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?

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.

Choice A Reason: This choice is incorrect. Placing the client into a supine position is not an action that the nurse should take, as it can compromise the airway and increase the risk of aspiration. The nurse should position the client on their side with their head tilted slightly forward to allow saliva and secretions to drain out of their mouth.

Choice B Reason: This choice is incorrect. Applying restraints is not an action that the nurse should take, as it can cause injury and increase agitation. The nurse should protect the client from harm by removing any objects or furniture that may cause harm and padding any hard surfaces with blankets or pillows.

Choice C Reason: This choice is incorrect. Inserting a bite stick into the client's mouth is not an action that the nurse should take, as it can cause injury and obstruction. The nurse should never force anything into the client's mouth during a seizure, as it can damage their teeth, gums, tongue, or jaw.

Choice D Reason: This is a correct choice. Loosening restrictive clothing is an action that the nurse should take, as it can improve breathing and circulation. The nurse should unbutton any tight collars, belts, or ties that may constrict the chest or neck.

Choice E Reason: This is a correct choice. Placing a pillow under the client's head is an action that the nurse should take, as it can prevent injury and provide comfort. The nurse should support the client's head with a soft pillow or cushion to prevent hitting it against any hard surfaces.