring existing lung conditions to assess disease progression or response to treatment
- Evaluating lung function before certain surgical procedures
- Assessing the effects of long-term exposure to dust, chemicals, or other airborne irritants
The decision to perform pulmonary function tests is based on your symptoms, medical history, physical examination, and, when necessary, other investigations such as chest imaging.
Common Types of Pulmonary Function Tests
Several types of pulmonary function tests may be performed depending on your symptoms and the condition being assessed. Common tests include:
- Spirometry: Measures how much air you can inhale and exhale, and how quickly you can breathe out.
- Lung volume testing: Evaluates the total amount of air your lungs can hold.
- Diffusing capacity (DLCO): Assesses how effectively oxygen passes from your lungs into your bloodstream.
- Bronchodilator reversibility testing: Compares lung function before and after inhaling medication to determine whether airflow improves.
Not every patient requires all of these tests. A lung doctor will recommend the most appropriate combination based on your individual clinical needs.
What to Expect During the Test
Pulmonary function tests are generally straightforward and do not involve needles or surgery. Before the test, you may be advised to avoid smoking, strenuous exercise, or certain inhaled medications, depending on your doctor’s instructions. During the test, you will breathe into a mouthpiece connected to specialised equipment while following specific breathing instructions.
Some tests may require you to take deep breaths, exhale forcefully, or hold your breath briefly. The entire assessment usually takes between 30 and 60 minutes. While the tests are not painful, some people may feel temporarily lightheaded after repeated forceful breathing, but this sensation usually resolves quickly.
Understanding Your Pulmonary Function Test Results
Pulmonary function test results are interpreted alongside your age, height, sex, ethnicity, medical history, and symptoms, as these factors influence what is considered a normal range. The findings may indicate normal lung function or suggest patterns consistent with obstructive lung diseases, such as asthma or chronic obstructive pulmonary disease (COPD), restrictive lung diseases, or reduced gas exchange.
However, abnormal results alone do not confirm a specific diagnosis. A lung doctor will interpret the results together with your clinical assessment, physical examination, and, if necessary, additional investigations such as imaging or laboratory tests to determine the underlying cause and recommend appropriate management.
When to See a Lung Doctor Singapore
You should consider seeing a lung doctor Singapore if you experience persistent respiratory symptoms that do not improve or interfere with your daily activities. Early evaluation can help identify underlying lung conditions and guide appropriate treatment before complications develop.
Signs that warrant medical assessment include:
- A cough lasting several weeks
- Shortness of breath during routine activities
- Recurrent chest infections
- Persistent wheezing or chest tightness
- Reduced exercise tolerance
- Abnormal findings on a chest X-ray or CT scan
- A history of smoking or prolonged exposure to occupational lung irritants
Seeking timely medical attention can support earlier diagnosis and more effective management of respiratory conditions.
Conclusion
Pulmonary function tests are valuable tools for assessing how well your lungs work and can help diagnose, monitor, and manage a wide range of respiratory conditions. Whether you have persistent breathing symptoms or require ongoing monitoring for an existing lung condition, these non-invasive tests provide important information that supports accurate diagnosis and personalised treatment planning.
If you would like to learn more about pulmonary function testing or discuss your respiratory symptoms, book a consultation with our clinic, at:
International Centre for Thoracic Surgery – Robotic Lung Surgery | Lung Cancer Treatment Singapore
Mount Elizabeth Novena Hospital
38 Irrawaddy Road, Mt Elizabeth Novena Specialist Centre, Irrawaddy Rd, #10 38, Singapore 329563
Phone: (65) 6591 8801
