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 B
Explanation
A. Integrity of the dressing:
Dressing integrity is important for wound care, but it is not the top priority when considering the client's immediate postoperative needs.
B. Need for suctioning
Maintaining a patent airway is crucial after a total laryngectomy. The absence of a larynx removes the client's ability to breathe through the nose and mouth, so maintaining a clear airway is a top priority. Suctioning may be necessary to remove secretions and maintain airway patency.
C. Patency of the intravenous line:
Intravenous line patency is important for fluid and medication administration, but it is not the priority when compared to maintaining a clear airway.
D. Level of pain:
Pain management is important for the client's comfort, but it is not the immediate priority compared to ensuring a patent airway following a total laryngectomy.
Correct Answer is A
Explanation
A. “I have not received any of my medications today.”
The statement "I have not received any of my medications today" requires follow-up from the nurse because it indicates a potential issue with the client's medication administration. It's important to ensure that the client receives the prescribed medications in a timely manner.
B. “Do you know when I will be going home?”
This is a question about the discharge plan and does not indicate an immediate issue that requires follow-up.
C. “I do not know how to make the remote control work.”
While it's a statement about the client's understanding of the remote control, it is not an urgent matter that requires immediate attention.
D. “My dressing was changed earlier this morning.”
This statement indicates that a care task (dressing change) has been completed and does not suggest a problem that requires urgent follow-up.
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