Correct Answer: C

Rationale: The correct answer is C: Tachycardia. Tachycardia is a common sign of dehydration because the body tries to compensate for the reduced fluid volume by increasing the heart rate. Bradycardia (choice A) is not typically seen in dehydration as the body tries to maintain perfusion. Increased skin turgor (choice B) is actually a sign of dehydration, but tachycardia is a more specific finding. A bounding pulse (choice D) is associated with conditions like hyperthyroidism or aortic regurgitation, not dehydration.

Correct Answer: C

Rationale: The correct first action for the nurse to take after realizing that the wrong medication has been administered to a client is to monitor vital signs. Monitoring vital signs is crucial as it allows the nurse to promptly assess for any immediate adverse effects that may result from the wrong medication. This immediate assessment is essential for ensuring the client's safety and well-being. Notifying the provider (choice A) and reporting the incident to the nurse manager (choice B) are important steps to take, but they should come after ensuring the client's immediate safety. Filling out an incident report (choice D) is also necessary but should be done after addressing the client's immediate needs.

Correct Answer: B

Rationale: The correct answer is B. Rifampin can cause a harmless reddish-orange discoloration of body fluids, including urine. Choice A is not related to rifampin; vision changes are not a common side effect of the medication. Choice C is more relevant to medications that cause photosensitivity reactions, not specifically rifampin. Choice D is incorrect because nausea is a common side effect of rifampin, but it does not warrant immediate discontinuation of the medication.

Correct Answer: A

Rationale: A heart rate of 78/min is within the normal range; however, postoperative patients require close monitoring for any signs of complications. While the heart rate is normal, other critical findings such as increased pain, excessive bleeding, or other concerning symptoms may need immediate attention. Choices B, C, and D all indicate normal postoperative vital signs and oxygen saturation levels, which do not raise immediate concerns requiring reporting to the provider.

Correct Answer: C

Rationale: The correct answer is C: Tachycardia. Tachycardia is a common sign of dehydration because the body tries to compensate for the reduced fluid volume by increasing the heart rate. Bradycardia (choice A) is not typically seen in dehydration as the body tries to maintain perfusion. Increased skin turgor (choice B) is actually a sign of dehydration, but tachycardia is a more specific finding. A bounding pulse (choice D) is associated with conditions like hyperthyroidism or aortic regurgitation, not dehydration.