Skip to content

Lung Disease & Respiratory Health Center

Font Size

Tests for Lung Infections - Topic Overview

Other tests for lung infections, such as pneumonia and acute bronchitis, may include:

  • Blood tests or cultures. Blood tests may help tell whether antibodies to a specific organism that can cause pneumonia are present or whether specific viruses, such as influenza (flu) or respiratory syncytial virus (RSV), are present. A test for blood urea nitrogen (BUN) can help tell how serious an infection is. Doctors can use blood cultures to test for bacteria in your bloodstream.
  • Oximetry. An oximeter can estimate the amount of oxygen in your blood. A sensor in a cuff or clip is placed on the end of your finger. This sensor measures how much oxygen is in your blood. The oximeter machine shows the result.
  • Arterial blood gases. An arterial blood gas test can measure the levels of oxygen in a sample of blood drawn from your artery. Doctors use this test to find out whether enough oxygen is getting into your bloodstream from your lungs.
  • Bronchoscopy. Bronchoscopy is a visual exam of the tubes leading to your lungs. This test is usually done by a pulmonologist (lung specialist). He or she inserts a small, lighted device through your nose or mouth into the tubes leading to your lungs. During the procedure, the doctor can obtain samples of tissue, fluid, or mucus.
  • Transtracheal mucus cultures (rarely done). Transtracheal sputum cultures are tests performed on a mucus sample obtained directly from your windpipe (trachea).
  • Lung biopsy. A lung biopsy is a test done on a very small piece of lung tissue to look for conditions such as lung cancer or fibrous tissue in the lungs (pulmonary fibrosis). Your doctor obtains lung tissue by inserting a needle into your chest between two ribs or by using bronchoscopy.
  • Thoracentesis. Thoracentesis involves puncturing the chest wall to obtain fluid from the space around the lungs. Fluid obtained during the test can be checked for signs of infection or cancer.
  • Computed tomography (CT) scan. A CT scan uses X-rays to produce detailed pictures of structures inside your body. It may be used in people who are not responding to their treatment.

    This information is produced and provided by the National Cancer Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National Cancer Institute via the Internet web site at http:// cancer .gov or call 1-800-4-CANCER.

    WebMD Medical Reference from Healthwise

    Last Updated: March 06, 2013
    This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
    1
    Next Article:

    Tests for Lung Infections Topics

    Today on WebMD

    man coughing
    You may not even know you have it.
    blood clot
    Signs of this potentially fatal complication.
     
    man coughing
    When a cold becomes bronchitis.
    human lungs
    Causes behind painful breathing, fluid buildup.
     

    chest x-ray
    Slideshow
    Bronchitis Overview
    SLIDESHOW
     
    Copd Myth Fact Quiz
    QUIZ
    Energy Boosting Foods
    SLIDESHOW
     

    Pollen counts, treatment tips, and more.

    It's nothing to sneeze at.

    Loading ...

    Sending your email...

    This feature is temporarily unavailable. Please try again later.

    Thanks!

    Now check your email account on your mobile phone to download your new app.

    lungs
    Article
    smokestacks
    Article
     
    woman coughing
    Article
    Lung xray and caduceus
    Article
     

    WebMD Special Sections