A nurse is reviewing the laboratory values of a client with bone marrow suppression and is receiving Oprelvekin. Which of the following values would indicate an improvement in the client's condition?
WBC count of 1,800 mm3
WBC count of 3,500 mm3
Hemoglobin level of 11.5 g/dL
Platelet count of 150,000 mm3
The Correct Answer is D
Bone marrow suppression leads to decreased production of blood cells, resulting in leukopenia, anemia, and thrombocytopenia depending on the affected cell line. Oprelvekin is a hematopoietic growth factor primarily used to stimulate platelet production in clients with chemotherapy-induced thrombocytopenia. It acts on bone marrow megakaryocyte progenitor cells to increase platelet formation and reduce bleeding risk. Improvement in therapy is best reflected by rising platelet counts toward the normal range.
Rationale:
A. A WBC count of 1,800 mm³ remains significantly below the normal range and indicates ongoing leukopenia. This level suggests continued bone marrow suppression and increased risk for infection. It does not reflect improvement in hematopoietic function or response to therapy.
B. A WBC count of 3,500 mm³, while improved compared to severe leukopenia, is still below the normal range (typically 4,000–11,000 mm³). Although it may suggest partial recovery of white blood cell production, oprelvekin does not primarily target WBC production. Therefore, this is not the best indicator of therapeutic response.
C. A hemoglobin level of 11.5 g/dL reflects mild anemia but is not directly related to the action of oprelvekin. This medication does not primarily stimulate red blood cell production but instead targets megakaryocyte proliferation. Hemoglobin improvement would be more relevant to erythropoietin therapy rather than oprelvekin.
D. A platelet count of 150,000 mm³ indicates improvement into the lower limit of the normal range (150,000–450,000 mm³). This reflects effective stimulation of megakaryocyte activity by oprelvekin and improved bone marrow recovery. Since the drug is specifically used to increase platelet production, this value best demonstrates therapeutic effectiveness.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Coronary artery bypass graft (CABG) surgery is performed to restore adequate myocardial blood flow in clients with significant coronary artery disease. Preoperative assessment focuses on identifying unstable cardiac conditions that may increase perioperative risk. Signs of acute myocardial ischemia require immediate intervention because they indicate ongoing cardiac tissue hypoxia. Stabilizing the client before surgery is essential to reduce the risk of intraoperative complications and myocardial damage.
Rationale:
A. The client is scheduled to receive preoperative antibiotics is a routine perioperative measure and does not indicate an urgent problem. Antibiotics are commonly administered before CABG surgery to reduce the risk of postoperative infection, particularly mediastinitis. This is standard care and not a condition requiring immediate intervention.
B. The client has a history of hypertension is a common comorbidity in clients undergoing CABG surgery and is expected. While blood pressure must be controlled preoperatively, a history of hypertension alone does not represent an acute or urgent finding. Management typically involves continued medication and monitoring rather than emergency intervention.
C. The client reports severe chest pain and diaphoresis is the most urgent finding because it suggests ongoing myocardial ischemia or possible acute coronary syndrome. These symptoms indicate inadequate oxygen supply to the heart muscle and require immediate evaluation and stabilization before surgery. Proceeding with CABG without addressing active ischemia increases the risk of perioperative myocardial infarction.
D. The client expresses anxiety about the surgery is a common and expected psychological response. Preoperative anxiety can be addressed through education, reassurance, and emotional support. While important for holistic care, it does not represent an immediate physiological threat requiring urgent intervention compared to active cardiac ischemia.
Correct Answer is B
Explanation
Multiple sclerosis (MS) is a chronic autoimmune demyelinating disorder of the central nervous system characterized by periods of relapse and remission. Disease-modifying therapies are used to reduce inflammatory activity, decrease relapse frequency, and slow long-term neurological deterioration. Interferon beta is one of the first-line treatments for relapsing forms of MS. It works by modulating the immune response to reduce autoimmune attack on myelin.
Rationale:
A. Interferon beta medications are indicated for acute relapses of multiple sclerosis is incorrect because these drugs are not used to treat acute exacerbations. Acute relapses are typically managed with high-dose corticosteroids to rapidly reduce inflammation. Interferon beta is a long-term disease-modifying therapy rather than an acute treatment.
B. Interferon beta medication may help to reduce the frequency of relapses and slow disease progression in multiple sclerosis is correct. It modulates immune system activity, reducing inflammatory attacks on myelin and decreasing the number and severity of relapses. Over time, this can also slow the accumulation of neurological disability associated with MS progression.
C. Interferon beta medications are contraindicated for clients who have multiple sclerosis is incorrect because these drugs are specifically approved for use in relapsing forms of MS. They are commonly prescribed as part of first-line disease-modifying therapy to manage the long-term course of the disease.
D. Interferon beta medications are only effective in managing symptoms but do not alter the disease course of multiple sclerosis is incorrect because these medications are disease-modifying rather than purely symptomatic. They reduce disease activity by decreasing immune-mediated damage to myelin, thereby influencing the progression of MS rather than only relieving symptoms.
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