Continuous air bubbling in the water-seal bottle indicates that

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Continuous air bubbling in the water-seal bottle of a chest tube drainage system indicates that air is leaking into the system, most likely from the pleural space. This suggests a potential problem with the lung or surrounding tissues and requires medical attention. Air bubbling is not a normal occurrence in this system. A and B are incorrect as they suggest air movement out of the body, while a chest tube is used to remove excess air or fluid, not to introduce it. D is incorrect as it is not a normal occurrence.

Continuous Air Bubbling in the Water-Seal Bottle Indicates That