Correct Answer: D

Rationale: The correct answer is D: 'Avoid visiting if you've had a recent infection.' Before a hematopoietic stem cell transplantation, it is essential for visitors to refrain from visiting if they have had a recent illness or vaccination to minimize the risk of infection to the patient. Choice A is incorrect because emphasizing a negative outcome is not beneficial to the patient or their family. Choice B is incorrect as it is not necessary to abstain from food for a hematopoietic stem cell transplantation. Choice C is irrelevant to the situation as wearing a hospital gown is not the key information for family and friends to be aware of.

Correct Answer: B

Rationale: Arm edema on the operative side (lymphedema) is a known complication after a mastectomy. This can indicate impaired lymphatic drainage, leading to fluid accumulation in the arm. Pain at the incision site is expected postoperatively and may not necessarily indicate a complication. Sanguineous drainage in the Jackson-Pratt drain is a common finding in the immediate postoperative period. Complaints of decreased sensation near the operative site could be related to nerve damage or surgical manipulation, but it is not a typical complication after a mastectomy.

Correct Answer: A

Rationale: The correct action by the nurse is to assess the client's blood pressure and pulse. Difficulty breathing can be a sign of various conditions, including cardiac issues. Assessing blood pressure and pulse helps in determining the client's hemodynamic status and identifying any cardiovascular compromise. Option B is less crucial as attaching the client to a pulse oximeter may provide oxygen saturation levels but does not directly assess cardiac output. Option C is not the priority in this situation as the client's difficulty breathing is a more urgent concern. Option D is incorrect as urgent radiation therapy is not indicated based on the client's presentation.

Correct Answer: A

Rationale: The correct answer is A. Secondary MDS can occur at any age and results from prior toxic exposure to chemicals, including chemotherapeutic medications. Asking about exposure to toxic chemicals in previous jobs directly addresses the potential etiology of this patient's health problem. Choices B, C, and D are not as directly related to the etiology of secondary MDS. Recurrent infections (Choice B) are not a known cause of MDS. Family history (Choice C) is more pertinent to primary MDS, which has a genetic component, while sun exposure (Choice D) is not associated with the etiology of MDS.

Correct Answer: D

Rationale: The correct answer is to elevate the affected arm. Elevating the affected arm helps prevent lymphedema after a mastectomy. Choices A, B, and C are incorrect. 'Dangling arms at the bedside' does not provide any benefit after a mastectomy. 'Lying down on the affected chest' can cause discomfort and possible complications. 'Drinking plenty of fluids immediately after surgery' is not related to preventing lymphedema post-mastectomy.