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 ["100"]
Explanation
Clindamycin is an antibiotic that can treat infections caused by staphylococci bacteria. It can be given by intermittent IV bolus, which means injecting the drug into a vein over a short period of time. To calculate the infusion rate for clindamycin, we need to use the formula:
Infusion rate (ml/hr) = Volume (ml) / Time (hr)
In this case, the volume is 50 ml and the time is 0.5 hr (30 min). Plugging these values into the formula, we get:
Infusion rate (ml/hr) = 50 ml / 0.5 hr
Infusion rate (ml/hr) = 100 ml/hr
Therefore, the nurse should set the IV pump to deliver 100 ml/hr of clindamycin.
Correct Answer is D
Explanation
A. Pneumothorax: A pneumothorax occurs when air accumulates in the pleural space, causing the lung to collapse. It often presents with unilateral chest pain, dyspnea, and diminished or absent breath sounds on the affected side.
B. Atelectasis: Atelectasis refers to the collapse of alveoli in the lungs, often caused by obstruction, compression, or lack of surfactant. Symptoms include hypoxemia, diminished breath sounds, and shortness of breath.
C. Hemothorax: A hemothorax occurs when blood accumulates in the pleural space. It typically presents with chest pain, dyspnea, and diminished or absent breath sounds on the affected side.
D. Flail Chest: Flail chest results from multiple rib fractures that create a free-floating segment of the chest wall. This condition causes paradoxical chest movement, where the chest wall segment moves inward during inspiration and outward during expiration.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.