Which of the following interferes with ventilation in the presence of a flail segment?
A) The ability to generate positive intrathoracic pressure is impaired.
B) Intrathoracic pressure increases on the affected side.
C) Intrathoracic pressure decreases on the affected side.
D) The ability to generate negative intrathoracic pressure is impaired.

Question

Quizplus · Accepted Answer

A flail segment refers to a portion of the chest wall that is not attached to the rib cage and moves independently during breathing. This can lead to impaired ability to generate negative intrathoracic pressure during inspiration, which is essential for normal ventilation. Choices A and B are not accurate as positive intrathoracic pressure does not aid in ventilation, and intrathoracic pressure actually decreases on the affected side during inspiration due to the flail segment. Choice C is also incorrect as intrathoracic pressure does not increase on the affected side.

Which of the Following Interferes with Ventilation in the Presence