Correct Answer: C

Rationale: Tumor lysis syndrome (TLS) is a potentially life-threatening condition that occurs when large numbers of cancer cells die rapidly, releasing their contents into the bloodstream. This can overwhelm the kidneys and lead to acute kidney injury. Creatinine is a waste product filtered out of the blood by the kidneys, and an elevated creatinine level is a sign of kidney dysfunction or damage. In TLS, increased creatinine levels indicate that the kidneys are struggling to filter out the excess waste products from cell breakdown, requiring immediate intervention to prevent further complications, such as acute renal failure.

Correct Answer: B

Rationale: In oncology patients, particularly those undergoing chemotherapy or radiation therapy, myelosuppression (the decrease in bone marrow activity that leads to reduced white blood cells, red blood cells, and platelets) increases the risk of infection. Maintaining skin integrity is crucial because the skin acts as the body's first line of defense against infections. If the skin becomes compromised, such as through radiation burns, rashes, or breakdowns, it provides a potential entry point for pathogens, increasing the risk of infection. Since infections in oncology patients can quickly become severe due to their weakened immune systems, maintaining skin integrity is a critical intervention to reduce infection risk, especially for patients who are immunosuppressed.

Correct Answer: B

Rationale: Erythropoietin therapy is used to stimulate the production of red blood cells in patients with myelodysplastic syndrome (MDS), a disorder characterized by ineffective blood cell production, including red blood cells. The primary goal of erythropoietin therapy is to increase red blood cell count, improving the patient's oxygen-carrying capacity and reducing symptoms of anemia, such as fatigue and weakness. Monitoring hemoglobin levels is the best way to evaluate the effectiveness of this therapy because it directly reflects the patient's red blood cell count and the success of erythropoiesis (red blood cell production).

Correct Answer: D

Rationale: Clients with cancer, especially those undergoing chemotherapy or other immunosuppressive treatments, are at increased risk for infections due to a weakened immune system. Changing a litter box exposes the client to pathogens such as Toxoplasma gondii and other harmful bacteria or parasites found in cat feces, which could lead to serious infections. It is recommended that immunocompromised individuals avoid activities like changing litter boxes to reduce their risk of exposure to infectious agents. A family member or caregiver should handle this task to protect the client.

Correct Answer: D

Rationale: While chemotherapy does affect normal, healthy cells-particularly those that divide rapidly-it is not "more likely" to kill normal cells compared to cancer cells. Chemotherapy targets rapidly dividing cells, which includes both cancer cells and some normal cells (like those in hair follicles, the gastrointestinal tract, and bone marrow). However, its primary goal is to kill cancer cells, and its effects on normal cells are a side effect, not the main function. Therefore, the statement that chemotherapy is "more likely" to kill normal cells is inaccurate and indicates a need for further teaching.