| A | B |
|---|
| Total Lung Capacity | amount of air contained in the lungs at the end of a maximal expiration |
| FEF25-75% | describes the amount of air expelled from the lungs during the middle half of the FVC test |
| Post bronchodilator testing | performed to test for reactive airway disease after an abnormal PFT |
| Reduced flow through airways | inflammation, swelling, compression and narrowing |
| RV/TLC ratio | the percentage of TLC occupied by the RV |
| Vital Capacity | combination of the inspiratory capacity and the expiratory capacity |
| spirometer | measure changes in volume, flow and electronic signal outputs from a pneumotach |
| Wright's Respirometer | works by rotation of a thin vane with one-directional gas flow |
| Haloscale Respirometer | operates between 3 and 300 liters/min and is not recommended for FVCs |
| Extrinsic Restrictive lung disorders | scoliosis, kyphosis, obesity and pain |
| Inspiratory Capacity | normally 75% of VC |
| Slow Vital Capacity | eliminates the strong bronchoconstriction that can happen with an FVC |
| SVC | may demonstrate a much larger VC than FVC |
| Inhaled short acting bronchodilators | should be held for 4-6 hrs prior to obtaining a baseline PFT |
| FVC and FEV1 | largest values should be reported even if not from the same curve |
| PEFR | Peak expiratory flow rate |
| Reproducibility | two largest FEV1 and FVCs from acceptability maneuvers do not vary more than 0.200L |
| pulmonary function testing | assesses flow, volume and compliance |
| FEV1 | volume forcibly exhaled in first second of FVC |
| FEF | represents how much air can be expired from the lungs |
| Predicted values variables | gender, race, age, body height and size |
| Routine Spirometry | measures air flow and volume |
| Neuromuscular restrictive lung disorders | paralysis of the diaphragm, muscular dystrophy, myasthenia gravis, ALS |
| FVC | amount of air maximally and forcibly expelled from lungs after max inhalation |
| Body plethysmography | measures gas volume indirectly, most accurate for measuring RV, and monitors pressure and volume changes |
| volume verification | uses a calibration syringe |
| NIF | operates by transmittal of pressure to a sealed diaphragm and pivot assembly |
| MVV | is a reflection of muscle strength, a/w resistance and compliance |
| disposable circuitry | minimizes nosocomial infections |
