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RCP 160 Final Study Guide – Q&A Complete Guide
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RCP 160 Final Study Guide – Q&A Complete GuideDuring 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?
a)
6.0 L/min
b)
6.6 L/min
c)
7.1 L/min
d)
8.0 L/min ✔️Ans -C.
Desired vt= known paco2 x known vt / desired paco2
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 35 mm Hg. To what should the set rate be changed?
a)
11/min
b)
13/min
c)
14/min
d)
15/min ✔️Ans -B. 13/min
Desired f = Known PaCO2 · Known f/Desired PaCO2
A patient with pneumonia and underlying COPD is being mechanically
ventilated in the VC-CMV mode with VT 500 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?
a)
, 400 mL
b)
550 mL
c)
620 mL
d)
800 mL ✔️Ans -C. 620 ml
Desired VT = Known PaCO2 · Known VT/Desired PaCO2
The average tidal volume range in an individual with no pulmonary problems
is which of the following?
a)
4-5 mL/kg IBW
b)
6-8 mL/kg IBW
c)
8-10 mL/kg IBW
d)
12-15 mL/kg IBW ✔️Ans -B. 6-8 ml/kg IBW
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 HCO 25 mEq/L. The most appropriate action to correct the acid-base
disturbance is which of the following?
a)
Increase VT to 595 mL.
b)
Increase VT to 670 mL.
c)
Increase frequency to 16/min.
d)
Decrease frequency to 10/min. ✔️Ans -a. increase vt 595ml
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