Which of the following is true of using a mask during care of a resident in isolation?

Correct Answer: B

Rationale: The correct answer is B: The mask must completely cover the nursing assistant's nose and mouth. This is crucial to prevent the transmission of respiratory droplets and protect both the resident and the caregiver. If the mask does not cover both the nose and mouth, it is not effective. A: The mask should be removed after gloves and gown to prevent contamination, so this statement is incorrect. C: Masks should be changed when wet or visibly soiled, not on a fixed time schedule like every 30 minutes. D: Reusing masks is not recommended due to the risk of contamination and reduced effectiveness. In summary, ensuring that the mask fully covers the nose and mouth is essential for proper protection during care of a resident in isolation.

Correct Answer: C

Rationale: The correct answer is C: At least every two hours. Repositioning residents in wheelchairs every two hours helps prevent pressure ulcers and promotes circulation. Repositioning every 15 minutes (A) or every five minutes (D) is too frequent and can disrupt residents' comfort and activities. Repositioning every hour (B) may not provide adequate relief from prolonged pressure. Hence, repositioning every two hours strikes a balance between prevention and resident wellbeing.

Correct Answer: A

Rationale: The correct answer is A because the brachial pulse is located on the arm inside the elbow, specifically the inner aspect of the upper arm. This pulse is commonly used for blood pressure measurements and is one of the major pulse points in the body. Choices B, C, and D are incorrect as the brachial pulse is not located inside the wrist, on the left side of the chest, or on the right side of the chest. It's important to know the precise location of the brachial pulse for accurate assessment and monitoring of cardiovascular health.

Correct Answer: D

Rationale: The correct answer is D: Soy. Soy can be used as a substitute for dairy products in individuals who are lactose intolerant. Soy milk, tofu, and other soy-based products are good sources of protein and can be easily digested by those with lactose intolerance. Soy is a suitable alternative as it does not contain lactose, unlike dairy products. A: Fiber is not a suitable substitute for dairy products for someone who is lactose intolerant as it does not provide the necessary nutrients found in dairy. B: Salt is not a substitute for dairy products and does not provide the essential nutrients needed in the diet. C: Protein is a good nutrient to include in the diet, but solely relying on protein as a substitute for dairy may not be adequate for individuals who are lactose intolerant.

Correct Answer: A

Rationale: The correct answer is A: Specific gravity test. This test measures the concentration of solutes in urine, indicating the urine density. Specific gravity reflects the kidneys' ability to concentrate urine. The pH test (B) measures acidity, not density. Glucose test (C) is for detecting sugar levels, not density. Occult blood test (D) is used to detect hidden blood in urine, not density. Therefore, specific gravity test is the appropriate choice for measuring urine density.