Document ID: chunk:federal_register_of_legislation:F2016L01332:reg:25:p4
Version: federal_register_of_legislation:F2016L01332
Segment Type: reg
Provision Reference: reg 25 (pt 4/4)
Character Range: 48325–49228

disease is present.) Determine the impairment rating based on measurements of lung function.

    FEVl, FVC, and MEF25-75 are the usual physiological measurements of lung function. Determinations of FEVl, FVC, and MEF25-75 should be conducted by an experienced operator without specific administration of a bronchodilator.  The best set of results should be selected, that is, the set of results which indicates the greatest degree of health and, consequently, the lowest degree of impairment.

    If both pre-bronchodilator and post-bronchodilator results are available the pre- bronchodilator results are to be applied in determining the impairment rating based on measurements of lung function.

    To determine the impairment rating based on measurements of lung function, follow the substeps below.

    Substep    Obtain the measured FEVl, FVC, and MEF25-75 from the data.
      4A

    Substep