Which of the following interventions is most effective in preventing the development of pressure ulcers in older adults with limited mobility?

Correct Answer: C

Rationale: The correct answer is C because regular repositioning every 2 hours, along with the use of pressure-relieving devices, is the most effective intervention to prevent pressure ulcers in older adults with limited mobility. Repositioning helps to redistribute pressure, reducing the risk of tissue damage. Pressure-relieving devices like cushions or mattresses further help to alleviate pressure points. Choice A is incorrect because strict bed rest and minimal repositioning can actually increase the risk of pressure ulcers by concentrating pressure on specific areas. Choice B is incorrect as high-protein diets and supplements alone do not address the primary cause of pressure ulcers, which is prolonged pressure on the skin. Choice D is incorrect because leaving wounds uncovered can increase the risk of infection and hinder the healing process.

Correct Answer: A

Rationale: The correct answer is A: peripheral arterial disease. Altered level of consciousness in an 81-year-old female is unlikely to be directly caused by peripheral arterial disease. Instead, hypoglycemia, pneumonia, and hypotension from dehydration are common causes of altered mental status in the elderly. Hypoglycemia can lead to brain dysfunction, pneumonia can cause low oxygen levels affecting brain function, and dehydration-induced hypotension can reduce blood flow to the brain. Therefore, peripheral arterial disease is not typically a direct cause of altered consciousness in this scenario.

Correct Answer: D

Rationale: The correct answer is D. Ingesting excessive acetaminophen can lead to liver damage, not renal failure. Diabetes mellitus, prostate hypertrophy causing urinary obstruction, and heart failure are known to cause renal failure due to their effects on kidney function. Diabetic nephropathy can damage the kidneys over time, prostate hypertrophy can obstruct urine flow and lead to kidney damage, and heart failure can result in decreased blood flow to the kidneys, causing renal failure. Thus, D is the correct answer as it does not directly cause renal failure, unlike the other choices.

Correct Answer: B

Rationale: The correct answer is B because social isolation is not directly related to decreased tactile sensations. A, C, and D are consequences of decreased tactile sensations in older individuals. A can occur due to not feeling the temperature, C due to not feeling pressure and injury, and D due to decreased sensation causing falls. Social isolation is more related to emotional or psychological factors rather than physical sensations. It is crucial to differentiate between physical consequences and social consequences when considering the effects of decreased tactile sensations in older individuals.

Correct Answer: B

Rationale: The correct answer is B because super-centenarians, who are individuals aged 110 years or older, often exhibit a high level of functional independence despite their advanced age. This is supported by research showing that many super-centenarians maintain physical and cognitive abilities that allow them to perform daily activities without significant assistance. This statement aligns with the concept of successful aging, where individuals maintain autonomy and independence in later years. Option A is incorrect because a significant number of super-centenarians are not dependent on full-time nursing care for daily activities. Option C is incorrect as many super-centenarians can still engage in social activities despite health limitations. Option D is incorrect as most super-centenarians do not experience severe cognitive decline that affects their daily living.