The nurse recognizes that patients with von Willebrand disease are at risk for prolonged bleeding times for which reason?
Adequate platelet production.
Deficiency in intrinsic clotting system factor.
Impairment of the thrombin fibrinogen reaction.
Variable factor VIII deficiencies and platelet dysfunction.
The Correct Answer is D
Choice A rationale:
Adequate platelet production does not explain the prolonged bleeding times in von Willebrand disease. These patients often have normal platelet counts, but their platelets do not function properly due to the absence or dysfunction of von Willebrand factor.
Choice B rationale:
Deficiency in intrinsic clotting system factor is not the primary cause of prolonged bleeding times in von Willebrand disease. The deficiency or dysfunction of von Willebrand factor, a protein that helps platelets adhere to the blood vessel walls and clot properly, is the key issue in this disorder.
Choice C rationale:
Impairment of the thrombin fibrinogen reaction does not directly relate to von Willebrand disease. This disorder primarily involves platelet dysfunction and variable factor VIII deficiencies, leading to prolonged bleeding times.
Choice D rationale:
Variable factor VIII deficiencies and platelet dysfunction are characteristic of von Willebrand disease. Factor VIII helps with blood clotting, and its deficiency, along with impaired platelet function, contributes to the prolonged bleeding times in patients with von Willebrand disease.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale:
Hypertensive crisis is characterized by severely elevated blood pressure, usually above 180/120 mm Hg. The given differences in blood pressure (a decrease of 20 mm Hg in systolic BP) do not indicate hypertensive crisis.
Choice B rationale:
An auscultatory gap refers to a temporary disappearance of sounds normally heard over the brachial artery during blood pressure measurement. This phenomenon can lead to inaccurate readings and might cause a delay in recognizing the true blood pressure values. In this case, the decrease in systolic BP when changing positions indicates the presence of an auscultatory gap, requiring the nurse to be vigilant during blood pressure measurements.
Choice C rationale:
Resistant hypertension is a term used when blood pressure remains above goal despite concurrent use of three antihypertensive agents of different classes. The given scenario does not indicate resistant hypertension but rather suggests a technical issue during blood pressure measurement due to the auscultatory gap.
Correct Answer is B
Explanation
Choice A rationale:
Hemophilia is a hereditary disorder caused by a deficiency of specific clotting factors, and it is indeed hereditary in nature. This statement is incorrect.
Choice B rationale:
Hemophilia is a bleeding disorder where the blood does not clot properly. Replacement therapy, which involves infusing clotting factor concentrates, is a standard treatment for hemophilia. This statement is correct.
Choice C rationale:
Hemophilia is an X-linked recessive genetic disorder, not dominant. Males are more commonly affected because they have only one X chromosome, and if it carries the defective gene, they will have hemophilia. Females have two X chromosomes, and if one X chromosome carries the defective gene, the other X chromosome can compensate, making them carriers but not typically affected.
Choice D rationale:
Hemophilia A is the most common form of hemophilia, not hemophilia B.
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