Home » NCLEX » NCLEX-RN » When explaining to the family how the system works, the nurse states that the water-seal bottle of a three-bottle chest drainage system serves which of the following purposes?
A post-lung surgery client is placed on a chest tube drainage system. When explaining to the family how the system works, the nurse states that the water-seal bottle of a three-bottle chest drainage system serves which of the following purposes?
A. Collection bottle for drainage
B. Pressure regulator
C. Preventing accumulation of blood around the heart
D. Preventing air from entering the chest upon inspiration
Correct Answer: D
Explanation/Reference:
Explanation:
(A) There is a separate collection bottle for drainage as part of a chest drainage system. (B) In a three-bottle chest drainage system, one bottle serves only as a pressure regulator. (C) Mediastinal chest tubes prevent accumulation of blood around the heart immediately following heart surgery. (D) The purpose of the water-seal bottle in any chest drainage setup is to allow air out of the chest, but not back in. This negative pressure promotes lung expansion.
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