Final answer:
If a chest tube comes out, a sterile dressing should be applied, and firm pressure maintained over the site. Immediate medical assistance is necessary to prevent complications such as a pneumothorax. Healthcare providers may apply an occlusive dressing while preparing for further intervention.
Step-by-step explanation:
If a chest tube comes out, it is considered a medical emergency because it maintains negative pressure in the pleural space, which is critical for proper lung function. Should a chest tube be dislodged, immediate steps should be taken to prevent a pneumothorax (collapsed lung) due to air entering the chest cavity. First, one should cover the wound with a sterile dressing and apply firm pressure to prevent further air from entering. Emergency medical assistance must be sought immediately, and the patient should be kept calm until help arrives. In a healthcare setting, a doctor or nurse would likely apply a sterile, occlusive dressing taped on three sides to create a one-way valve while preparing for the reinsertion of the chest tube or other intervention.