Nursing Elites

1. A client with a history of atrial fibrillation is prescribed warfarin. Which lab value should the nurse monitor to assess the effectiveness of this medication?

• A. Hemoglobin
• B. White blood cell count
• C. Platelet count
• D. INR

Correct answer: D

Rationale: The correct answer is D, INR (International Normalized Ratio). The INR is used to monitor the effectiveness of warfarin therapy. Warfarin is an anticoagulant medication commonly prescribed for conditions like atrial fibrillation. Monitoring the INR helps healthcare providers ensure that the blood is clotting within a therapeutic range. Hemoglobin (Choice A), white blood cell count (Choice B), and platelet count (Choice C) are not directly related to monitoring the effectiveness of warfarin therapy in this context.

2. A client with a diagnosis of bipolar disorder is prescribed lithium. Which electrolyte imbalance should the nurse monitor for?

• A. Hyponatremia
• B. Hypokalemia
• C. Hypercalcemia
• D. Hypernatremia

Correct answer: A

Rationale: The correct answer is A: Hyponatremia. Lithium can affect sodium levels in the body, potentially leading to hyponatremia, which is a condition characterized by low sodium levels. This imbalance requires close monitoring as it can lead to symptoms such as confusion, weakness, and even seizures. Choices B, C, and D are incorrect because lithium is not primarily associated with causing hypokalemia, hypercalcemia, or hypernatremia. While these imbalances can occur in certain conditions or with other medications, the main electrolyte imbalance to monitor when a client is prescribed lithium is hyponatremia.

3. What is the homeostatic cellular transport mechanism that moves water from a hypotonic to a hypertonic fluid space?

• A. Filtration
• B. Diffusion
• C. Osmosis
• D. Active transport

Correct answer: C

Rationale: The correct answer is C: Osmosis. Osmosis is the homeostatic cellular transport mechanism that moves water from a hypotonic to a hypertonic fluid space to maintain cellular balance. In osmosis, water moves across a semi-permeable membrane from an area of low solute concentration (hypotonic) to an area of high solute concentration (hypertonic). This process helps regulate the water content inside cells. Choices A, B, and D are incorrect. Filtration involves the movement of solutes and solvents through a membrane due to a pressure difference, diffusion is the movement of solutes from an area of high concentration to low concentration, and active transport requires energy to move substances against their concentration gradient.

4. The nurse is preparing to administer an intramuscular injection to a 6-month-old infant. Which site is most appropriate for this injection?

• A. Deltoid muscle
• B. Ventrogluteal muscle
• C. Dorsogluteal muscle
• D. Vastus lateralis muscle

Correct answer: D

Rationale: The vastus lateralis muscle is the preferred site for intramuscular injections in infants due to its size and safety. The deltoid muscle is typically used for adults and older children. The ventrogluteal muscle is more commonly used in toddlers and older children. The dorsogluteal muscle is not recommended for intramuscular injections in any age group due to its proximity to major nerves and blood vessels, which poses a risk of injury or sciatic nerve damage.

5. The nurse is assessing a client with left-sided heart failure. Which symptom should the nurse expect to find?

• A. Peripheral edema
• B. Jugular vein distention
• C. Shortness of breath
• D. Weight gain

Correct answer: C

Rationale: Shortness of breath is a characteristic symptom of left-sided heart failure. In this condition, the heart's inability to effectively pump blood forward causes blood to back up into the lungs, leading to fluid accumulation. This fluid accumulation results in pulmonary congestion, manifesting as shortness of breath or difficulty breathing. Peripheral edema (choice A) is more commonly associated with right-sided heart failure, where fluid accumulates in the extremities. Jugular vein distention (choice B) is a sign of increased central venous pressure and is more indicative of right-sided heart failure. Weight gain (choice D) can be a general symptom of heart failure due to fluid retention, but shortness of breath is specifically related to left-sided heart failure.

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