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Total lung capacity - Revision history
2026-04-26T22:37:35Z
Revision history for this page on the wiki
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Prab at 13:19, 18 March 2025
2025-03-18T13:19:47Z
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Prab
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Prab: CSV import
2025-03-18T01:31:30Z
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Prab: CSV import
2025-02-11T06:00:08Z
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Prab: CSV import
2025-02-08T21:22:26Z
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Prab
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Prab: CSV import
2024-02-25T05:01:43Z
<p>CSV import</p>
<p><b>New page</b></p><div>'''Total lung capacity''' ('''TLC''') refers to the maximum volume of air that the [[lungs]] can hold after a maximum [[inhalation]]. It is approximately 6 liters for adult human males and 4.2 liters for adult human females. TLC is the sum of [[vital capacity]] and [[residual volume]]. It is an important measure in [[pulmonology]] and can be affected by diseases such as [[emphysema]] and [[pulmonary fibrosis]].<br />
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==Measurement==<br />
TLC can be measured using a number of techniques including [[spirometry]], [[body plethysmography]], and [[gas dilution]] techniques. Spirometry is the most common method, but it cannot measure the residual volume, so it cannot provide a direct measurement of TLC. Body plethysmography and gas dilution techniques can measure residual volume and therefore provide a direct measurement of TLC.<br />
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==Factors affecting TLC==<br />
TLC can be affected by a number of factors including age, sex, body size, and disease. Age and sex are the most significant factors, with TLC generally being higher in males and decreasing with age. Diseases such as emphysema and pulmonary fibrosis can significantly reduce TLC.<br />
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==Clinical significance==<br />
TLC is an important measure in the diagnosis and monitoring of lung diseases. A reduced TLC can indicate [[restrictive lung disease]], while an increased TLC can indicate [[obstructive lung disease]]. TLC is also used in the calculation of other lung volumes and capacities.<br />
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==See also==<br />
* [[Lung volumes]]<br />
* [[Spirometry]]<br />
* [[Pulmonology]]<br />
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[[Category:Respiratory physiology]]<br />
[[Category:Pulmonology]]<br />
[[Category:Medical terminology]]<br />
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