Correct Answer: B

Rationale: The correct answer is B. Administering an intramuscular injection at a 90° angle is essential for proper medication delivery into the muscle tissue. Injecting at a 45° angle is incorrect for intramuscular injections and is typically used for subcutaneous injections where the needle is inserted into the fatty tissue layer beneath the skin. Choice A is correct as selecting a 25-gauge needle is appropriate for an intramuscular injection. Choice C is also correct as the ventrogluteal site is a suitable site for intramuscular injections. Choice D is correct as aspirating for blood return is a necessary step to ensure the needle is not in a blood vessel before injecting the medication.

Correct Answer: A

Rationale: The correct answer is A: Avoid beverages containing caffeine. Caffeine is a stimulant that can interfere with sleep, making it difficult for the client to fall asleep at night. Taking sleep medication regularly (choice B) may not address the root cause of the sleep difficulty and can lead to dependency. Watching television in bed (choice C) can actually stimulate the brain and hinder relaxation before sleep. Advising the client to take several naps during the day (choice D) can disrupt the sleep-wake cycle further. Therefore, recommending the avoidance of caffeine-containing beverages is the most appropriate intervention to help the client improve their ability to sleep at night and function better during the day.

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.

Correct Answer: B

Rationale: When administering a subcutaneous injection, inserting the needle at a 90-degree angle is appropriate. This angle helps ensure proper delivery of the medication into the subcutaneous tissue. Using a 1-inch needle is common for subcutaneous injections to reach the subcutaneous fat layer adequately. Tuberculin syringes are typically used for intradermal injections, not subcutaneous injections. Aspirating before injecting is not necessary for subcutaneous injections as it is primarily used for intramuscular injections to ensure the needle is not in a blood vessel.

Correct Answer: B

Rationale: The priority finding is the clear fluid leaking from the nose, which could indicate a cerebrospinal fluid leak and potential brain injury. This requires immediate attention to assess for possible cerebrospinal fluid leak, which is a serious complication of head trauma and needs prompt intervention to prevent further complications. While a Glasgow Coma Scale score of 13 may indicate a mild alteration in consciousness, it is not as urgent as assessing for a cerebrospinal fluid leak. Nausea and vomiting are common symptoms after head injuries but do not take precedence over assessing for a potential cerebrospinal fluid leak. Anisocoria (unequal pupils) is also important to note but is not as urgent as identifying a possible cerebrospinal fluid leak in this scenario.