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 D
Explanation
Choice A rationale:
Stenosis of the heart valves typically leads to murmurs and changes in heart sounds but does not directly impact blood pressure regulation.
Choice B rationale:
Decreased adrenergic sensitivity might lead to lower heart rate and blood pressure, not an increase in systolic blood pressure as seen in this case.
Choice C rationale:
Increased parasympathetic activity would lead to decreased heart rate, not an increase in systolic blood pressure as observed in the patient.
Choice D rationale:
Loss of elasticity in arterial vessels is the correct answer. With aging, arterial walls become less flexible and more rigid due to the accumulation of calcium and collagen. This loss of elasticity results in increased systolic blood pressure, which is the top number in a blood pressure reading. The diastolic pressure, represented by the bottom number, does not usually increase significantly with age. This change is a result of arteriosclerosis, which commonly occurs in elderly individuals.
Correct Answer is A
Explanation
Choice A rationale:
Chronic stable angina typically occurs with both activity and rest due to the increased oxygen demand of the heart during exertion. It is relieved with rest or nitroglycerin, which helps to decrease the heart's workload. This choice accurately represents the characteristic of chronic stable angina.
Choice B rationale:
Chronic stable angina usually lasts for a short duration, usually around 5 minutes, and is relieved with rest or nitroglycerin. Prolonged pain lasting 10-15 minutes or more could indicate an unstable angina or myocardial infarction. This choice is incorrect for chronic stable angina.
Choice C rationale:
Pain due to chronic stable angina subsides when the precipitating factor, such as physical exertion, is resolved or with medication like nitroglycerin. Therefore, this statement is incorrect for chronic stable angina.
Choice D rationale:
Chronic stable angina follows a predictable pattern, occurring intermittently over a period of time, and is usually triggered by physical exertion or emotional stress. This option does not accurately represent the typical pattern of chronic stable angina.
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