Nokea
A patient is being treated for the effects of a longstanding vitamin B12 deficiency. What aspect of the patients health history would most likely predispose her to this deficiency?
- A. The patient has irregular menstrual periods.
- B. The patient is a vegan.
- C. The patient donated blood 60 days ago.
- D. The patient frequently smokes marijuana.
Correct Answer: B
Rationale: Because vitamin B12 is found only in foods of animal origin, strict vegetarians may ingest little vitamin B12. Irregular menstrual periods, marijuana use, and blood donation would not precipitate a vitamin B12 deficiency.
You may also like to solve these questions
The nurse is caring for a patient who has developed scar tissue in many of the areas that normally produce blood cells. What organs can become active in blood cell production by the process of extramedullary hematopoiesis?
- A. Spleen and kidneys
- B. Kidneys and pancreas
- C. Pancreas and liver
- D. Liver and spleen
Correct Answer: D
Rationale: In adults with disease that causes marrow destruction, fibrosis, or scarring, the liver and spleen can also resume production of blood cells by a process known as extramedullary hematopoiesis. The kidneys and pancreas do not produce blood cells for the body.
A patient has been diagnosed with a lymphoid stem cell defect. This patient has the potential for a problem involving which of the following?
- A. Plasma cells
- B. Neutrophils
- C. Red blood cells
- D. Platelets
Correct Answer: A
Rationale: A defect in a myeloid stem cell can cause problems with erythrocyte, leukocyte, and platelet production. In contrast, a defect in the lymphoid stem cell can cause problems with T or B lymphocytes, plasma cells (a more differentiated form of B lymphocyte), or natural killer (NK) cells.
The nurse is planning the care of a patient with a nutritional deficit and a diagnosis of megaloblastic anemia. The nurse should recognize that this patients health problem is due to what?
- A. Production of inadequate quantities of RBCs
- B. Premature release of immature RBCs
- C. Injury to the RBCs in circulation
- D. Abnormalities in the structure and function RBCs
Correct Answer: D
Rationale: Vitamin B12 and folic acid deficiencies are characterized by the production of abnormally large erythrocytes called megaloblasts. Because these cells are abnormal, many are sequestered (trapped) while still in the bone marrow, and their rate of release is decreased. Some of these cells actually die in the marrow before they can be released into the circulation. This results in megaloblastic anemia. This pathologic process does not involve inadequate production, premature release, or injury to existing RBCs.
A clients health history reveals daily consumption of two to three bottles of wine. The nurse should plan assessments and interventions in light of the patients increased risk for what hematologic disorder?
- A. Leukemia
- B. Anemia
- C. Thrombocytopenia
- D. Lymphoma
Correct Answer: B
Rationale: Heavy alcohol use is associated with numerous health problems, including anemia. Leukemia and lymphoma are not associated with alcohol use; RBC levels are typically affected more than platelet levels.
Fresh-frozen plasma (FFP) has been ordered for a hospital patient. Prior to administration of this blood product, the nurse should prioritize what patient education?
- A. Infection risks associated with FFP administration
- B. Physiologic functions of plasma
- C. Signs and symptoms of a transfusion reaction
- D. Strategies for managing transfusion-associated anxiety
Correct Answer: C
Rationale: Patients should be educated about signs and symptoms of transfusion reactions prior to administration of any blood product. In most cases, this is priority over education relating to infection. Anxiety may be an issue for some patients, but transfusion reactions are a possibility for all patients. Teaching about the functions of plasma is not likely a high priority.