Which components are part of a three-chamber chest drainage system?

• A. Collection chamber, water-seal chamber, suction-control chamber.
• B. Collection chamber, water-seal chamber, drainage reservoir.
• C. Suction canister, filter, valve.
• D. Drainage bag only.

Answer: (A)

The main idea here is recognizing the three components that make up a standard three-chamber chest drainage system and understanding what each one does. The three essential parts are the collection chamber, the water-seal chamber, and the suction-control chamber.

The collection chamber is where drained fluid from the pleural space collects. It serves as a reservoir and a way to monitor the amount and rate of drainage.

The water-seal chamber provides a one-way valve effect. Its water column creates a seal that prevents air from flowing back into the chest, while still allowing air and fluid to escape from the pleural space as the lung re-expands and drainage occurs.

The suction-control chamber regulates the amount of negative pressure applied to the chest. By using a column of water, it sets and stabilizes the suction level delivered to the pleural space, preventing excessive suction that could harm tissues.

Other options describe components that are not part of this three-chamber setup. A drainage bag alone lacks the necessary water-seal and suction-control features. A setup described as a suction canister, filter, and valve doesn’t specify the three-chamber arrangement. A drainage reservoir alone also doesn’t provide the complete, functioning three-chamber system.