Correct Answer: D

Rationale: The correct answer is D: 'I have the right to refuse treatment.' This statement shows an understanding of advance directives because they allow individuals to specify their treatment preferences in advance, including the right to refuse treatment. Choices A, B, and C are incorrect. Choice A is inaccurate as individuals can update or change their advance directives at any time. Choice B is incorrect because while a doctor may discuss advance directives with the client, approval is not required for the directives to be valid. Choice C is also incorrect as a witness is typically required to verify the client's signature, not the other way around.

Correct Answer: B

Rationale: The correct answer is B. A weight gain of 1 kg (2.2 lb) in 24 hours is concerning as it indicates fluid retention, which can be a sign of complications in clients receiving chemotherapy. Rapid weight gain can be associated with conditions like fluid overload or electrolyte imbalances, which need prompt medical attention. Choices A, C, and D are not typically immediate concerns related to chemotherapy. Alopecia (choice A) is a common side effect of chemotherapy, a white blood cell count of 6,000/mm³ (choice C) falls within the normal range, and a temperature of 37.2°C (99°F) (choice D) is slightly elevated but not a critical finding in this context.

Correct Answer: B

Rationale: Digoxin is commonly prescribed to manage atrial fibrillation by controlling heart rate. While Warfarin is used to prevent blood clots, it is not primarily used for controlling heart rate in atrial fibrillation. Aspirin is not the first-line treatment for atrial fibrillation and is generally not recommended for rhythm control. Lisinopril is an ACE inhibitor used to treat high blood pressure and heart failure, but it is not typically prescribed as the primary medication for managing atrial fibrillation.

Correct Answer: A

Rationale: The correct answer is to monitor the INR (International Normalized Ratio) for a patient receiving warfarin therapy. INR monitoring is crucial to assess the effectiveness of warfarin in preventing blood clots while minimizing the risk of bleeding. Monitoring sodium levels (choice B), potassium levels (choice C), or platelet count (choice D) is not specifically essential for patients on warfarin therapy and does not provide direct information on the drug's anticoagulant effects.

Correct Answer: B

Rationale: In the scenario of early decelerations noted during labor with electronic fetal monitoring, the nurse should expect head compression. Early decelerations are a normal response to fetal head compression during contractions and are not indicative of fetal distress. Choice A, fetal hypoxia, is incorrect as early decelerations are not associated with fetal oxygen deprivation. Choices C and D, placenta previa and umbilical cord prolapse, are unrelated to the scenario described and do not cause early decelerations.