Key spirometry measurements include:

  • Forced vital capacity (FVC). This is the largest amount of air that you can forcefully exhale after breathing in as deeply as you can. A lower than normal FVC reading indicates restricted breathing.
  • Forced expiratory volume (FEV-1). This is how much air you can force from your lungs in one second. It's a good way to measure the severity of your breathing problems. Lower FEV-1 readings indicate more significant obstruction.
Jul. 09, 2011