Laboratory Diagnostics: Pulmonary Function Test (PFT)

by Carlo Raj, MD

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    We have been dealing with the laboratory techniques quite a bit. And what we are doing here is making sure that we know as to who is coming in and how to properly assess the information that’s going to come at you. At this point, you should be extremely adept at being able to delineate as to when test is used when and for what reason. So, on that note, let’s begin by looking at pulmonary function tests. Conventionally speaking, pulmonary function tests are used so that you can divide your obstructive versus restrictive lung diseases. With your pulmonary function tests and the type of graphs that we are going to create, you will see that you can get a heck of a lot more information out of it and what is expected of you at this junction in your medical education because of the evolution of the boards themselves. You will enjoy this because it’s building upon things that you already know. Now, the three main categories of the testing include the following. We’ll take a look at spirometry, of course, which is probably the most famous of them all. And with this, it’s the ratio of FEV1 over FEC that we will take a look at. What does it actually mean? It means the amount of air that you are able to get out in one second, forced expiratory volume, one second, over the total amount of air that you physiologically are able to get out which is only limited by, what volume please? Good. Residual volume. You cannot exhale your residual volume completely. Now, if it is obstruction, what does that even mean to you? It means that you cannot properly get your air out. You are obstructed. When that occurs, well, what kind of changes are...

    About the Lecture

    The lecture Laboratory Diagnostics: Pulmonary Function Test (PFT) by Carlo Raj, MD is from the course Respiratory Pathology. It contains the following chapters:

    • Pulmonary Function Testing
    • Spirometry
    • Loop Spirometries
    • Other Spirometry Patterns
    • Diffusion Capacity

    Author of lecture Laboratory Diagnostics: Pulmonary Function Test (PFT)

     Carlo Raj, MD

    Carlo Raj, MD

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