LPN Fundamentals Practice Questions

Correct Answer: C

Rationale: In acute renal failure, the kidneys are unable to excrete potassium efficiently, which can lead to hyperkalemia. As a result, an increased potassium level is a common finding in clients with acute renal failure. Hyperkalemia can have serious cardiac effects, making it essential for healthcare providers to monitor and manage potassium levels closely in clients with renal impairment. Choices A, B, and D are incorrect because in acute renal failure, blood urea nitrogen (BUN) and creatinine levels typically rise due to decreased renal function. Calcium levels are more likely to be decreased in acute renal failure due to impaired activation of vitamin D and subsequent decreased calcium absorption.

Correct Answer: C

Rationale: Positioning the client on their left side is crucial when administering an enema as it helps facilitate the flow of the solution into the sigmoid and descending colon. This position allows gravity to assist in the process. Placing the client on the left side is a standard practice to promote optimal outcomes during the procedure. Choices A, B, and D are incorrect. Choice A provides a specific measurement for the insertion depth of the rectal tube, which is not typically necessary to include in the plan of action. Choice B is essential but not specific to enema administration. Choice D mentions holding the solution bag without specifying the correct height, which should typically be around 18-24 inches above the rectum for a cleansing enema.

Correct Answer: B

Rationale: Measuring the tube from the client's nose to the earlobe to the xiphoid process ensures the tube is inserted to the correct depth. This measurement helps prevent complications such as tube misplacement or lung insertion. Positioning the client with the head of the bed elevated to 30� is important to facilitate easier insertion but is not the most crucial step. Lubricating the entire length of the tube with water-soluble lubricant is essential for smooth insertion but is not the most critical action. Instructing the client to cough during insertion is not necessary and may lead to unnecessary discomfort.

Correct Answer: B

Rationale: The correct answer is B. In hyperlipidemia management, decreasing the intake of foods high in cholesterol is crucial to improve lipid levels and reduce the risk of cardiovascular diseases. Choices A and C are incorrect as increasing intake of saturated fats or trans fats can raise cholesterol levels, worsening the condition. Choice D is incorrect because decreasing intake of foods high in fiber is not recommended as fiber-rich foods are beneficial for heart health, which is important in managing hyperlipidemia.

Correct Answer: B

Rationale: The correct answer is B because decreasing the intake of calcium-rich foods can help manage and prevent the formation of renal calculi. Excessive calcium intake can contribute to the formation of these stones, so reducing calcium-rich foods is a key dietary modification for individuals with renal calculi. Choice A is incorrect as increasing calcium-rich foods can exacerbate the condition. Choice C is incorrect because increasing sodium-rich foods can lead to more stone formation due to increased calcium excretion. Choice D is incorrect as potassium-rich foods do not directly contribute to the formation of renal calculi.