Lung Function Testing

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Lung Function Testing

Allergies can affect the functionality of your respiratory system in many ways. If you experience coughing, wheezing, shortness of breath, or other breathing difficulties, they may be relieved by diagnosing and treating your allergies. Our offices at Advanced Allergy & Asthma Associates/Food Allergy Center of Illinois are equipped with the latest, most reliable technology for accurate diagnosis and treatment planning.

Our computerized lung function test, also called spirometry, can help us determine the nature and severity of your respiratory problems. The process is simple and comfortable. You only need to breathe into a sterile mouthpiece, which sends data to the spirometer (analytical machine). It accurately measures a number of functionality indicators including:

What is Spirometry?

With a spirometry test, Dr. Noga Askenazi can test how well your lungs are working. Watch to find out more about the test and what you should expect!
Video Transcript


Spirometry is a test of how well your lungs are working, by measuring how fast and how much air you can breathe in and out. Normally, as you breathe in, or inhale, air moves freely through your trachea, or windpipe, then through large tubes called bronchi, smaller tubes called bronchioles, and finally into tiny sacs called alveoli. Small blood vessels called capillaries surround your alveoli. Oxygen from the air you breathe passes into your capillaries. Then, carbon dioxide from your body passes out of your capillaries into your alveoli. Then, you get rid of the carbon dioxide when you breathe out or exhale. Diseases, such as COPD and asthma, restrict your bronchioles, reducing the amount of air going into your lungs. COPD also damages your alveoli, which may reduce the amount of oxygen in your blood. These diseases can make it hard for you to breathe. Your doctor may recommend a spirometry test, to identify a disease in your lungs or to check the severity of your existing lung disease. During the test, your caregiver will use a device called a spirometer. A spirometer is a machine that measures exhaled air. Before you take a spirometry test, you will sit in a comfortable chair with your feet flat on the floor. If you have dentures, you may be asked to remove them. For best results, you’ll be advised to follow your caregiver’s instructions exactly. To start, you will raise your head and chin so you can breathe easily. Next, you may place a clip on your nose to prevent air from coming out of your nostrils. Then, you will take a deep breath, filling your lungs completely with air and hold it. You will place the spirometer’s mouth piece between your teeth and tightly seal your lips around it. Finally, you will blast the air out of your lungs as hard and as fast as you can. Your caregiver will tell you when to stop. Adults typically blow for at least 6 seconds. You will need to perform the spirometry test correctly three times to get accurate results. Your doctor will discuss the results with you and let you know if you have any breathing problems.

  • FVC (forced vital capacity) is the volume of air you can exhale forcefully after deeply inhaling.
  • FEV (forced expiratory volume) is the volume of air that you can forcefully exhale in a single breath.
  • Forced expiratory flow is a measurement of airflow taken while exhaling.
  • PEF (peak expiratory flow) is how fast you can exhale a deep breath.
  • MVV (maximum voluntary ventilation) is a measurement of the maximum volume of air you are capable of inhaling and exhaling within a 60-second period.
  • SVC (slow vital capacity) is the volume of air that you can exhale slowly after inhaling deeply.
  • TLC (total lung capacity) is the maximum volume of air you are capable of inhaling.
  • FRC (functional residual capacity) is the volume of air remaining in your lungs following normal exhalation.
  • RV (residual volume) is the volume of air that remains in your lungs after exhaling as much as possible.
  • ERV (expiratory reserve volume) is the difference between the volume of air remaining in your lungs after exhaling forcefully, and that remaining after exhaling normally.

This data enables us to evaluate your lung functioning and breathing abilities in detail, so that we can provide the appropriate treatment if needed. The respiratory disorders that can be detected with this test include:

  • Emphysema
  • Chronic cough
  • Bronchitis
  • Asthma
  • More

If you have been experiencing breathing difficulties that may be allergy related, let the trained professionals at Advanced Allergy & Asthma Associates/Food Allergy Center of Illinois help! We have three convenient locations – Elgin and Crystal Lake – for easy access throughout the region. Call (847) 888-8802 and schedule your appointment today.

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Advanced Allergy & Asthma Associates

Dr. Noga Askenazi | Dr. Eugenia Hahn | Meredith Cirrincione | Tonilyn Hatch

Dr. Noga Askenazi is a nationally recognized asthma and allergy specialist who is board certified in pediatric and adult allergy. Her areas of special interest are innovative treatment of rashes, sinusitis, food allergies, asthma and immune disorders. She was past President of the ISAAI (Illinois Society of Allergy, Asthma, & Immunology), works on state and national committees for advancement of the allergy field and is a consultant for Advocate, AMITA, Northwestern amongst other health care systems. Her joy is helping patients reach their goals after together determining best treatments. Her staff and patients are a chosen family, and she invests in their happiness. She enjoys gardening, biking and cooking to good music.

Dr. Eugenia Hahn is a highly recognized board certified allergist and immunologist who treats patients of all ages. Her areas of special interest are food allergy, eczema, and asthma. She is president of the Illinois Society of Allergy & Asthma, a National Committee leader of the American Academy of Allergy, Asthma, and Immunology, a member of the American College of Allergy, Asthma, and Immunology working on new treatment options for patients. She is a consultant for Advocate, Northwestern, AMITA, Northwest Community healthcare systems amongst many others. Her patients mean everything to her as she takes pride in finding the why behind the problem. She enjoys reading and spending time with her family.

Meredith Cirrincione is a board certified Physician Assistant and specializes in treating allergies, with a focus on asthma, rashes, environmental allergies, chemical and food allergies. She holds a Masters in Physician Assistant Studies from The Chicago Medical School - Rosalind Franklin University of Health Sciences. She is a Fellow member of the American Academy of Physician Assistants, the Illinois Academy of Physician Assistants, and the Association of PAs in Allergy, Asthma and Immunology. She likes to approach things holistically. She is a strong patient advocate and adored by her patients. She enjoys singing, reading, cooking, and the great outdoors.

Tonilyn Hatch is a Board-certified Physician Assistant who has been working as a PA in Allergy, Asthma, and Immunology for the past 10 years. She has a Masters in Physician Assistant Studies from Midwestern University and a Bachelor of Science in Psychology from Brigham Young University. Also, she is a Member of the American Academy of Physician Assistants (AAPA) and AAPA: Association of PAs in Allergy, Asthma, and Immunology. As a lifelong allergy and asthma patient herself, she understands the effects these health issues can have on daily life. She prides herself in taking time to educate her patients on their medical conditions and then developing personalized treatment plans for each of her patients. In her free time, she enjoys traveling, relaxing at home, spending time with her nephews in Arizona and niece in New Mexico, and attending sporting events.

Our Happy Patients

Many Patients are satisfied and even ecstatic with the abilities of Dr. Askenazi and
the team at Advance Allergy & Asthma Associates.