Allergist � specialist in the allergy and asthma fields. Allergists conduct allergy tests, administer sensitivity shots, and prescribe medications for allergies and asthma. While allergists have extensive training in asthma, they are not lung specialists the way pulmonologists are. For that reason, they may be most effective in treating allergen-triggered asthma. Also called an allergist-immunologist.

Gastroenterologist � specialist who examines, diagnoses, and treats disorders of the digestive system. Many asthma patients also have digestive disorders like gastrointestinal reflux disease (GERD) and must see this type of doctor.

Lung Diffusion Capacity Test (DLCO) � a PFT that measures how much oxygen passes from the lungs into the bloodstream. The test requires a patient to empty out the lungs with a deep exhale, inhale completely and then hold breath, and then exhale completely. During the final exhale, a technician measures the gas blown out to determine the amount that passed into the bloodstream during the inhalation.

Pulmonary Function Tests (PFT�S) � range of tests a pulmonologist will conduct to determine asthma severity and treatment. The tests measure the ability of the patient�s lungs to inhale, exhale, and diffuse oxygen into the bloodstream. Lung diffusion capacity and spirometry are PFT's.

Pulmonologist � specialist of lungs and lung disorders, including asthma. Patients with asthma not triggered by allergies usually see a pulmonologist rather than an allergist. These specialists usually receive training in pulmonology and critical care after medical school, making them the most appropriate choice for treating severe asthma.

Pulse oximetry - fingertip sensor that uses a patient�s pulse to measure the level of oxygen in the blood. Doctors may also test pulse ox levels through the earlobe or (with babies) the toe. Oximetry measures the oxygen diffused into the blood from the air breathed in, not the actual rate of breathing. This test is usually administered in a critical setting like a hospital. Doctors use oximetry to help determine if a patient needs oxygen therapy during a very severe flare or as a result of asthma-induced pneumonia.

Spirometry - PFT that indicates how well a patient can exhale into a mouthpiece connected to a spirometer. The spirometer measures the amount and rate of air breathed out, providing a good indication of severity of obstructive pulmonary diseases like asthma.


NOTE: More pulmonary function tests exist than the ones listed above. I have included the most common types, the ones a patient is most likely to encounter in a pulmonologist's office.


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"Smile, breathe and go slowly." -Thich Nhat Hanh



This article is not written by a medical professional, and information on this page should never be substituted for your physician's advice. If you have any questions about your asthma and/or allergies, you should always contact your physician first.