Correct Answer: B

Rationale: A nosebleed (B) in a client receiving heparin is a sign of heparin toxicity and requires immediate action. It indicates that the client is at risk of excessive bleeding. While a prolonged aPTT of 70 seconds (A) is worth monitoring, active bleeding takes precedence. Elevated blood pressure (C) and lightheadedness (D) are potential side effects of heparin but are not as urgently concerning as active bleeding.

Correct Answer: B

Rationale: The correct answer is B: Serum potassium level. Sodium polystyrene sulfonate (Kayexalate) is used to treat hyperkalemia by exchanging sodium ions for potassium ions in the intestines, leading to potassium removal from the body. Monitoring the serum potassium level allows the nurse to assess the effectiveness of this medication in lowering the elevated potassium levels. Serum sodium (A), calcium (C), and glucose (D) levels are not directly impacted by the action of sodium polystyrene sulfonate.

Correct Answer: D

Rationale: An increased respiratory rate can be a sign of various issues postoperatively, including pain. Assessing and managing pain is crucial as it can lead to tachypnea. Pain, anxiety, and fluid accumulation in the lungs can all contribute to an increased respiratory rate. Therefore, determining if pain is causing the tachypnea is the most important intervention to address the underlying cause. Encouraging ambulation, offering snacks, or forcing fluids are not the priority in this situation as pain assessment takes precedence in managing the increased respiratory rate.

Correct Answer: A

Rationale: The correct dietary instruction for a client taking warfarin is to avoid foods high in vitamin K. Warfarin is an anticoagulant that works by inhibiting vitamin K-dependent clotting factors. Consuming foods high in vitamin K, such as leafy green vegetables, can antagonize the effects of warfarin, potentially leading to treatment inefficacy or fluctuations in anticoagulation levels. Therefore, clients on warfarin therapy should be advised to avoid foods high in vitamin K to maintain the effectiveness of the medication. Choices B, C, and D are incorrect because increasing leafy green vegetables (choice B) would introduce more vitamin K, consuming a consistent amount of foods high in potassium (choice C) is not directly related to warfarin therapy, and limiting high-protein foods (choice D) is not a specific concern for clients on warfarin therapy.

Correct Answer: D

Rationale: When a client becomes angry while waiting for a supervised break, it is essential to address their concerns effectively. Reviewing the schedule of outdoor breaks with the client provides concrete information, helps manage the client's expectations, and may alleviate their frustration. This intervention promotes transparency and empowers the client by clarifying the timing of their desired break, fostering a therapeutic and collaborative nurse-client relationship. Encouraging the client to use a nicotine patch (Choice A) does not address the client's immediate frustration with the break schedule. Reassuring the client about another break (Choice B) may temporarily placate them but does not address the underlying issue. Having the client leave the unit with another staff member (Choice C) may not be feasible or appropriate at that moment and does not address the client's concerns.