Page 270 - Clinical Application of Mechanical Ventilation

236 Chapter 8

3. Impending ventilatory failure may be evaluated by trending a patient’s:
A. respiratory parameters and mechanics.
B. arterial PO .
2
C. vital signs.
D. hemodynamic parameters.

4. Among other criteria of assessment, impending ventilatory failure may be present when the patient’s
minute ventilation is _______ 10 L/min and maximum inspiratory pressure is less than _______.
A. more than, 20 cm H O
2
B. more than,220 cm H O
2
C. less than, 20 cm H O
2
D. less than,220 cm H O
2
5. The primary purposes of prophylactic mechanical ventilation include all of the following except:
A. to minimize the risk of pulmonary complications.
B. to reduce prolonged hypoxia of major body organs.
C. to reduce the work of the cardiopulmonary system.
D. to monitor the arterial blood gases and vital signs.

6. A physician asks the therapist to set up a ventilator using volume-controlled made for a 35-year-old post-
operative patient who weighs 132 lb (60 kg). The therapist should use an initial tidal volume of _______
and frequency of _______.

A. 400 mL, 12/min
B. 400 mL, 20/min
C. 600 mL, 20/min
D. 600 mL, 12/min

7. A therapist is using the standard procedure to measure the compressible volume of a new ventilator cir-
cuit. The observed expired volume (mL) and peak inspiratory pressure (cm H O) are 150 mL and 50 cm
2
H O, respectively. The circuit compressible evaluated is therefore:
2
A. 2 mL/cm H O.
2
B. 4 mL/cm H O.
2
C. 5 mL/cm H O.
2
D. 3 mL/cm H O.
2
8. With a circuit compressible volume of 3 mL/cm H O, what would be the delivered tidal volume with an
2
expired tidal volume of 550 mL and a peak inspiratory pressure of 30 cm H O?
2
A. 500 mL
B. 460 mL
C. 620 mL
D. 540 mL

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