The flow sheet below, for a patient on pressure-controlled ...

[karen]

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

[bobsmith]

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]

Thanks for the timely response, appreciate it

[nathang24]

Excellent