Answer :
Final answer:
A chest tube effectively functions as a closed drainage system by applying the principles of gravity, negative pressure, and suction. These elements work together to allow fluid or air to be drained from the pleural space. The most suitable answer to the question is the option involving all three principles.
Explanation:
Understanding Chest Tubes in Medical Practice
A chest tube is an important medical device used for draining fluid or air from the pleural space in patients with certain conditions, such as pneumothorax or pleural effusion. The function of a chest tube operates on several principles to facilitate effective drainage.
Principles of Operation
The correct answer to the question asks about the principles that enable a chest tube to work as a closed drainage system. The options considered include:
- Gravity and suction
- Gravity, negative pressure and suction
- Gravity, positive pressure and suction
- Suction only
The most accurate option is Gravity, negative pressure and suction. Chest tubes primarily utilize gravity to help drain fluids, but they also rely on the creation of negative pressure in the pleural space to effectively remove air or fluid. Additionally, suction can be applied to enhance this process when necessary.
For example, in a case of a tension pneumothorax, a chest tube can be inserted to relieve pressure, using both gravity and the negative pressure created by the suction system to facilitate the removal of trapped air.
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