TECHNOLOGY USED IN PFT

Pulmonary function tests (PFTs) are non-invasive diagnostic tests that provide measurable feedback about the function of the lungs. By assessing lung volumes, capacities, rates of flow, and gas exchange, PFTs provide information that, can help diagnosis certain lung disorders.

HOW IS PFT TEST PERFORMED

In a spirometry test, a person breathes into mouthpiece that is connected to an instrument called a spirometer. The spirometer records the amount and the rate of air that is breathed in and out over a specified time. Some of the test measurements are obtained by normal, quiet breathing, and other tests require forced inhalation or exhalation after a deep breath.

WHY IS PFT TEST DONE

Pulmonary Function Tests are used for the following reasons:

• Screening for the presence of obstructive and restrictive diseases
• Evaluating the patient prior to surgery - this is especially true of patients who:
  
  
  • are older than 60-65 years of age
  
  
  • are known to have pulmonary disease
  
  
  • are obese (as in pathologically obese)
  
  
  • have a history of smoking, cough or wheezing
  
  
  • will be under anaesthesia for a lengthy period of time
  
  
  • are undergoing an abdominal or a thoracic operation


• Documenting the progression of pulmonary disease - restrictive or obstructive
• Documenting the effectiveness of therapeutic intervention

PFT TEST RISKS

Not applicable