Correct Answer: B

Rationale: The correct next step for the nurse is to ask the client to discuss a 'do not resuscitate' (DNR) order with her healthcare provider. While the client's wishes should be respected, it is essential to ensure proper documentation and legal protection by involving the healthcare provider in this decision-making process. Documenting the request in the medical record (Choice A) is important but should follow the discussion with the healthcare provider. Consulting the ethics committee (Choice C) may not be necessary at this stage and could delay the necessary actions. Discharging the client (Choice D) without further discussion is not appropriate and disregards the importance of addressing the client's wishes in a respectful and professional manner.

Correct Answer: C

Rationale: A potassium level of 6.2 mEq/L indicates hyperkalemia, which is dangerous and requires immediate treatment. Administering a potassium-binding medication will help lower potassium levels and prevent life-threatening complications.

Correct Answer: D

Rationale: The correct answer is to increase the humidity of the oxygen source. This action helps thin thick secretions, making them easier to clear from the tracheostomy tube. Increasing fluid intake (Choice A) can be beneficial in some cases but addressing humidity is more specific to managing thick secretions in a client with a tracheostomy. Tracheal suctioning (Choice B) should be done after attempting to thin the secretions with increased humidity. Administering a mucolytic agent (Choice C) is a possible intervention but typically comes after addressing humidity and before resorting to suctioning to avoid unnecessary invasiveness.

Correct Answer: B

Rationale: A potassium level of 6.5 mEq/L indicates hyperkalemia, which can lead to life-threatening arrhythmias. The correct priority action for the nurse is to notify the healthcare provider immediately. Hyperkalemia requires prompt intervention to lower potassium levels and prevent complications. Administering a potassium supplement (Choice A) would worsen the condition. Administering calcium gluconate (Choice C) is a treatment option but is not the nurse's priority action. Restricting the client's potassium intake (Choice D) may be necessary but is not the immediate priority when facing a critical potassium level.

Correct Answer: C

Rationale: In managing a client with Type 2 diabetes experiencing frequent hyperglycemic episodes and with a high A1C level, it is crucial to coordinate carbohydrate-controlled meals and subcutaneous injections. This approach helps regulate blood glucose levels effectively. Mixing glargine with aspart insulin (Choice A) is not a recommended practice as these insulins have different onset and peak times. Teaching foot care (Choice B) is important in diabetes management but is not the priority in this scenario. Reviewing site rotation for insulin injections (Choice D) is important to prevent lipodystrophy but is not the immediate action needed to address the client's hyperglycemia and high A1C level.