A client's chest tube is connected to a drainage system with a water seal. The nurse notes that the fluid in the water-seal column is fluctuating with each breath that the client takes. The...

A client's chest tube is connected to a drainage system with a water seal. The nurse notes that the fluid in the water-seal column is fluctuating with each breath that the client takes. The fluctuation means that:

1. There is an obstruction in the chest tube.

2. The client is developing subcutaneous emphysema.

3. The chest tube system is functioning properly.

4. There is a leak in the chest tube system.