Decreased Lung Compliance? (TMC Practice Question)

The video breaks down a sample TMC practice question about what happens when a patient's lung compliance decreases. Can you guess the correct answer?
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➡️ Question
A 63-year-old female patient is intubated and receiving mechanical ventilation in the pressure-controlled A/C mode. If the patient’s compliance were to decrease, which of the following would you expect to occur?
A. The delivered volume will decrease
B. The peak pressure will increase
C. The inspiratory time will increase
D. The PEEP level will decrease

To get this one correct, you needed to have a basic understanding of lung compliance. You also needed to recognize that the pressure level is preset because the ventilator is in a pressure-controlled mode. If there is a decrease in lung compliance when the ventilator is operating in the pressure control mode, the machine will continue delivering a constant pressure. But, since the lungs don’t expand as much when there is decreased compliance, it reaches the preset pressure limit much faster. This means that there will be a decrease in the delivered tidal volume. Also, in this case, the inspiratory time would decrease, and the PEEP levels would not be affected.

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This content is for educational and informational purposes only. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Please consult with a physician with any questions that you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you watch in this video. We strive for 100% accuracy, but errors may occur, and medications, protocols, and treatment methods may change over time.

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⏰TIMESTAMPS
0:00 - Intro
0:23 - Practice Question
0:51 - Explanation
1:40 - Correct Answer

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