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Which is not associated with hypersplenism:
- A. splenomegaly
- B. pancytopenia
- C. hyper cellular bone marrow
- D. reversibility by splenectomy
Correct Answer: C
Rationale: Step-by-step rationale:
1. Hypersplenism is characterized by splenomegaly (A), causing sequestration and destruction of blood cells.
2. Pancytopenia (B) results from excessive destruction of blood cells in the enlarged spleen.
3. Hypercellular bone marrow (C) is not directly associated with hypersplenism; it is a compensatory response to increased blood cell destruction.
4. Splenectomy (D) can reverse the effects of hypersplenism by removing the source of blood cell destruction.
Therefore, the correct answer is C as hypercellular bone marrow is a secondary response to hypersplenism, not a direct association.
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Busulfan therapy lead to all except:
- A. hyperpigmentation
- B. pulm .Fibrosis
- C. optic neuritis
- D. BM suppression
Correct Answer: C
Rationale: The correct answer is C: optic neuritis. Busulfan therapy is known to cause adverse effects such as hyperpigmentation, pulmonary fibrosis, and bone marrow suppression due to its cytotoxic effects. However, optic neuritis is not a reported side effect of busulfan therapy. Optic neuritis is more commonly associated with other medications or conditions affecting the optic nerve. Therefore, the absence of optic neuritis as a known side effect of busulfan therapy makes choice C the correct answer.
A hospitalized client has a platelet count of 58,000/mm3 (58 × 109/L). What action by the nurse is most appropriate?
- A. Encourage high-protein foods.
- B. Institute neutropenic precautions.
- C. Limit visitors to healthy adults.
- D. Place the client on safety precautions.
Correct Answer: D
Rationale: The correct answer is D: Place the client on safety precautions. With a platelet count of 58,000/mm3, the client is at risk for bleeding due to thrombocytopenia. Placing the client on safety precautions will help prevent injuries and minimize bleeding risks. This includes using a soft-bristled toothbrush, avoiding IM injections, and using caution with activities that may cause trauma.
A: Encouraging high-protein foods is not directly related to managing the client's thrombocytopenia.
B: Neutropenic precautions are for clients with low white blood cell counts, not low platelet counts.
C: Limiting visitors to healthy adults is important for clients with compromised immune systems, not specifically for thrombocytopenia.
Busulfan therapy lead to all except:
- A. hyperpigmentation
- B. pulm .Fibrosis
- C. optic neuritis
- D. BM suppression
Correct Answer: C
Rationale: The correct answer is C: Optic neuritis. Busulfan therapy is known to cause adverse effects like hyperpigmentation, pulmonary fibrosis, and bone marrow suppression due to its cytotoxic nature. However, optic neuritis is not a common side effect associated with busulfan. Optic neuritis typically occurs due to inflammation of the optic nerve and is more commonly linked to conditions like multiple sclerosis. Therefore, in the context of busulfan therapy, optic neuritis is not a expected side effect, making it the correct answer.
The patient is a 2-month-old boy who presented with a skin abscess and is febrile. On exam, he is noted to have silvery hair and hypopigmented skin. A CBC shows a leukocyte count of 3.4 K/mcL with 10% neutrophils. What does the abnormality on the peripheral smear suggest?
- A. Abnormal lysosomal biogenesis
- B. Abnormal ribosome function
- C. Abnormal phagocytosis of opsonized particles
- D. Abnormal mitochondrial activity
Correct Answer: A
Rationale: The correct answer is A: Abnormal lysosomal biogenesis. In this case, the clinical presentation of silvery hair and hypopigmented skin suggests a diagnosis of Chediak-Higashi syndrome, a rare autosomal recessive disorder affecting lysosomal function. The abnormal leukocyte count and neutrophil percentage indicate impaired immune function due to defective lysosomal biogenesis. The other choices, B: Abnormal ribosome function, C: Abnormal phagocytosis of opsonized particles, and D: Abnormal mitochondrial activity, do not align with the clinical presentation and laboratory findings of this specific case.
Which of the following characteristics are similar with respect to Factor VIII and von Willebrand factor (vWF)?
- A. Both are made in endothelial cells and megakaryocytes.
- B. Both are activated by thrombin.
- C. They are present in normal to high relative amounts in newborns.
- D. They are stored in Weibel-Palade bodies in endothelial cells.
Correct Answer: C
Rationale: Rationale:
- Factor VIII and vWF are present in normal to high amounts in newborns due to the physiological immaturity of the hemostatic system.
- Choice A is incorrect as vWF is mainly produced in endothelial cells while Factor VIII is produced in both endothelial cells and liver.
- Choice B is incorrect as Factor VIII is activated by thrombin, but vWF is not.
- Choice D is incorrect as vWF is stored in Weibel-Palade bodies, but Factor VIII is not.