A nurse is reviewing the BUN and creatinine levels of an older adult patient with chronic kidney disease. The nurse should anticipate which of the following findings?
BUN 8 mg/dL and creatinine 0.7 mg/dL
BUN 45 mg/dL and creatinine 8 mg/dL
BUN 23 mg/dL and creatinine 1.0 mg/dL
BUN 10 mg/dL and creatinine 0.3 mg/dL
The Correct Answer is B
Choice A reason:
A BUN level of 8 mg/dL and a creatinine level of 0.7 mg/dL are within normal ranges for a healthy individual without kidney disease. In chronic kidney disease (CKD), we would expect these values to be elevated due to the kidneys' reduced ability to filter waste products from the blood.
Choice B reason:
A BUN level of 45 mg/dL and a creatinine level of 8 mg/dL are significantly higher than the normal range, which is consistent with impaired kidney function seen in CKD. These elevated levels indicate that the kidneys are not effectively filtering urea and creatinine from the blood, leading to their accumulation.
Choice C reason:
A BUN level of 23 mg/dL and a creatinine level of 1.0 mg/dL could be seen in the early stages of CKD. While the creatinine level is within the normal range, the BUN level is slightly elevated, which may suggest a decline in kidney function.
Choice D reason:
A BUN level of 10 mg/dL and a creatinine level of 0.3 mg/dL are both below the normal range. This is an unlikely finding for a patient with CKD, as kidney impairment typically leads to increased levels of these substances in the blood.
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Correct Answer is A
Explanation
Choice A reason:
The statement about eating a high fiber diet reducing the risk for developing skin cancer is misleading. While a high fiber diet has many health benefits, there is no direct evidence that it significantly reduces the risk of skin cancer. Skin cancer prevention primarily focuses on protecting the skin from excessive sun exposure and avoiding ultraviolet (UV) light sources.
Choice B reason:
Avoiding the use of tanning booths is correct advice. Tanning booths emit UV radiation, which can increase the risk of skin cancer, including melanoma, the deadliest form of skin cancer. The use of tanning beds is strongly discouraged by health professionals.
Choice C reason:
Using sunscreen even on cloudy days is also correct. UV rays can penetrate through clouds, and sun protection is necessary regardless of the weather to reduce the risk of skin cancer. Sunscreen should be applied to all exposed skin and reapplied regularly, especially after swimming or sweating.
Choice D reason:
Checking the skin monthly for any changes is an important part of skin cancer prevention. Early detection of changes in moles or new skin growths can lead to early diagnosis and treatment, which is crucial for a better prognosis. This practice should be encouraged as part of routine self-care.
Correct Answer is B
Explanation
Choice A reason:
Malignant melanoma typically presents as a mole that changes in color, size, or feel and has irregular edges. It may also itch, ooze, or bleed. A raised, flesh-colored lesion with pearly white borders is not characteristic of malignant melanoma.
Choice B reason:
Basal cell carcinoma often appears as a raised, pearly bump, sometimes with visible blood vessels, which may have a central depression. The description of the lesion as raised, flesh-colored with pearly white borders aligns with the common presentation of basal cell carcinoma.
Choice C reason:
Squamous cell carcinoma usually presents as a firm, red nodule, or a flat lesion with a scaly, crusted surface. The lesion described does not match the typical appearance of squamous cell carcinoma.
Choice D reason:
Actinic keratosis is characterized by rough, scaly patches on sun-exposed areas of the skin, which may be precancerous. They are not typically described as raised, flesh-colored lesions with pearly borders.