The nurse admits a patient suspected of opioid overdose.
Which of these findings is consistent with opioid overdose?

Choice A rationale

While nutritional supplements can interact with medications or cause side effects, a sudden onset of confusion two days post-discharge strongly suggests an acute physiological or pharmacological cause. New or changed medications or an infection are much more probable immediate causes for acute mental status change in a recently hospitalized older adult.

Choice B rationale

New medications or changes in dosage often cause acute adverse effects in older adults due to age-related physiological changes that impair drug metabolism (hepatic) and excretion (renal), leading to higher plasma concentrations and potential toxicity. This is a common and critical cause of acute confusion (delirium) following hospital discharge, making it the most important initial assessment.

Choice C rationale

Gait abnormalities are relevant for assessing fall risk or chronic neurological conditions but are not the most immediate or essential step after stabilization for acute confusion. While gait assessment is important, it is secondary to identifying and reversing the immediate cause of the delirium.

Choice D rationale

A dementia screening test assesses for chronic cognitive decline. Sudden onset of confusion is characteristic of delirium, an acute and potentially reversible medical emergency, not dementia. The priority is to identify and treat the underlying acute cause (e.g., medication toxicity, infection), not screen for chronic disorders.

Choice A rationale

Swelling (edema) and redness (erythema) are cardinal signs of localized acute inflammation. Redness results from vasodilation and increased blood flow to the injured site, while swelling is caused by increased capillary permeability, allowing fluid, proteins, and leukocytes to exude into the extravascular tissue space, a process known as exudation.

Choice B rationale

Fever (systemic elevation of body temperature, normal range 36.5°C-37.5°C or 97.7°F-99.5°F) and headache are generally considered systemic manifestations of infection, often resulting from the release of endogenous pyrogens like interleukins and tumor necrosis factor α into the circulation, acting on the hypothalamus's thermoregulatory center.

Choice C rationale

Weakness and malaise (a general feeling of discomfort, illness, or uneasiness) are non-specific systemic symptoms frequently associated with the body's overall response to systemic illness or infection, not specific indicators of the localized pathological changes occurring at the initial site of pathogen entry.

Choice D rationale

Nausea and anorexia (loss of appetite) are typically considered systemic or gastrointestinal symptoms of illness. They are mediated by systemic inflammatory mediators and hormonal changes, often reflecting the widespread physiological impact of the infection rather than the direct local response at the focus of inflammation.