A nurse is evaluating an assistive personnel (AP) who is changing a client's bed linens. Which of the following actions by the AP demonstrates medical asepsis?

A. Place a vibrating tuning fork against the midline vertex of the client's head: The Weber test is performed by placing a vibrating tuning fork on the midline of the client's forehead or vertex of the head. This tests for lateralization of sound, helping to distinguish between conductive and sensorineural hearing loss based on which ear hears the sound louder.

B. Have the client repeat a phrase spoken by the nurse while the nurse's mouth is hidden: This action refers to the "speech discrimination test" rather than the Weber test. It is not part of the Weber test, which is specifically used to assess the lateralization of sound.

C. Whisper words for the client to identify: This refers to a different hearing test, called the "whisper test," used to assess hearing ability, not the Weber test. The Weber test specifically uses a tuning fork to assess how sound is heard by the client.

D. Ask the client to occlude one ear with a finger: While blocking one ear can be used in other tests (like Rinne's test), it is not necessary for the Weber test, which involves placing the tuning fork in the center of the head.

A. This image shows well-demarcated, erythematous plaques covered with silvery-white scales—classic features of plaque psoriasis. These lesions typically appear on extensor surfaces like the elbows, knees, and scalp, and may itch or crack.

B. This image shows a yellow crusting lesion which suggests impetigo or a secondary skin infection, not psoriasis. Impetigo typically presents with honey-colored crusts, caused by bacterial infection, usually. Psoriasis lesions are usually dry and scaly, not moist or oozing.

C. This image shows red bumps on arm suggesting an allergic reaction, folliculitis, or possibly contact dermatitis. These are small papules often scattered or in clusters, and do not have the thick scaling seen in psoriasis.

D. The fourth image shows linear striae-like marks likely striae distensae (stretch marks), unrelated to psoriasis. Stretch marks are atrophic, linear scars typically due to skin stretching from growth or weight changes. They lack inflammation, plaques, and scale—all key signs of psoriasis.