What prevents air from re-entering the pleural space when chest tubes are inserted?
A) The location of the tube insertion
B) The sutures that hold in the tube
C) A closed water-seal drainage system
D) Respiratory inspiration and expiration

Question

Quizplus · Accepted Answer

A closed water-seal drainage system is designed to prevent the re-entry of air into the pleural space. The system creates a one-way valve that allows air and fluid to exit the pleural space, while preventing them from re-entering. The location of the tube insertion and the sutures that hold in the tube do not prevent air from re-entering the pleural space, and respiratory inspiration and expiration can actually create a negative pressure that can draw air into the pleural space.

What Prevents Air from Re-Entering the Pleural Space When Chest