Aplastic anemia is a disorder in which the bone marrow cells that develop into mature blood cells become damaged. The damaged bone marrow cells can lead to low numbers of red blood cells, white blood cells, and/or platelets. When the cause of aplastic anemia cannot be diagnosed, the cause is likely which of the following?
Radiation exposure
An autoimmune disorder
Chemotherapy drugs
Toxins
The Correct Answer is B
A. Radiation exposure: Radiation exposure can cause aplastic anemia, but if the cause is unknown, it is less likely to be due to a specific and identifiable event like radiation exposure.
B. An autoimmune disorder: When the cause of aplastic anemia cannot be diagnosed, it is often attributed to an autoimmune disorder where the body attacks its own bone marrow cells.
C. Chemotherapy drugs: Chemotherapy drugs can cause aplastic anemia, but this cause would typically be known based on the patient's medical history.
D. Toxins: Toxins can cause aplastic anemia, but like chemotherapy drugs and radiation, this cause would generally be identifiable.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B","G"]
Explanation
A. Severe pain is a hallmark manifestation of a sickle cell crisis due to vaso-occlusion and tissue ischemia.
B. Fever can occur during a sickle cell crisis, often indicating an underlying infection or inflammatory response.
C. Normal blood counts are not typical during a sickle cell crisis; patients often exhibit anemia, leukocytosis, and thrombocytosis.
D. Clear urine is not a common manifestation of a sickle cell crisis; hematuria or dark-colored urine may occur due to hemolysis or kidney damage.
E. Increased energy levels are not typical during a sickle cell crisis; patients often experience fatigue and malaise.
F. Normal oxygen saturation levels may occur in some patients during a sickle cell crisis, but it is not a consistent finding.
G. Jaundice is common in sickle cell crisis due to hemolysis of red blood cells, leading to an increase in bilirubin levels.
Correct Answer is C
Explanation
A. Creation of a "sterile" environment with laminar airflow rooms is not practical or necessary for preventing transmission of pathogens to patients with depressed bone marrow function. It may also not be feasible in many healthcare settings.
B. Placement of patients in private rooms with HEPA filtration may help reduce airborne pathogens but is not the most important measure for preventing transmission of harmful pathogens to patients with depressed bone marrow function.
C. Strict and frequent handwashing by all people having contact with the patient is the most important measure for preventing transmission of harmful pathogens, including bacteria and viruses, to immunocompromised patients. Hand hygiene is a fundamental infection control measure that significantly reduces the risk of healthcare-associated infections.
D. Administration of prophylactic antibiotics may be part of the treatment plan for some patients with depressed bone marrow function to prevent bacterial infections, but it is not the most important measure for preventing transmission of harmful pathogens. Hand hygiene is more effective in reducing the transmission of a wide range of pathogens, including bacteria, viruses, and fungi.
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