Correct Answer: A

Rationale: The correct first action when preparing to administer a medication through a nasogastric (NG) tube is to check the placement of the NG tube. This step is essential to ensure that the tube is correctly positioned in the stomach and not in the lungs, preventing potential complications. Flushing the tube with saline may be required, but it should follow the verification of tube placement. Positioning the client in a semi-Fowler's position is necessary for comfort during the procedure but is not the initial step. Administering the medication can only be done safely after confirming the correct placement of the NG tube.

Correct Answer: A

Rationale: The primary concern when administering IV fluids to a client with a history of congestive heart failure (CHF) is monitoring for signs of fluid overload. Clients with CHF are particularly vulnerable to fluid overload, which can exacerbate their condition. Signs of fluid overload include edema and difficulty breathing. Therefore, the nurse must closely monitor these signs to prevent worsening of the client's condition. Choices B, C, and D are incorrect because while ensuring hydration, preventing electrolyte imbalances, and maintaining the prescribed rate of fluid administration are important, they are secondary concerns compared to the critical task of monitoring for fluid overload in a client with CHF.

Correct Answer: A

Rationale: When a microorganism is found in the blood, this condition is called bacteremia, which refers to the presence of bacteria in the bloodstream, as indicated by a positive blood culture. If not appropriately treated, bacteremia can progress to septicemia, also known as sepsis. Sepsis is a severe and life-threatening response to an infection, characterized by systemic inflammation and organ dysfunction. Parasitic infections involve pathogens other than bacteria and are not directly related to the scenario described.

Correct Answer: B

Rationale: Administering a beta-blocker intravenously is the correct intervention for a patient experiencing a hypertensive crisis. Beta-blockers help quickly reduce blood pressure and prevent complications such as stroke or heart attack. Placing the patient in a supine position can worsen the condition by reducing venous return and increasing the workload of the heart. Encouraging the patient to drink fluids is not recommended as it can exacerbate hypertension by increasing fluid volume. Applying a cold compress to the forehead does not address the underlying cause of the hypertensive crisis and is unlikely to provide significant benefit.

Correct Answer: C

Rationale: The correct answer is assessing the home environment. This process is vital in evaluating whether an elderly client can safely live independently. Factors like safety hazards and the client's ability to handle daily activities are considered during this assessment. Choices A, B, and D are incorrect because determining the client's ability to remain in his residence alone relies more on evaluating the home environment for safety and suitability rather than the client's goals, learning level, or distractions in the home.