Critical Care Nursing Exam Questions

Correct Answer: A

Rationale: The correct answer is A because comparing measured pressures with other physiological parameters ensures accuracy and consistency. This step helps in interpreting the RA P/CVP reading correctly. Choice B is incorrect as flushing the catheter with saline is not necessary for obtaining the pressure reading. Choice C is incorrect as inflating the balloon with air is not part of the correct procedure. Choice D is incorrect because obtaining the measurement during exhalation can affect the accuracy of the reading.

Correct Answer: A

Rationale: The correct answer is A: Graduated compression stockings. These stockings help prevent blood from pooling in the legs, reducing the risk of DVT and PE. They improve circulation and reduce venous stasis. Option B, heparin, is used for treatment, not prevention. Option C, sequential compression devices, help prevent DVT but are not as effective as compression stockings. Option D, strict bed rest, can actually increase the risk of DVT by reducing blood flow.

Correct Answer: C

Rationale: Step-by-step rationale for why choice C is correct: 1. Intrapulmonary shunting refers to blood bypassing the normal oxygenation process in the lungs. 2. Choice C describes blood being shunted from the right side of the heart (deoxygenated blood) to the left side without oxygenation, leading to systemic circulation without oxygenation. 3. Choices A, B, and D do not accurately describe intrapulmonary shunting as they focus on other concepts like alveolar perfusion, heart failure, and unilateral lung blood supply, respectively.

Correct Answer: A

Rationale: The correct answer is A, hypotension. During hemodialysis for acute kidney injury, fluid removal can lead to hypotension due to rapid changes in blood volume. This can cause dizziness, weakness, and even loss of consciousness. Dysrhythmias (choice B) are less common but can occur due to electrolyte imbalances. Muscle cramps (choice C) may occur during or after dialysis due to electrolyte imbalances or fluid shifts, but they are not as common as hypotension. Hemolysis (choice D) is not a common complication of hemodialysis for acute kidney injury, as it is more commonly associated with issues related to the dialysis machine or blood tubing.

Correct Answer: D

Rationale: The correct answer is D: �Recovery is possible, but it may take several months.� This response is the best choice as it provides a balanced and accurate explanation to the patient. Here's the rationale: 1. Hemodialysis is often used as a temporary measure to support kidney function while allowing time for the kidneys to recover. 2. Acute kidney injury can be reversible in some cases, especially if the underlying cause is identified and treated promptly. 3. Recovery time varies for each individual, and it can indeed take several months for kidney function to improve. 4. Choices A, B, and C are incorrect: - A is overly pessimistic and does not consider the potential for recovery. - B provides a specific timeframe that may not be accurate for all patients. - C is not a reliable indicator of kidney function recovery and may lead to confusion.