Correct Answer: B

Rationale: The correct answer is B: Be totally honest with him, even if the information is unpleasant. This is the best approach because honesty builds trust and credibility, crucial in a healthcare setting. It allows the teenager to make informed decisions about his care and fosters a therapeutic relationship. Explanation for why the other choices are incorrect: A: Using periods of silence may be misinterpreted as indifference or lack of engagement. C: Promising total confidentiality may not be feasible in healthcare settings and could lead to potential harm if critical information needs to be shared with others for the patient's safety. D: Using slang language may come across as unprofessional and may hinder effective communication and understanding between the nurse and the patient.

Correct Answer: B

Rationale: The correct answer is B: Monitoring vital signs and oxygen saturation. This is the priority intervention because it allows the nurse to assess the patient's current cardiac status and detect any potential complications early. Monitoring vital signs provides crucial information on the patient's cardiovascular stability, while oxygen saturation levels indicate adequate tissue perfusion. Administering pain medication (A) can be important but not the priority. Deep breathing exercises (C) and providing nutritional education (D) are important but not as immediate as monitoring vital signs and oxygen saturation in a patient with a history of myocardial infarction.

Correct Answer: C

Rationale: The correct answer is C because it indicates a misunderstanding about hypertension management. Patients should continue taking medication even if blood pressure is normal to prevent future complications. Monitoring blood pressure regularly (A) is important for tracking progress. Taking medication as prescribed (B) is crucial for controlling blood pressure. Reducing sodium intake (D) helps lower blood pressure. Choice C is incorrect as stopping medication prematurely can lead to uncontrolled hypertension.

Correct Answer: A

Rationale: The correct answer is A: Crossing the legs at the knees. This position can cause hip dislocation due to the twisting motion it creates on the hip joint. When the legs are crossed at the knees, it puts stress on the hip joint, potentially leading to dislocation. Choice B: Sitting with the feet flat on the floor is a safe position that does not put undue stress on the hip joint. Choice C: Sleeping on the affected side can also increase the risk of hip dislocation due to the pressure and weight placed on the hip joint in this position. Choice D: Using assistive devices for ambulation is important for stability and support, and it does not directly contribute to hip dislocation if used correctly.

Correct Answer: C

Rationale: The correct answer is C because the small, flat, brown macules described are consistent with lentigines (commonly known as age or liver spots), which are clusters of melanocytes that appear after prolonged sun exposure. This explanation directly addresses the patient's question about the cause of the spots and is supported by the clinical presentation. Choice A is incorrect because decreased hematocrit related to anemia would not cause these specific skin changes. Choice B is incorrect as destruction of melanin due to sun exposure would result in lighter spots, not dark brown macules. Choice D is incorrect because hyperpigmentation related to decreased perfusion and vasoconstriction would present differently and not primarily on sun-exposed areas like the arms and hands.