The following data are collected on a 75-kg (165-lb) patient receiving volume-controlled ven-
tilation:
Mode
Assist-control
Ventilator rate
15/min
Tidal volume
600 mL
FIO2
0.70
PEEP
10 cm H2O
ABGs
pH
7.36
PaCO2
41 mm Hg
PaO2
139 mm Hg
HCO3
25 mEq/L
BE
+2
Which of the following ventilator changes should the respiratory therapist recommend?
1
, A. Decrease the PEEP to 8 cm H2O.
B. Decrease the FIO2 to 0.60.
C. Increase the rate to 20 breaths/min.
D. Decrease the tidal volume to 550 mL. - ANSWER B. Decrease the FIO2 to 0.60.
A 68-kg (150-lb) man with severe emphysema arrives in the emergency department with
shortness of breath and is placed on a 28% air entrainment mask. ABG samples are drawn
and the results are as follows:
pH
7.34
PaCO2
82 mm Hg
PaO2
43 mm Hg
HCO3
40 mEq/L
BE
+14 mEq/L
On the basis of this information, which of the following ABG levels should the respiratory
therapist be most concerned about?
A. pH
B. PaCO2
C. PaO2
D. >HCO3 - ANSWER C. PaO2
Which of the values below represents the normal value for CVP?
A. 2 to 6 mm Hg
B. 8 to 10 mm Hg
2
tilation:
Mode
Assist-control
Ventilator rate
15/min
Tidal volume
600 mL
FIO2
0.70
PEEP
10 cm H2O
ABGs
pH
7.36
PaCO2
41 mm Hg
PaO2
139 mm Hg
HCO3
25 mEq/L
BE
+2
Which of the following ventilator changes should the respiratory therapist recommend?
1
, A. Decrease the PEEP to 8 cm H2O.
B. Decrease the FIO2 to 0.60.
C. Increase the rate to 20 breaths/min.
D. Decrease the tidal volume to 550 mL. - ANSWER B. Decrease the FIO2 to 0.60.
A 68-kg (150-lb) man with severe emphysema arrives in the emergency department with
shortness of breath and is placed on a 28% air entrainment mask. ABG samples are drawn
and the results are as follows:
pH
7.34
PaCO2
82 mm Hg
PaO2
43 mm Hg
HCO3
40 mEq/L
BE
+14 mEq/L
On the basis of this information, which of the following ABG levels should the respiratory
therapist be most concerned about?
A. pH
B. PaCO2
C. PaO2
D. >HCO3 - ANSWER C. PaO2
Which of the values below represents the normal value for CVP?
A. 2 to 6 mm Hg
B. 8 to 10 mm Hg
2
