Diagnostic Services

The O2 Pulmonary & Sleep Group provides a variety of diagnostic services for patients with pulmonary or sleep disorders. These services help doctors diagnose or confirm diagnosis for patients who have trouble breathing or sleeping.

Pulmonary Diagnostic Services

The O2 Pulmonary & Sleep Group performs pulmonary diagnostic services that help diagnose lung problems. These services include:


A bronchoscopy is a visual examination of the air passages leading into your lungs. Our lung doctors use a bronchoscope, which is a long thin tube equipped with a camera at the tip, to perform the exam. A bronchoscopy helps doctors diagnose lung disease, cancer or infection. There are also more specific procedures like endobronchial ultrasounds (EBUS) that we perform as the latest technology in lung problem diagnosis.


In thoracentesis, our lung doctors remove fluid from the space between the lungs and the chest wall, known as the pleural space. We then send this fluid sample to the laboratory for testing. A thoracentesis helps doctors diagnose a variety of conditions, including pleural effusion, which is excessive fluid in the pleural space.

A thoracentesis can also help diagnose other lung conditions, such as:

  • Congestive heart failure (CHF), which is the most common cause of pleural effusion
  • Infections
  • Cancer
  • Blood clots in the lung
  • Emphysema


Pulmonary Function Test

Pulmonary function tests (PFTs) help doctors understand how well your lungs function. PFTs are non-invasive tests that measure how well your lungs take in and release air, and how well your lungs move oxygen from your environment into your lungs. In addition to using PFTs to assess the effects of medication and measure progress in the treatment of lung disease, doctors perform PFTs to find the cause of shortness of breath and to diagnose lung disease.


Sleep Diagnostic Services

The O2 Pulmonary & Sleep Group provides sleep diagnostic services to help patients discover the source of their sleep disorders. A sleep study, also known as a polysomnogram, is a test that electronically transmits and records specific physical activities while you sleep.

A sleep study can help determine if your sleep problem is due to insomnia, restless leg syndrome, or conditions that cause you to stop breathing while you sleep, known as obstructive sleep apnea and central sleep apnea.

Contact O2 Pulmonary & Sleep Group

To learn more about the diagnostic services offered by O2 Pulmonary & Sleep Group, call our Plano clinic at 214-919-0757 or contact us online.