A 15-year-old patient is to receive antihemophilic factor (Factor VIll) replacement therapy. He asks the nurse, "Why does this always happen to me? How come my sisters don't have hemophilia?”. The nurse's response should be based on the understanding that hemophilia is characteristic of which type of hereditary disorder?
X-linked dominant.
Autosomal recessive.
Autosomal dominant.
X-linked recessive.
The Correct Answer is D
Choice A rationale:
X-linked dominant disorders are characterized by a mutation on the X chromosome that results in the expression of the trait in both males and females. Hemophilia, however, is more commonly associated with males, which is not consistent with an X-linked dominant pattern.
Choice B rationale:
Autosomal recessive disorders require the inheritance of two mutated alleles, one from each parent, to express the trait. Hemophilia does not follow this pattern, as the patient's sisters do not have the condition despite having affected parents.
Choice C rationale:
Autosomal dominant disorders only require the inheritance of one mutated allele from an affected parent to express the trait. Hemophilia does not align with an autosomal dominant pattern, as the patient's sisters would likely be affected if it were.
Choice D rationale:
Hemophilia is a classic example of an X-linked recessive disorder. The gene responsible for producing clotting factor is located on the X chromosome, and males have only one X chromosome, making them more susceptible to the disorder. Females, with two X chromosomes, usually act as carriers unless both X chromosomes carry the mutation.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice D rationale:
Preschool-aged children may fear pain and bleeding, and applying a small dressing after venipuncture helps alleviate anxiety. It provides a sense of control and comfort, as the child perceives their active participation in caring for the site.
Choice A rationale:
Showing the needle and syringe might intensify anxiety in the child, making venipuncture more distressing. It's important to minimize any distress during the procedure.
Choice B rationale:
Allowing the child to help cleanse the site could lead to more anxiety as the child might interpret it as their own responsibility for the procedure.
Choice C rationale:
Encouraging the child to show the site to adults may not be reassuring for the child and could potentially exacerbate their apprehension.
Correct Answer is D
Explanation
Choice D rationale:
Monitoring the cardiac catheterization site for bleeding is the priority nursing intervention when a child feels nauseous and vomits after a cardiac catheterization. Bleeding from the catheterization site could lead to serious complications and requires immediate attention.
Choice A rationale:
Applying a cool cloth to the child's forehead can provide comfort, but it doesn't address the potential complication of bleeding from the catheterization site.
Choice B rationale:
Offering the child sips of orange juice is not appropriate if the child is nauseous and vomiting. Fluid intake should be monitored, but bleeding assessment takes priority.
Choice C rationale:
Applying pressure to the cardiac catheterization site is not the priority intervention. Monitoring for bleeding and assessing the site are more important.
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