Possible cause of delirium in elderly patient?

NORCET 3 - 2022 (Shift-1)

Medical & Surgical Nursing

Easy

Appeared in: NORCET 3 - 2022 (Shift-1)

Explanation

Delirium is an acute syndrome characterized by disturbances in attention, awareness, and cognition, which develops over a short period and tends to fluctuate.
It is especially common in elderly, hospitalized patients and is often caused by the interplay of multiple factors.
Drug withdrawal, particularly from alcohol and benzodiazepines, is a classic precipitant of a hyperactive delirium.
Hypoxia impairs brain function by disrupting oxidative metabolism, leading to confusion and altered mental status.
Trauma, including direct head injury or the systemic stress of surgery, is a major physiological insult that can trigger delirium.
Since all the individual options are well-established causes, the most accurate and comprehensive choice is 'All of the above'.

Option A: This option is a correct cause of delirium, but it is incomplete. Choosing this answer ignores other valid causes presented, such as hypoxia and trauma.
Option B: While hypoxia is a critical and common cause of delirium, it is not the only possibility. The other options are also significant triggers.
Option C: Trauma is a valid precipitating factor for delirium, but it is not the only one. The other options represent common metabolic and substance-related causes.

Visual 1: Flowchart: The 'I WATCH DEATH' mnemonic, visually breaking down the common causes of delirium for easy memorization.
Visual 2: Comparison Table: Key differences between Delirium, Dementia, and Depression, focusing on onset, course, attention, and consciousness to aid in differential diagnosis.

Clinical Relevance

Nursing practice connection: Use the key finding related to Etiology of Delirium in Geriatric Patients to guide bedside assessment, documentation, and the next nursing action.
Delirium is a medical emergency. A nurse's ability to promptly recognize the signs and initiate investigation into the underlying cause is critical to prevent complications like falls, pressure injuries, and long-term cognitive decline.
The Confusion Assessment Method (CAM) is a standard, evidence-based tool that nurses should use to screen for delirium in at-risk patients.
Non-pharmacological interventions are the first line of management: reorientation, maintaining sleep-wake cycles, ensuring hydration, and managing sensory impairments (e.g., providing glasses and hearing aids).

How to Approach the Question

First, analyze the question stem. It asks for 'possible' causes of delirium in an 'elderly patient'. The word 'possible' suggests there could be multiple correct answers.
Evaluate each option individually based on your clinical knowledge. Is drug withdrawal a cause of delirium? Yes. Is hypoxia a cause? Yes. Is trauma a cause? Yes.
Notice the presence of an 'All of the above' option. This is a strong indicator when you have identified that multiple preceding options are factually correct.
Confirm your reasoning by recalling that delirium is a syndrome with a wide range of potential etiologies, making it highly plausible that all listed factors are valid.
Therefore, select 'All of the above' as the most comprehensive and correct choice.

Concept Tested & Keywords

Concept Tested: Etiology of Delirium in Geriatric Patients
Stem keywords: delirium, elderly patient, cause
Lead-in keywords: Possible cause
Clinical cues: The term 'elderly patient' is a significant cue, as this population has a higher risk and vulnerability for developing delirium from various physiological stressors.

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