Vital Lung Capacity Test Lung Volume

Lung Test, Pulmonary Function Tests

Lung function tests, respiratory system diseases, especially niteliğindedir routine investigations. The main indications: evaluation of disease diagnosis and prognosis are important contributions. And to decide whether surgery is required.
Lung function tests can be examined in 3 groups:

1. Lung volumes
2. Respiratory mechanics
3. Gas exchange (ventilation, diffusion, perfusion, and arterial blood gases)

1. Lung volumes, lung volume

Measured statically. Main:

Vital Capacity (VC), maximal inspiration after a maximal forced expiratory volume in air. Middle-aged and mid-size a normal person's vital capacity is approximately 4500 ml.

Residual Volume (RV), maximal at the end of an expiratory volume of air remaining in the lungs. Normally, about 1000 ml.dır. Increases with age. Chronic obstructive pulmonary diseases (emphysema, asthma and chronic bronchitis), and it increases with increasing residual volume and total lung capacity ratio (RV / TAC) increases. RV / TAK 's growth is an important finding for obstructive lung diseases.

Total lung capacity (TAC), maximal inspiratory gas present in the lung at the end. TAC = VC + RV volümüdür. About 5-8 liters.

Tidal volume (TV) in the inspiratory or expiratory volume during respiration. 500-800 ml.dir rest.

TAC = total lung capacity, TV = Tidal volume, HR = inspiratory capacity, FRC = functional residual capacity, expiratory reserve EY =, VC = vital capacity, RV = residual volume.

Vital capacity is one of the most commonly used lung function tests. Vital capacity decreased major diseases:
Parenkinıa Lung Diseases: Common fibrosis, tuberculosis, tumors, atelectasis, surgery.

Thoracic restriction of movements: Obesity, rib fractures, kifos-Spanish mackerel, poliomyelitis, myasthenia gravis.

Restriction of lung expansion capacity of pleural effusion, pneumonia-a pneumothorax, diaphragmatic hernia, fibrothorax, heart growth.

Obstruction of the airways: asthma, emphysema, bronchial stenosis.

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