Intrapleural pressure at end inspiration during passive breathing is which value?

Prepare for the Mechanical Vent Test with multiple choice questions, flashcards, and detailed explanations. Enhance your knowledge and ace the exam!

Multiple Choice

Intrapleural pressure at end inspiration during passive breathing is which value?

Explanation:
Intrapleural pressure is normally negative and becomes more negative during inspiration to help expand the lungs. At the end of a quiet, passive inspiration, this pressure reaches its most negative point in the cycle. In a healthy person, it is about -7 to -8 cm H2O. Values around zero or positive would not support lung expansion, and the end of expiration is typically around -5 cm H2O. So the correct concept is a negative intrapleural pressure at the end of inspiration, approximately -7 to -8 cm H2O; none of the provided options exactly match this magnitude.

Intrapleural pressure is normally negative and becomes more negative during inspiration to help expand the lungs. At the end of a quiet, passive inspiration, this pressure reaches its most negative point in the cycle. In a healthy person, it is about -7 to -8 cm H2O. Values around zero or positive would not support lung expansion, and the end of expiration is typically around -5 cm H2O. So the correct concept is a negative intrapleural pressure at the end of inspiration, approximately -7 to -8 cm H2O; none of the provided options exactly match this magnitude.

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