Critical Care Nursing Questions

Correct Answer: B

Rationale: The correct answer is B: Central nervous system depression. This factor can lead to respiratory acidosis by depressing the respiratory drive, causing hypoventilation and retention of carbon dioxide. Anxiety and fear (A) may lead to hyperventilation, reducing carbon dioxide levels. Diabetic ketoacidosis (C) results in metabolic acidosis, not respiratory acidosis. Nasogastric suctioning (D) may cause respiratory alkalosis from excessive removal of carbon dioxide. Thus, central nervous system depression is the most likely factor predisposing a patient to respiratory acidosis.

Correct Answer: A

Rationale: The correct answer is A because a cooler right hand may indicate compromised circulation, potentially due to arterial occlusion or clot formation. This could lead to inadequate perfusion and tissue damage. Immediate action is needed to assess and address the cause. Choice B is incorrect because a MAP of 77 mm Hg is within the normal range for most patients and does not require immediate action. Choice C is incorrect as delivering 3 mL of flush solution per hour is an appropriate rate and does not indicate a need for immediate action. Choice D is incorrect as the flush bag and tubing being changed 3 days ago does not necessarily indicate an immediate issue with the arterial line function.

Correct Answer: B

Rationale: The correct answer is B because applying an insulin sliding scale method based on research is an example of evidence-based practice. This method is derived from scientific evidence and research studies, ensuring the best outcomes for the patient. The other choices lack the same level of evidence-based rationale: A is based on a protocol, which may not be evidence-based; C is a standard safety practice, not necessarily evidence-based; D is a decision based on hospital policy or practicality, not specifically evidence-based.

Correct Answer: B

Rationale: The correct answer is B. The nurse's priority is to ensure the patient's safety and well-being. Calling the rapid response team will allow for immediate assessment by a team of healthcare professionals to address the deteriorating condition. This step takes precedence over troubleshooting the ventilator or manually ventilating the patient. Asking for a new ventilator (A) or manually ventilating the patient (D) does not address the urgent need for a comprehensive assessment and intervention. Continuing to troubleshoot the alarm (C) can delay critical interventions needed for the patient's worsening condition. Thus, calling the rapid response team is the most appropriate action to address the escalating clinical situation promptly.

Correct Answer: B

Rationale: The correct answer is B: A deep vein thrombosis from lower extremities. Deep vein thrombosis (DVT) is the most common cause of a pulmonary embolus as a blood clot can dislodge from the veins, travel to the lungs, and block blood flow. An amniotic fluid embolus (Choice A) occurs during childbirth and is rare as a cause of pulmonary embolism. A fat embolus (Choice C) typically occurs after a long bone fracture and is more likely to cause issues in the lungs. Vegetation from an infected central venous catheter (Choice D) can cause septic pulmonary embolism, but it is not as common as DVT.