Total lung capacity (TLC)

The total amount of lungs is the total amount of gas contained in the lungs after deep inhalation, ie total lung volume = tidal volume + supplemental inspiratory volume + supplemental expiratory volume + residual gas volume. Normal lung output does not necessarily mean normal lung function, and the increase or decrease in lung capacity and residual capacity can complement each other. Basic Information Specialist classification: Respiratory examination classification: pulmonary function test Applicable gender: whether men and women apply fasting: not fasting Tips: Two days before the examination, all the drugs for bronchiectasis should be stopped, such as Shuchuanling, Bangfu, Meipuqing, aminophylline, Shufumei Lehui, Asami, Aichuan, etc. Otherwise it will affect the inspection result. Normal value Male 5.09±0.87L; female 4.00±0.83L. Clinical significance Abnormal results: Increase: seen in emphysema, old lungs. Reduction: Various conditions that lead to restrictive ventilatory disorders result in a significant reduction in total lung volume. Note that normal lung volume does not necessarily mean that the lung function is normal, because the increase or decrease in lung capacity and residual capacity can complement each other. Need to check the crowd: patients with purpura, abnormal breathing symptoms. High results may be diseases: emphysema, obstructive emphysema precautions Pre-inspection requirements: Two days before the examination, all the drugs for bronchodilation should be stopped, such as Shuchuanling, Bangfu, Meipuqing, aminophylline, Shufumei Lehui, Asami, Aichuan, etc., otherwise it will affect test result. Note when checking: Inform the doctor about the history of the drug and the medical history. Not suitable for people: Asthmatic patients need to consult a doctor. Inspection process Using the lung function tester, it can be measured that the total amount of lungs is the total amount of gas contained in the lungs after deep inhalation, which is equal to the lung capacity plus residual gas volume. Not suitable for the crowd Not suitable for people: Patients with cardiac insufficiency should consult their doctor before making this test. Adverse reactions and risks Generally no complications and harm.