During mechanical ventilation of a patient with COPD, the PaCO2 = 58 mm Hg and the minute ventilation = 5.5 L/min. The desired PaCO2 for this patient is 45 mm Hg. To what should the minute ventilation be changed? correct answers 7.1 L/min
A patient with CHF is being mechanically ventilated. The ...
during mechanical ventilation of a patient with co
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During mechanical ventilation of a patient with COPD, the PaCO2 = 58 mm Hg and the minute
ventilation = 5.5 L/min. The desired PaCO2 for this patient is 45 mm Hg. To what should the
minute ventilation be changed? correct answers 7.1 L/min
A patient with CHF is being mechanically ventilated. The patient's current PaCO2 = 28 mm Hg,
and the ventilator set rate is 16 per minute. The desired PaCO2 for this patient is 40 mm Hg. To
what should the set rate be changed? correct answers 11/min
A patient with pneumonia and underlying COPD is being mechanically ventilated in the VC-
CMV mode with VT 650 mL. The resulting PaCO2 is 62 mm Hg. What change should be made
to the VT to obtain a desired PaCO2 of 50 mm Hg for this patient? correct answers 800mL
A male patient (76-kg IBW) with no history of pulmonary disease is brought to the emergency
department for treatment of a drug overdose. He is intubated and placed on mechanical
ventilation with VC-CMV, f = 12/min, VT = 450 mL. The resulting arterial blood gas values are:
pH 7.32, PaCO2 53 mm Hg, and HCO3- 25 mEq/L. The most appropriate action to correct the
acid-base disturbance is which of the following? correct answers Increase VT to 595 mL
A female patient (59-kg IBW) with no history of pulmonary disease is being invasively
ventilated with VC-CMV, f = 12/min, VT = 470 mL, PEEP = 5 cm H2O, FIO2 = 0.5. ABG
results with these settings are: pH 7.31, PaCO2 54 mm Hg, PaO2 92 mm Hg, SaO2 90%, HCO3-
24 mEq/L. The most appropriate action for the respiratory therapist to take is which of the
following? correct answers Increase f to 16/min.
A male patient (74-kg IBW) is being ventilated with PC-CMV, f = 12/min, PIP = 20 cm H2O, TI
= 1.5 seconds; the resulting flow-time scalar is shown below. The patient's measured VT is 435
mL. ABG results on these settings are: pH 7.32, PaCO2 54 mm Hg, HCO3- 25 mEq/L. The most
appropriate action to take is which of the following? correct answers Increase PIP to 27 cm H2O.
A 28-year-old female (55-kg IBW) is being mechanically ventilated with VC-CMV, f = 14/min,
VT = 700 mL. The patient has no history of pulmonary disease. The resulting ABG values are:
pH 7.55, PaCO2 27 mm Hg, HCO3- 23 mEq/L. The most appropriate action to take is which of
the following? correct answers Decrease VT to 450 mL.
A male patient (83-kg IBW) is intubated and ventilated with PC-CMV, f = 12/min, set PIP = 28
cm H2O, resulting in a VT of 430 mL. The ABG results on this setting are: pH 7.35, PaCO2 45
mm Hg, and HCO3- 23 mEq/L. Forty-eight hours later on the same settings, the ABG results are:
pH 7.54, PaCO2 27 mm Hg, and HCO3- 21 mEq/L with an exhaled VT of 800 mL. The most
appropriate action at this time is which of the following? correct answers Decrease PIP to 19 cm
H2O.
A patient with an IBW of 68 kg is intubated and being mechanically ventilated with VC-CMV, f
= 12/min, and VT = 470 mL. The patient has a combined respiratory rate of 25/min. The ABG
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