Critical Care Nursing Cardiac Questions

Correct Answer: A

Rationale: The correct answer is A because renin activates the renin-angiotensin-aldosterone cascade, which ultimately leads to vasoconstriction, increased blood pressure, and aldosterone release to increase sodium and water reabsorption. Renin does not suppress angiotensin production (B), decrease sodium reabsorption (C), or inhibit aldosterone release (D), as these actions would counteract its role in blood pressure regulation.

Correct Answer: B

Rationale: The correct answer is B: Administration of morphine, 5 mg IV bolus, and initiation of a continuous morphine infusion. Morphine is the preferred pharmacological management for severe dyspnea in end-stage heart failure due to its potent analgesic and anxiolytic properties. Step-by-step rationale: 1. Morphine is a potent opioid that helps relieve dyspnea by reducing anxiety, decreasing respiratory drive, and improving overall comfort. 2. The initial IV bolus of 5 mg provides rapid relief of dyspnea. 3. Initiating a continuous morphine infusion ensures sustained relief of dyspnea. 4. Midazolam (choice A) is a benzodiazepine used for sedation and anxiety, but it is not the first-line treatment for dyspnea in this scenario. 5. Increasing the midazolam (choice C) or morphine (choice D) infusions by 100% dose increments hourly is not appropriate as

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: A

Rationale: The correct answer is A: Apply wet sheets and a fan to the patient. This is the initial treatment for hyperthermia to aid in lowering the body temperature. Wet sheets help in evaporative cooling, while a fan enhances heat loss through convection. This approach is crucial in managing heat-related illnesses quickly. Choices B, C, and D are incorrect as they do not directly address the urgent need to reduce the patient's elevated core temperature. Providing O2, IV fluids, or acetaminophen can be considered later in the management, but the priority is to rapidly lower the body temperature in a hyperthermic patient to prevent further complications.

Correct Answer: A

Rationale: The correct answer is A: Increase functional residual capacity. Positive end-expiratory pressure (PEEP) helps increase the functional residual capacity by keeping the alveoli open at the end of expiration. This prevents alveolar collapse, improves ventilation-perfusion matching, and enhances oxygenation. B: Prevent collapse of unstable alveoli - This is incorrect because PEEP actually helps prevent the collapse of all alveoli, not just unstable ones. C: Improve arterial oxygenation - This is partially correct, but the primary mechanism through which PEEP improves oxygenation is by increasing functional residual capacity. D: Open collapsed alveoli - This is incorrect because PEEP helps prevent alveolar collapse rather than actively opening already collapsed alveoli.