Correct Answer: D

Rationale: In the context of an elderly client, assessing renal function before administering a nephrotoxic medication is crucial. While urinalysis and blood urea nitrogen provide valuable information on hydration status and overall health clues, they are not specific indicators of renal function. The chemistry of electrolytes may show abnormalities in renal failure, but it does not directly measure the kidneys' ability to eliminate waste. Creatinine clearance, on the other hand, is considered the best indicator for renal function in the elderly. This test accounts for decreases in lean body mass that can affect blood creatinine levels and is widely used to estimate the glomerular filtration rate, reflecting the kidneys' filtration capability. Therefore, creatinine clearance is the most appropriate lab test to assess renal function in this scenario.

Correct Answer: C

Rationale: The correct answer is the statement, 'I can leave the diaphragm in place as long as I want after intercourse.' This statement indicates a lack of understanding about the correct use of the diaphragm. The diaphragm must be left in place for at least 6 hours after intercourse to ensure effectiveness and reduce the risk of pregnancy. Leaving the diaphragm in place for an extended period can lead to toxic shock syndrome. Choice A is correct as spermicidal cream needs to be reapplied before each act of intercourse for optimal contraceptive efficacy. Choice B is a correct statement as the diaphragm should be filled with spermicidal cream before insertion to increase its effectiveness. Choice D is also accurate as the diaphragm can be inserted up to 6 hours before intercourse to allow time for proper placement and effectiveness.

Correct Answer: B

Rationale: Guillain-Barré syndrome is characterized by a severe complication of respiratory failure due to the involvement of the peripheral nerves that control breathing. While Bell's palsy, trigeminal neuralgia, and tetanus are also conditions affecting peripheral nerves, they do not typically lead to respiratory failure like Guillain-Barré syndrome. Bell's palsy causes facial muscle weakness, trigeminal neuralgia results in severe facial pain, and tetanus leads to muscle stiffness and spasms, but none of these conditions directly involve respiratory failure.

Correct Answer: B

Rationale: In late-stage Alzheimer's disease, although verbal communication may be challenging or limited, it is essential to maintain communication through talking and non-verbal cues like touching. Limiting communication can lead to feelings of isolation and worsen the emotional well-being of the individual. Choices A, C, and D reflect appropriate care strategies by addressing toileting needs, oral care, and assistance with eating and drinking, which are crucial aspects of caregiving for a client with late-stage Alzheimer's disease.

Correct Answer: A

Rationale: The transplacental transfer of maternal antibodies supplements the infant's weak response to infection until approximately 3 to 4 months of age. While the infant starts producing immunoglobulin (Ig) soon after birth, it only reaches about 60% of the adult IgG level, 75% of the adult IgM level, and 20% of the adult IgA level by 1 year of age. Breast milk provides additional IgA protection. Although the immune system matures during infancy, full protection against infections is not achieved until early childhood, putting the infant at risk for infections. Choice B is incorrect because maternal antibody protection typically lasts around 3 to 4 months, not until the infant is 12 months old. Choice C is incorrect as infants are not shielded from all infections due to their immature immune system. Choice D is incorrect because while breastfeeding offers extra protection, it does not guarantee complete immunity against infections.