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 because a mask must completely cover the nursing assistant's nose and mouth to effectively protect against the transmission of infectious agents. This ensures that respiratory droplets are filtered out. Choice A is incorrect because the mask should be removed after gloves and gown to prevent contamination. Choice C is incorrect as changing the mask every 30 minutes is not necessary unless it becomes visibly soiled or damaged. Choice D is incorrect as masks should not be reused due to the risk of contamination.

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 discomfort. Repositioning every 15 minutes (A) may not be necessary unless prescribed by a healthcare provider for specific cases. Every hour (B) may be too frequent for some residents, leading to unnecessary disruptions. Repositioning every five minutes (D) is too frequent and can be impractical and disruptive. Regular repositioning promotes circulation and prevents skin breakdown without causing unnecessary discomfort.

Correct Answer: A

Rationale: The correct answer is A: On the arm inside the elbow. The brachial pulse is found on the arm, specifically inside the elbow, where the brachial artery runs close to the surface. This location allows for easy palpation and accurate assessment of the pulse rate. Choices B, C, and D are incorrect because the brachial pulse is not located on the wrist (B), left side of the chest (C), or right side of the chest (D). Palpating the brachial pulse in the elbow area is crucial for assessing blood flow and circulation in the upper extremities.

Correct Answer: D

Rationale: The correct answer is D: Soy. Soy products are lactose-free and can be used as a substitute for dairy products in individuals who are lactose intolerant. Soy milk, tofu, and soy-based cheeses are good alternatives. Fiber (choice A) and protein (choice C) are not direct substitutes for dairy products. Salt (choice B) is not a suitable substitute for lactose intolerance. Soy is the best choice due to its lactose-free nature and ability to provide similar nutrients as dairy products.

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 or concentration. Specific gravity test is used to assess the kidney's ability to concentrate urine. The other choices, pH test, glucose test, and occult blood test, do not directly measure urine density. pH test measures the acidity or alkalinity of urine, glucose test detects sugar levels, and occult blood test detects hidden blood in urine. These tests provide different information and are not specific to urine density.