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Author Question: The flow sheet below, for a patient on pressure-controlled continuous mandatory ventilation ... (Read 167 times)

karen

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The flow sheet below, for a patient on pressure-controlled continuous mandatory ventilation (PC-CMV), demonstrates which of the following?
 
  Time PIP (cm H2O) PEEP (cm H2O) Exhaled VT (mL)
  0800 28 8 575
  1000 28 8 558
  1200 28 8 500
 
  a. Lung compliance is increasing.
  b. Dynamic compliance is decreasing.
  c. Airway resistance is decreasing.
  d. There is a leak in the ventilator circuit.

Question 2

How can the amount of cuff volume/pressure lost in the connecting tube be minimized during cuff measurement using a three-way stopcock, a manometer, and a syringe?
 
  a. Using a four-way stopcock
  b. Overinflating the cuff prior to measure-ment
  c. Simultaneously inflating the cuff and ma-nometer
  d. Pressurizing the manometer to 25 mm Hg prior to use



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bobsmith

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Answer to Question 1

ANS: B
During pressure-controlled continuous mandatory ventilation (PC-CMV), a decrease in volume delivered is characteristic in a decreased dynamic compliance. If lung compliance increased or airway resistance decreased, the exhaled tidal volume would have increased. A leak in the venti-lator circuit would also drop the peak inspiratory pressure (PIP).

Answer to Question 2

ANS: D
Pressurizing the manometer to 25 mm Hg before measuring the cuff pressure will ensure that the pressure/volume in the cuff will not be lost into the connecting tubing. Once pressurized, the three-way stopcock, syringe, and manometer system can be inserted into the pilot. With all three ways open, the cuff can be inflated or deflated while the pressure is being measured.




karen

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Reply 2 on: Jul 16, 2018
Thanks for the timely response, appreciate it


nathang24

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Reply 3 on: Yesterday
Excellent

 

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