A patient presents to the clinic with complaints of suprapubic discomfort and problems with urination. After reviewing her lab results, you notice that her creatinine and BUN (Blood Urea Nitrogen) levels are elevated. What do these elevated levels indicate?
Vitamin D deficiency
Dehydration or kidney dysfunction
Respiratory acidosis
Liver failure or cirrhosis
The Correct Answer is B
Choice A reason: Vitamin D deficiency affects calcium and bone health, not creatinine or BUN levels, which reflect kidney function. Elevated BUN and creatinine point to dehydration or kidney issues, so this is incorrect for the lab findings.
Choice B reason: Elevated creatinine and BUN indicate dehydration or kidney dysfunction, as these markers rise when kidneys fail to clear waste or when blood volume is low. This matches the patient’s symptoms, making it the correct choice.
Choice C reason: Respiratory acidosis affects blood pH and CO2, not creatinine or BUN, which are renal markers. Kidney dysfunction or dehydration better explain the lab results, so this is incorrect for the findings.
Choice D reason: Liver failure may elevate other markers (e.g., bilirubin), but BUN and creatinine are kidney-specific. Dehydration or kidney dysfunction align with the labs and symptoms, so this is incorrect.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason: Smoking is a significant risk factor for ischemic stroke, contributing to vascular damage. However, hypertension has a stronger association, directly causing arterial stress and clot formation, so this is less critical than hypertension.
Choice B reason: Diabetes increases stroke risk by promoting atherosclerosis, but its impact is less immediate than hypertension, which directly elevates arterial pressure and stroke likelihood. Thus, diabetes is incorrect as the most significant factor.
Choice C reason: Hypertension is the most significant risk factor for ischemic stroke, as it damages arteries, promotes clot formation, and increases stroke incidence. Isky’s history highlights this as the primary contributor, making it correct.
Choice D reason: Age (65) is a stroke risk factor, but hypertension’s direct impact on vascular health outweighs age alone. Isky’s controllable risk factor, hypertension, is more significant, so this is incorrect.
Correct Answer is C
Explanation
Choice A reason: Insufficient mast cell numbers are not a primary cause of impaired healing in older adults. Mast cells contribute to inflammation, but chronic diseases like diabetes disrupt multiple healing pathways more significantly, making this incorrect.
Choice B reason: Circulatory impairment, such as atherosclerosis, can delay healing by limiting oxygen and nutrient delivery. However, it’s often a consequence of chronic illnesses like diabetes, which broadly affect healing, making this less primary than chronic conditions.
Choice C reason: Underlying chronic illnesses, like diabetes or cardiovascular disease, impair inflammation and wound healing in older adults by disrupting immune function, collagen deposition, and perfusion. These prevalent conditions directly impact healing, making this the correct cause.
Choice D reason: Complement and chemotaxis deficiencies occur in specific immunodeficiencies, not commonly in aging. Chronic illnesses like diabetes more consistently impair healing through systemic effects, making this a less likely primary cause.
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