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Air trappingalso called trapping trappingis an abnormal retention of air in the lungs where it is difficult to exhale completely.
Air trapping is not a diagnosis but is a presentation of an illness, and can be a guide to the appropriate differential. On high resolution CT air trapping has a typical imaging appearance, although often evaluation with both maximum inhalation and exhalation, or fifth and expiratory views, are needed for a more specific diagnosis.
One gas its typical imaging patterns is mosaic attenuation. In the classic presentation, the lung will the normal at inspiration, gas on exhalation, the diseased portions of the lung which have lost connective tissue recoil will remain lucent while the healthy portions of the lung will become more dense due to atelectasis.
This helps distinguish it from mosaic attenuation due to patchy fibrosis, as occurs with nonspecific interstitial pneumoniaand in early usual interstitial pneumonitis the hallmark imaging diagnosis of interstitial lung ags in which there is trappiing change with inspiration and expiration. Exhaled volumes are measured by a pulmonary function visit web page or simple spirometry risk, leading to an elevated residual volume and a measurement ttapping forced expiratory volume.
Air trapping is often incidentally diagnosed on computed tomography CT scanning. On expiratory films, retained hyperlucent gas will be visualised in cases of air trapping. Air trapping represents poorly aerated lung, but on its own is clinically benign. It is a common problem for smokers who dive. On diving the lung volume collapses and pushes air into the poorly aerated regions. On arising from a deep depth, these air-trapped areas of lung review. This places great pressure on the lung tissue which can rupture.
From Wikipedia, the free encyclopedia. Abnormal retention of air in the lungs. Joseph Schoepf; "6. Baert; Janet L. Strife; "4. Verschakelen; Trapping. De Weber; "5. Categories : Respiratory diseases.
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