delirium and infections

Infections and Delirium

  • Importance of Admission Procedures

    • Lab work is critical during the admission of a patient.
    • Necessary tests include:
    • Respiratory panel
    • Urinalysis
    • Chest X-ray
    • These tests help rule out underlying infections, especially in older adults.

  • Impact of Infections on Older Adults

    • Older patients are particularly susceptible to infections like Urinary Tract Infections (UTIs).
    • Infections can lead to delirium, often misinterpreted as a psychiatric condition.
    • Administration of psychotropic medications will not address the underlying infectious cause of delirium.

  • Symptoms of Delirium

    • Patients may exhibit:
    • Confusion
    • Combativeness
    • Irritability
    • Restlessness
    • Rational communication becomes ineffective with such patients.

  • Treatment Approaches for Delirium

    • Delirium management depends on the cause:
    • For alcohol-related delirium (delirium tremens), benzodiazepines are indicated.
    • For amphetamine-induced psychosis, antipsychotics (e.g., intramuscular antipsychotic) may be needed.
    • It is crucial to allow the substance or infection to clear from the patient’s system to effectively treat delirium.

  • Characteristics of Delirium vs. Dementia

    • Delirium:
    • Rapid onset
    • Short duration
    • Self-limiting
    • Dementia:
    • Gradual onset
    • Long-term condition (progressively chronic)
    • Once established, it cannot be reversed.

Dementia

  • Overview of Dementia

    • Alzheimer’s disease is the most prevalent type of dementia.
    • Age range affected is typically between 40s and 80s or even older.

  • Cognitive Declines in Alzheimer's Disease

    • Memory loss sequence:
    • Short-term memory loss typically is the first symptom.
    • Patients may first forget where items are located, then lose passwords, followed by forgetting important dates like anniversaries and birthdays.
    • As the condition worsens, patients may eventually forget the names of loved ones and, ultimately, their own name.

  • Medications Used for Alzheimer's Disease

    • The primary classes of medications include:
    • Acetylcholinesterase inhibitors, such as Aricept.
    • Glutamate-affecting medications.
    • Mechanism of Action of Acetylcholinesterase Inhibitors:
    • These drugs aim to temporarily increase levels of acetylcholine in the brain, which may help delay symptom progression.
    • By blocking the enzyme that breaks down acetylcholine, they seek to enhance memory function.
    • Limitations of Medications:
    • Medications primarily work in mild to moderate stages but are ineffective in severe cases.
    • They do not alter the underlying pathophysiology of Alzheimer’s or repair anatomical structures of the brain.

  • Progression and Prognosis of Dementia

    • Dementia ultimately leads to severe complications, such as loss of the ability to eat and drink.
    • Patients become at risk for aspiration and may wander away from home, which often leads to alerts like silver alerts.
    • Diagnostic Procedures:
    • Definitive diagnosis requires autopsy following death; although cognitive exams and MRIs may indicate potential changes related to dementia, they are not definitive.
    • Autopsy remains the only guaranteed method to diagnose dementia accurately post-mortem.
    • Brain changes indicative of dementia may include brain atrophy, which can be observed through imaging techniques.