A patient, admitted with respiratory failure, is intubated and placed on the ventilator with the following settings: Continuous mandatory volume (CMV) rate of 12 breaths per minute. TV 500 mL. Fi02 50% and PEEP 5 cm H20. The following arterial blood gases are obtained: pH 7.30. PaCO2 50 mmHg HCO3 23 mEq/L. PaO2 82 mmHg. Which of the following ventilator changes would the nurse recommend in the SBAR to the physician?
An increase in the CMV rate
Change to SIMV MODE
A decrease in The PaO2
A decrease in the CMV rate
The Correct Answer is B
A. An increase in the CMV rate:
Increasing the continuous mandatory volume (CMV) rate would provide more mandatory breaths, which may not address the patient's respiratory acidosis. It could potentially worsen the situation by causing respiratory alkalosis.
B. Change to SIMV (Synchronized Intermittent Mandatory Ventilation) MODE
The patient's arterial blood gas results indicate respiratory acidosis with an elevated PaCO2 (50 mmHg) and a low pH (7.30). The nurse would recommend changing to SIMV mode to allow for spontaneous breaths in addition to the set mandatory breaths. This change helps the patient to have more control over their respiratory efforts and may assist in lowering the PaCO2.
C. A decrease in the PaO2:
Decreasing the partial pressure of oxygen (PaO2) is not an appropriate response, especially when the patient is already on mechanical ventilation and has a moderate PaO2 level. The primary concern is the elevated PaCO2 and respiratory acidosis.
D. A decrease in the CMV rate:
Decreasing the CMV rate would reduce the number of mandatory breaths, potentially allowing the patient to hypoventilate further and retain more carbon dioxide. This is not the appropriate intervention for a patient with respiratory acidosis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["8"]
Explanation
To calculate the infusion rate for the IV solution, the nurse needs to use the formula:
Infusion rate (gtt/min) = Volume (mL) x Drop factor (gtt/mL) / Time (min)
Plugging in the given values, we get:
Infusion rate (gtt/min) = 150 mL x 10 gtt/mL / 180 min
Simplifying, we get:
Infusion rate (gtt/min) = 8.33 gtt/min
Since the answer needs to be rounded to the nearest whole number, the final answer is:
Infusion rate (gtt/min) = 8 gtt/min
Correct Answer is B
Explanation
A. “Check your oxygen equipment once each week.”
Checking the oxygen equipment once a week is insufficient. The equipment should be regularly inspected for safety, including tubing, connections, and the condition of the oxygen concentrator or tank.
B. “Do not adjust the oxygen flow rate.”
The nurse should include in the teaching that the client should not adjust the oxygen flow rate without consulting their healthcare provider. Adjusting the oxygen flow rate without proper guidance can lead to inappropriate oxygen delivery, which may be harmful.
C. “Store unused oxygen tanks horizontally.”
Oxygen tanks should be stored in an upright position to prevent damage to the tank valve. Storing them horizontally can increase the risk of leaks or damage.
D. “Keep wool blankets on your bed.”
Wool blankets and other items that generate static electricity should be avoided near oxygen equipment, as they can increase the risk of fire. The client should be advised to use non-static bedding and clothing.
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