A child is diagnosed with atopic dermatitis. Which laboratory test would the nurse expect the child to undergo to provide additional evidence for this condition?
Serum immunoglobulin E (IgE) level
Potassium hydroxide prep
Wound culture
Erythrocyte sedimentation rate
The Correct Answer is A
A. Atopic dermatitis is associated with allergic sensitization and an overactive immune response. Children with this condition often have elevated IgE levels, which provides supportive evidence of an atopic or allergic etiology. Measuring IgE can also help identify specific allergens that may trigger or worsen symptoms.
B. This test is used to detect fungal infections, such as ringworm or yeast infections. While fungal infections can complicate or mimic dermatitis, a KOH prep does not diagnose atopic dermatitis.
C. A wound culture identifies bacterial infections, such as Staphylococcus aureus, which can occur as a secondary complication in atopic dermatitis. However, it does not confirm the underlying condition itself.
D. ESR measures nonspecific systemic inflammation and can be elevated in many conditions, but it is not specific enough to be used as diagnostic evidence for atopic dermatitis.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Two veins and one artery is an abnormal configuration. This pattern is not consistent with normal fetal circulation and may indicate a congenital anomaly.
B. One artery and one vein (single umbilical artery) is a known variation, but it is considered abnormal and can be associated with renal, cardiac, or chromosomal anomalies.
C. The normal umbilical cord contains two arteries and one vein. The umbilical vein carries oxygenated, nutrient-rich blood from the placenta to the fetus, supporting growth and development. The two umbilical arteries carry deoxygenated blood and waste products from the fetus back to the placenta for elimination. This arrangement ensures efficient bidirectional circulation between the fetus and placenta. Inspecting the cord after birth helps the nurse identify abnormalities that may require further evaluation.
D. Two arteries and two veins is not a typical configuration and may suggest a congenital anomaly or cord malformation.
Correct Answer is C
Explanation
A. Arterial blood gas analysis evaluates oxygenation, ventilation, and acid-base balance, but it does not indicate infection or inflammation.
B. Gastric lavage is used to remove ingested substances from the stomach, not to detect infection or inflammatory processes.
C. Erythrocyte sedimentation rate (ESR) is a nonspecific test that measures the rate at which red blood cells settle in a tube over a specific time. An elevated ESR can indicate the presence of inflammation or infection in the body.
D. Blood cultures are used to identify the specific pathogen causing an infection but do not measure the general presence of an inflammatory process.
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