A client with chronic peripheral arterial disease (PAD) asks the nurse why this disease developed. Which explanation by the nurse is most accurate?
"Excess sodium from hypertension causes direct injury to the arteries, reducing blood flow and causing obstruction."
"Excess fats in your diet are stored in the lining of the arteries, causing them to constrict."
"A combination of platelets and fats accumulate, narrowing the artery and reducing blood flow to the extremities."
"Injury to the arteries causes them to spasm, reducing blood flow to the extremities."
The Correct Answer is C
Choice A Reason
While hypertension can contribute to the development of PAD, it does not directly cause fats to deposit in the arteries. Hypertension can damage the arterial walls, making them more susceptible to atherosclerosis, but it is not the primary mechanism of PAD development.
Choice B Reason
Excess fats in the diet can contribute to atherosclerosis, which is the accumulation of plaques in the arterial walls. However, the fats do not simply get stored; they combine with other substances, including calcium and inflammatory cells, to form plaques that can restrict blood flow.
Choice C Reason
This statement is the most accurate. PAD is primarily caused by atherosclerosis, which is the buildup of plaques formed by fats, cholesterol, calcium, and other substances in the blood. These plaques can harden and narrow the arteries, leading to reduced blood flow to the extremities. The process can be exacerbated by factors such as smoking, diabetes, and high cholesterol.
Arterial spasms can occur, but they are not the typical cause of chronic PAD. Spasms are more often associated with conditions like Raynaud's phenomenon or can be a response to stress or cold temperatures. PAD is usually a result of progressive atherosclerosis rather than intermittent spasms.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice a reason:
A history of allergy to iodine is a critical finding to report before a coronary angiography because the contrast dye used in the procedure typically contains iodine. Patients with an iodine allergy may experience severe reactions, including anaphylaxis, which can be life-threatening. Precautions such as premedication with steroids and antihistamines or the use of alternative contrast agents may be necessary.
Choice b reason:
A serum potassium level of 4.0 mEq/L is within the normal range, which is approximately 3.5 to 5.2 mEq/L for adults. Therefore, this finding is not significant and does not need to be reported to the healthcare provider prior to the procedure.
Choice c reason:
A blood pressure reading of 138/90 mmHg is slightly elevated but does not reach the threshold for stage 1 hypertension, which starts at 140/90 mmHg for individuals under 60 years of age. While it should be monitored, it is not an urgent concern that needs to be reported immediately before a coronary angiography unless the patient shows symptoms of hypertensive crisis.
Choice d reason:
An EKG showing atrial fibrillation is an important finding; however, it is not typically a contraindication for coronary angiography unless the patient is hemodynamically unstable or symptomatic. Atrial fibrillation can increase the risk of stroke, but anticoagulation management is usually the focus rather than postponing necessary diagnostic procedures.
Correct Answer is C
Explanation
Choice A Reason
Urine negative for ketones is a normal finding and does not typically indicate an acute problem. Ketones in the urine can be a sign of uncontrolled diabetes or starvation, but their absence is expected in a well-nourished individual who is not in a state of diabetic ketoacidosis.
Choice B Reason
Sodium at 135 mg/dL and Potassium at 3.5 mEq/L are within normal ranges. The normal range for serum sodium is approximately 135-145 mEq/L, and for serum potassium, it is around 3.5-5.0 mEq/L. These values do not indicate an immediate concern for the patient with urosepsis.
Choice C Reason
A BUN of 34 mg/dL and Creatinine of 4.2 mg/dL are concerning. The normal range for BUN is approximately 6-20 mg/dL, and for Creatinine, it is about 0.6-1.2 mg/dL for males and 0.5-1.1 mg/dL for females. Elevated levels of BUN and Creatinine indicate impaired kidney function, which can be a complication of urosepsis and the nephrotoxic effects of gentamicin and vancomycin.
Choice D Reason
A white blood cell count of 12,000/mm³ is slightly elevated, which may be expected in a patient with an infection such as urosepsis. The normal range is approximately 4,500-11,000 WBCs/mm³. While this should be monitored, it does not require immediate reporting unless there is a significant change or it is outside the patient's baseline.
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