Correct Answer: D

Rationale: The best lab test to diagnose disseminated intravascular coagulation (DIC) is the D-dimer test. In DIC, numerous small clots form throughout the body and are rapidly broken down. D-dimer measures a specific fibrin split product and is the most specific test for DIC. Platelet count (Choice A) is decreased in DIC due to consumption, but it is not specific for diagnosing DIC. Prothrombin time (PT - Choice B) and partial thromboplastin time (PTT - Choice C) are both elevated in DIC because clotting factors have been used up, but they are not specific for DIC as they can be elevated in other conditions as well.

Correct Answer: A

Rationale: The correct action for the nurse to take in this situation is to notify the doctor. Significant sero-sanguinous drainage after TKR surgery could indicate a potential issue such as infection or bleeding. The physician needs to be informed promptly to assess the situation and determine the appropriate course of action. Emptying the drain, doing nothing, or removing the drain without consulting the physician could lead to complications going unnoticed or untreated. It is crucial to involve the physician in decision-making to ensure the best outcomes for the client.

Correct Answer: C

Rationale: A client newly diagnosed with Diabetes Mellitus requires education on managing their condition. Choice C is the correct answer because it emphasizes the importance of a comprehensive approach involving both diet and exercise. This holistic approach is crucial in managing blood sugar levels and overall health for individuals with diabetes. Choice A is incorrect as it provides misleading information by suggesting that the client can eat anything as long as it doesn't contain sugar, which is not accurate for diabetes management. Choice B is not the best option as it focuses solely on weight loss rather than addressing the holistic needs of a diabetic individual. Choice D is incorrect as it suggests eliminating all salt, fat, and sugar, which is an extreme approach and not a realistic or balanced way to manage diabetes.

Correct Answer: C

Rationale: In cases where restraints are considered necessary for a patient, it is crucial to communicate effectively with both the patient and their family about the reasons for this decision. This helps ensure that all parties involved understand the necessity of restraints and are informed about the potential risks and benefits. Option A, securing restraints to the bed rails on all extremities, is not appropriate as it does not involve proper communication or ethical considerations. Option B, notifying the physician that restraints have been placed properly, overlooks the importance of patient and family involvement in decision-making. Option D, positioning the head of the bed at a 45-degree angle, is unrelated to the use of restraints and does not address the situation at hand.

Correct Answer: D

Rationale: In patients with a history of cardiac arrhythmia, warming the blood before transfusion can help prevent additional arrhythmias. Cold blood can lead to arrhythmias and should be avoided. Administering pain medication (Choice A) is not directly related to the safe administration of blood. Informing the patient's family in person (Choice B) is important but not the immediate action required for safe transfusion. Decreasing the temperature of the blood to be given (Choice C) would increase the risk of cardiac arrhythmia, contrary to the goal of ensuring patient safety.