Critical Care Nursing Cardiac Questions

Correct Answer: A

Rationale: The correct answer is A. A decrease in the arterial pressure (hypotension) with a low diastolic pressure (46 mmHg) may indicate inadequate perfusion, possibly due to inadequate cardiac output from the mechanical ventilation. This suggests that a change in ventilator settings may be required to improve oxygenation and perfusion. Option B is incorrect because a heart rate of 58 beats/minute alone does not provide direct information on the patient's hemodynamic status. Option C is incorrect as an increased stroke volume would usually be a positive indicator; it does not necessarily indicate a need for changing the ventilator settings. Option D is incorrect as a stroke volume variation of 12% is within normal limits and does not necessarily require a change in ventilator settings.

Correct Answer: D

Rationale: The correct answer is D: No sedation or analgesia. Neuromuscular blocking agents do not provide sedation or pain relief; they solely act on skeletal muscles to induce paralysis for procedures like intubation. Choice A is incorrect because NMB agents do not affect anxiety levels. Choice B is incorrect because NMB agents do not provide analgesia. Choice C is incorrect because NMB agents do not induce sedation. The primary purpose of NMB agents is to induce muscle paralysis without affecting consciousness or pain perception.

Correct Answer: A

Rationale: Step-by-step rationale: 1. Administration of neuromuscular blocking agents can hinder pain or anxiety assessment as it paralyzes the patient, preventing them from communicating discomfort. 2. Delirium may affect the patient's ability to express pain or anxiety, but it does not directly impede assessment and management. 3. Effective nurse communication and assessment skills facilitate, rather than hamper, pain or anxiety assessment. 4. Nonverbal patients can still communicate pain or anxiety through nonverbal cues, so they do not necessarily hinder assessment.

Correct Answer: D

Rationale: The correct answer is D: Synergy model of practice. The Synergy model emphasizes matching nurse competencies with patient needs for optimal outcomes. In this scenario, the charge nurse assigned the experienced, certified nurse to a complex patient requiring specialized care (sepsis, renal replacement therapy, ventilation), aligning with the model's principle of matching nurse expertise to patient acuity. Assigning the less experienced nurse to stable patients aligns with the model's focus on optimizing patient outcomes by matching nurse competencies appropriately. A: Crew resource management model focuses on teamwork and communication to enhance safety, not specifically on nurse-patient assignments. B: National Patient Safety Goals are broad guidelines for improving patient safety, not specific to nurse-patient assignments. C: Quality and Safety Education for Nurses (QSEN) model focuses on integrating quality and safety competencies into nursing education, not specifically on nurse-patient assignments.

Correct Answer: C

Rationale: The correct answer is C: The distal tip of the catheter is in the appropriate position. Rationale: 1. The superior vena cava is a desirable location for a central venous catheter tip placement as it is close to the heart for rapid medication delivery. 2. Catheter tip in the superior vena cava allows for proper venous return and minimizes the risk of complications. 3. The nurse does not need to remove or adjust the catheter if the tip is in the superior vena cava. 4. Advancing the catheter into the pulmonary artery (option D) would be incorrect as it can lead to serious complications. Incorrect choices: A: Incorrect because placement in the superior vena cava is acceptable. B: Incorrect as placement in the superior vena cava does not increase the risk of ventricular dysrhythmias. D: Incorrect as advancing the catheter into the pulmonary artery is unnecessary and risky.