Lung & Sleep Specialists of North Texas

Frequently Asked Questions

Q: What is a PFT?

A: This test measures how well your lungs work. This includes how well you’re able to breathe and how effective your lungs are able to bring oxygen to the rest of your body. The test usually lasts at least 30-45 minutes.

Q; What other tests does your office offer?

A: The doctor might order a 6 minute exertion test, a SHAPE test, allergy skin testing, OPO, or sleep testing.

Q: What is a SHAPE test?

A: A SHAPE test stands for a Simple Cardiopulmonary Stress Test. This test provides an assessment of exercise tolerance and exercise response to determine whether a patient’s exercise intolerance is related to pulmonary disease, cardiac disease, or due to lack of conditioning. Please wear comfortable clothing and shoes, preferable designed for walking. This is for your safety.

Q: What is a 6 minute exertion test?

A: This test measures the distance you can walk quickly on a flat, hard surface in 6 minutes and reflects your ability to perform daily physical activities. If you do not feel you can walk, alert the clinical staff upon arrival, as we can modify the test to still proceed with the test. IF your oxygen level decreases to 88%, we will stop testing and apply supplemental oxygen. The provider will order continuous oxygen therapy if criteria is met. Please wear comfortable clothing and shoes, preferably for walking. This is for your safety. If you normally use a walking aid such as a cane or walker, please bring with you to your appointment.

Q: What is an OPO?

A: An overnight home oximetry is a test to monitor and record the level of oxygen in your blood as you sleep through the night at home. With this test, an oxygen sensor is clipped to your finger and connected to a machine called an oximeter. The oximeter measures and and records your heart rate and the level of oxygen carried in your blood.

Q: What does allergy skin testing do?

A: This testing checks for immediate allergic reactions to as many as 40 different substances at once, without needles. It is usually done to identify allergies to pollen, mold, pet dander and must mites common in this area.