18th Judicial Circuit Court-Message from the Chief Judge. The judges and support staff of the Circuit Court of the Eighteenth Judicial Circuit of the State of Illinois are committed to serving the public by providing a fair and efficient system of justice that fosters the public trust and confidence.
Everyone at risk for COPD who has cough, sputum production, or shortness of breath, should be tested for the disease. The test for COPD is called spirometry. Spirometry can detect COPD before symptoms become severe. It is a simple, non-invasive breathing test that measures the amount of air a person can blow out of the lungs (volume) and how fast he or she can blow it out (flow).
Different spirometry tests exist. The main spirometry tests are: 1  FVC (Forced Vital Capacity): the single most important test in spirometry. 2  CV (Vital Capacity or Slow Vital Capacity): this test used to be performed to get VC and to be able to calculate the FEV1/VC ratio (FEV1% or Tiffeneau index). CV (Vital Capacity or Slow Vital Capacity): this test used to be performed to get VC and to be able to calculate the FEV1/VC ratio (FEV1% or Tiffeneau index). 2  Now this old parameter has been replaced with a new Tiffeneau index (FEV1/FVC ratio). 3  MVV (Maximum Voluntary Ventilation): this test is now rarely performed.