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Insights into Imaging
Fig. 24 | Insights into Imaging

Fig. 24

From: Demystifying the persistent pneumothorax: role of imaging

Fig. 24

Water seal drainage system. Bubbling within the air leak chamber (*) should cease within 24 h. If an air leak has already sealed, bubbling will be seen only with cough or Valsalva. Continuous bubbling indicates a large air leak. A cardinal sign of a blocked thoracic tube is failure of the fluid column within the tube to fluctuate with coughing or respiration

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