deemag and chest clinic

We are using Siemens PFT MACHINE at our clinic.

A Pulmonary Function Test (PFT), also known as a lung function test, measures how well your lungs work. It assesses lung capacity, airflow, and gas exchange to help diagnose conditions like asthma, COPD, or pulmonary fibrosis. Here’s what a patient can expect during a PFT:

Before the Test

• Preparation:
  • Avoid eating a heavy meal 2 hours before the test, as it may affect breathing.
  • Refrain from smoking or vaping for at least 4–6 hours prior.
  • Avoid alcohol, strenuous exercise, or caffeine on the day of the test.
  • Wear loose, comfortable clothing that doesn’t restrict breathing.
  • Inform your doctor about medications (e.g., inhalers). You may be asked to stop certain ones temporarily.
  • If you have a cold, flu, or respiratory infection, tell your doctor, as it may affect results and the test might be rescheduled.
• Medical History:
  • The technician may ask about symptoms, smoking history, or exposure to lung irritants.

During the Test

PFTs typically involve several tests, with spirometry being the most common. The entire session may take 30–60 minutes, depending on the tests performed.

• Setting:
  • Conducted in a hospital, clinic, or specialized lab.
  • You’ll sit in a chair, and a technician will guide you through each step.
• Spirometry (most common test):
  • You’ll breathe through a mouthpiece connected to a machine called a spirometer.
  • A nose clip ensures all air goes through your mouth.
  • You’ll be asked to:
    • Take a deep breath and exhale as hard and fast as possible.
    • Inhale deeply or hold your breath briefly.
    • Breathe normally or at a steady pace for some tests.
  • You may repeat each maneuver 3–8 times to ensure consistent results.
• Other Possible Tests:
  • Lung Volume Test: Measures total lung capacity, often done in a sealed booth (plethysmograph) where you breathe against a closed valve.
  • Diffusion Capacity Test (DLCO): Assesses how well oxygen passes into your bloodstream. You’ll inhale a harmless gas (e.g., carbon monoxide) and hold it briefly.
  • Maximal Inspiratory/Expiratory Pressure: Tests the strength of breathing muscles.
  • Fractional Exhaled Nitric Oxide (FeNO): Measures airway inflammation, often for asthma diagnosis.
• Experience:
  • The test is painless but may feel tiring due to repeated deep breathing.
  • You might feel lightheaded, short of breath, or cough briefly—these are normal and pass quickly.
  • The technician will coach you to ensure proper technique (e.g., sealing your lips tightly around the mouthpiece).

After the Test

• Recovery:
  • You can usually resume normal activities immediately.
  • If you feel dizzy or fatigued, rest briefly before leaving.
  • If you use inhalers, you may be asked to take them after the test.
• Results:
  • The technician won’t provide immediate results, as a doctor or pulmonologist interprets the data.
  • Results are compared to expected values based on your age, sex, height, and ethnicity.
  • Your doctor will discuss findings in a follow-up appointment, explaining if your lung function is normal or indicates a condition.

Risks and Considerations

• PFTs are safe for most people, but minor risks include:
  • Temporary dizziness or shortness of breath.
  • Rare risk of fainting or triggering an asthma attack (staff are trained to manage this).
• Tell your doctor if you’ve had recent heart issues, chest/abdominal surgery, or a collapsed lung, as these may affect your ability to perform the test safely.

Tips for Patients

• Follow all pre-test instructions to ensure accurate results.
• Practice deep breathing beforehand to feel comfortable with the maneuvers.
• Ask the technician to clarify any steps if you’re unsure.
• Bring a list of your medications and any questions for the doctor.

If you have specific concerns (e.g., claustrophobia in the booth or difficulty breathing), let the healthcare team know in advance—they can make accommodations.

For more details, check trusted sources like the American Lung Association (lung.org) or ask your healthcare provider.