The physician suspects a client has a dermatological infection. Which of the following diagnostics will be ordered to observe color changes to the skin using an ultraviolet light source?
Culture
KOH
Diascopy
Wood's
The Correct Answer is D
Choice A Reason: Culture is not a diagnostic test that uses an ultraviolet light source, but a laboratory test that involves growing microorganisms from a sample of body fluid or tissue. Culture can help identify the type and sensitivity of the infection-causing agent.
Choice B Reason: KOH is not a diagnostic test that uses an ultraviolet light source, but a chemical test that involves applying potassium hydroxide to a sample of skin, hair, or nail. KOH can help diagnose fungal infections by dissolving the keratin and revealing the fungal elements under a microscope.
Choice C Reason: Diascopy is not a diagnostic test that uses an ultraviolet light source, but a physical test that involves applying pressure to a lesion with a glass slide or lens. Diascopy can help differentiate between blanchable and non-blanchable lesions, such as erythema or petechiae.
Choice D Reason: Wood's is a diagnostic test that uses an ultraviolet light source, also known as a Wood's lamp or black light. Wood's can help observe color changes to the skin that are not visible under normal light, such as fluorescence or hypopigmentation. Wood's can help diagnose conditions such as tinea capitis, vitiligo, or erythrasma.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A Reason: Soft pasty stool is normal for a transverse colostomy, as the stool has not reached the sigmoid colon where most of the water is absorbed.
Choice B Reason: This is the correct answer because purple discoloration of the stoma indicates ischemia or necrosis, which can lead to infection, perforation, or sepsis. It requires urgent intervention.
Choice C Reason: Stoma is beefy red is a normal finding for a healthy stoma, as it indicates adequate blood supply and healing.
Choice D Reason: There is skin excoriation around the stoma is a common complication of a colostomy, as the stool can irritate the skin. It can be managed with proper skin care and appliance fitting.
Correct Answer is C
Explanation
Choice A Reason: The test does not assess for sun protection factor, but rather for contact dermatitis. Sun protection factor is a measure of how well a sunscreen protects the skin from ultraviolet radiation, which can cause sunburn and skin damage.
Choice B Reason: The test is not inconclusive, but rather positive for some allergens and negative for others. The test involves applying small patches of different substances to the skin and observing for any reactions after 48 hours.
Choice C Reason: This is the correct choice. The presence of erythema indicates you are allergic to the allergen, as it shows inflammation and irritation of the skin due to an immune response. Erythema is redness of the skin that can be accompanied by itching, swelling, or blisters.
Choice D Reason: The areas that did not turn red do not indicate low risk for skin cancer, but rather no reaction to the allergen. Skin cancer is a malignant growth of abnormal cells in the skin that can be caused by various factors, such as genetic mutations, exposure to carcinogens, or immunosuppression.
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