Correct Answer: A

Rationale: Administering an anticoagulant is the nurse's priority action in this situation. Given the client's history of DVT and the presentation of new onset shortness of breath and a productive cough, there is a concern for a pulmonary embolism, which is a life-threatening complication of DVT. Administering an anticoagulant promptly is crucial to prevent further clot formation and to manage the existing clot, reducing the risk of pulmonary embolism. While auscultating lung sounds and preparing for chest physiotherapy are important actions in respiratory assessment and management, the priority in this case is to address the potential complication of a pulmonary embolism by administering the anticoagulant. Notifying the healthcare provider can be done after initiating the immediate intervention of anticoagulant therapy.

Correct Answer: D

Rationale: The correct answer is D because measuring urine output is a task that falls within the UAP's scope of practice and does not require clinical decision-making. Choice A is incorrect because testing blood sugar using Accu-Chek involves interpreting results and possible adjustments, which require a licensed healthcare provider. Choice B is incorrect as discussing signs of hyperglycemia involves education and interpretation that should be done by a nurse. Choice C is incorrect since administering insulin is a high-risk task that necessitates precise dosing and monitoring, thus should not be delegated to UAP.

Correct Answer: C

Rationale: An elevated temperature may indicate infection and should be treated immediately in a client with heart failure.

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: C

Rationale: The correct answer is C. Recognizing signs and symptoms of infection should be the nurse's first priority when developing a teaching plan for a client receiving chemotherapy. Chemotherapy often compromises the immune system, making patients more susceptible to infections. Early identification and prompt treatment of infections are crucial to prevent complications. Options A, B, and D are important aspects of care but recognizing signs of infection takes precedence due to the potential life-threatening consequences in clients undergoing chemotherapy treatment.