One definition requires a total lung capacity which is 80% or less of the expected value.

By calculating the dilution of the tracer gas, the test can also be used to estimate the total lung capacity.

More rarely, forced expiratory flow may be given at intervals defined by how much remains of total lung capacity.

The person then inhales a test gas mixture rapidly and completely, reaching the total lung capacity as nearly as possible.

The values for residual volume and total lung capacity are generally decreased in restrictive lung disease.

Total lung capacity (TLC), which is the total amount of air your lungs can hold.

Total lung capacity (TLC).

These patients should be followed with pulmonary function testing, including the diffusing capacity of carbon monoxide and ratio of residual volume to total lung capacity.

The compression also causes a decreased total lung capacity (TLC) by 5% and decreased expiratory reserve volume.

DPT has a significant impact on pulmonary function, causing a decrease in forced vital capacity, reducing total lung capacity and diffusing capacity.

This manifests as a reduction in lung volumes, particularly the vital capacity (VC) and total lung capacity (TLC).

The average total lung capacity of an adult human male is about 6 litres of air, but only a small amount of this capacity is used during normal breathing.

The maximum diving depth of the free diver is mainly determined by the ratio of the residual volume (RV) to the total lung capacity (TLC).

Within the year before the interview 27 patients had had pulmonary arterial pressures measured directly and 23 had had total lung capacity (helium dilution) and gas transfer measured.

A dose of 12 Gy to 14 Gy reduced total lung capacity and vital capacity to about 70% of predicted values, and even lower if the patient had undergone thoracotomy.

Pulmonary plethysmographs are commonly used to measure the functional residual capacity (FRC) of the lungs-the volume in the lungs when the muscles of respiration are relaxed-and total lung capacity.

The residual volume, the volume of air left in the lungs following full expiration, is often increased in COPD, as is the total lung capacity, while the vital capacity remains relatively normal.

The increased total lung capacity (hyperinflation) can result in the clinical feature of a "barrel chest" - a chest with a large front-to-back diameter that occurs in some individuals with COPD.

The hamster model has probably been chosen for these studies in large part because of the impressive increases in lung volumes that can be created in hamsters, with total lung capacity sometimes reaching 200% of control values.

Croft is credited with inventing "air packing" (also known as "lung packing" or "glossopharyngeal inhalation"), a method used to overfill the lungs, increasing the volume of air in the lungs above the total lung capacity prior to breath-holding.

The guidelines indicating transplantation include progression despite medical treatment, forced expiratory volume in 1 second (FEV1)/forced vital capacity ratio of less than 50%, total lung capacity of greater than 130%, and FEV1 of less than 30%.

Results Lung volume We determined H 2 O displacement lung volumes at total lung capacity (25 cmH 2 O airway pressure) as the simplest measure to document the hyperexpansion characteristic of emphysema in the elastase-treated animals.

As SCI patients suffer from reduced total lung capacity and tidal volume it is pertinent that physical therapists teach SCI patients accessory breathing techniques (e.g. apical breathing, glossopharyngeal breathing, etc.) that typically are not taught to healthy individuals.