DEMENTIA + DELIRIUM

BRAIN STRUCTURE AND BASIC COGNITIVE FUNCTIONS

• Cerebrum: The primary site for processing information, responsible for executive functions including thinking and memory.

• Cerebellum: The center for balance and motor coordination.

• Brainstem: The control center for vital functions essential for survival, including breathing and heart rate (HR).

COMMON COGNITIVE PROBLEMS IN OLDER ADULTS

• Dementia: A chronic and progressive syndrome of cognitive decline.

• Alzheimer’s Disease (AD): The most common form of dementia.

• Delirium: An acute state of confusion.

• Depression: Often presents in older adults and can mimic cognitive impairment.

CAUSES OF ALTERED COGNITION

Altered cognition is not limited to the elderly and can occur in any individual due to:

• Ischemia: Defined as a decrease ($\downarrow$) in blood flow to the brain.

• Poor Nutrition: Lack of essential nutrients required for brain function.

DEMENTIA: DEFINITION AND CLINICAL MANIFESTATIONS

• Definition: Dementia is a clinical syndrome, not a normal part of the aging process. It is characterized by the progressive loss of:

  • Memory

  • Orientation

  • Attention

  • Language

  • Judgment and reasoning

  • Personality and behavioral changes

• Functional Impact: Progression leads to an inability to maintain employment (work), sustain interpersonal relationships, and perform Activities of Daily Living (ADLs).

ETIOLOGY AND RISK FACTORS FOR DEMENTIA

• Etiological Types:

  • Alzheimer’s Disease: Accounts for $60\text{–}80\%$ of cases.

  • Vascular Dementia: Accounts for approximately ($\sim$) $20\%$ of cases.

  • Lewy Body Dementia: Accounts for approximately ($\sim$) $10\%$ of cases.

  • Normal pressure hydrocephalus

  • Creutzfeldt-Jakob disease

  • Mixed dementia (combination of types)

• Risk Factors Specific to Vascular Dementia:

  • Fluid and electrolyte imbalance

  • Infection

  • Sleep deprivation

  • Environmental stress

  • Medications and drugs

  • Smoking

  • Atrial fibrillation

  • Hypertension

  • High cholesterol

  • Diabetes

  • Coronary Artery Disease (CAD)

  • Metabolic syndrome

• Reversible and Systemic Causes:

  • Multiple sclerosis

  • AIDS

  • Alcoholism

  • Brain injury, tumors, or meningitis

  • Vitamin deficiencies: specifically Vitamin $B_1$, Vitamin $B_{12}$, and folate

  • Hepatic encephalopathy

  • Drugs: including opioids, hypnotics, cocaine, etc.

COMPARATIVE CLINICAL FEATURES: NORMAL FORGETFULNESS VS. DEMENTIA

• Normal Aging/Forgetfulness:

  • Occasionally misplacing keys.

  • Sometimes forgetting errands.

  • Occasional word-finding difficulty.

  • Maintains the ability to laugh or joke about memory lapses.

• Dementia-Related Memory Loss:

  • Frequently misplacing items.

  • Regularly getting lost in familiar environments.

  • Forgetting recent events entirely.

  • Changes are noticeable to family members.

  • The patient is often unaware of the cognitive deficit.

STAGES OF DEMENTIA PROGRESION

• Mild Stage:

  • Short-term memory loss.

  • Poor judgment.

  • Mild disorientation.

  • Difficulty managing work and finances.

  • Decreased ($\downarrow$) motivation.

• Moderate Stage:

  • Failure to recognize family members.

  • Agitation.

  • Significant behavioral problems.

  • Poor hygiene.

  • Difficulty planning daily life activities.

• Severe (Late) Stage:

  • Inability to speak or understand language.

  • Difficulty swallowing.

  • Immobility.

  • Incontinence.

  • Total inability to perform ADLs.

CORE FACTS AND DEMOGRAPHICS OF DEMENTIA

• Characteristics: The disease is chronic, progressive, irreversible, and degenerative in nature.

• Prevalence:

  • Affects $5\%$ of individuals aged $65\text{–}74$.

  • Affects approximately ($\sim$) $50\%$ of individuals over the age of $85$.

• Prognosis: Death typically occurs $4\text{–}6$ years after the initial diagnosis.

• Epidemiology: More common in women.

• Impact: Creates a massive caregiver burden.

ALZHEIMER’S DISEASE (AD): PATHOPHYSIOLOGY AND WARNING SIGNS

• Pathophysiology:

  • Accumulation of Beta-amyloid plaques.

  • General brain degeneration.

  • Dysfunction of synapses.

• Early Warning Signs (NCLEX Priority):

  • Memory loss that impacts work performance.

  • Difficulty performing common, familiar tasks.

  • Language problems.

  • Disorientation regarding time and place.

  • Poor judgment.

  • Changes in mood or personality.

DIAGNOSTIC EVALUATION FOR DEMENTIA AND AD

• Primary Protocol: Always rule out reversible causes first.

• Laboratory Screening:

  • Complete Blood Count (CBC)

  • Electrolytes

  • Blood Urea Nitrogen (BUN) and Creatinine

  • Thyroid function tests

  • Liver function tests

  • Vitamin levels: $B_1$, $B_6$, and $B_{12}$.

• Assessment and Imaging:

  • Mini-Mental Status Exam (MMSE)

  • Depression screening

  • CT or MRI scans to identify lesions or structural changes.

INTERPROFESSIONAL CARE AND PHARMACOTHERAPY

• Non-Pharmacological Support: Functional support, exercise, music therapy, and caregiver support.

• Pharmacological Management for Behavioral Issues:

  • Antipsychotics: Haloperidol, Risperidone, Olanzapine, Quetiapine, Aripiprazole.

  • Benzodiazepines: Lorazepam.

  • Sleep Aids: Zolpidem.

• Core Disease Treatment:

  • Cholinesterase inhibitors: Used to increase ($\uparrow$) levels of acetylcholine in the brain.

NURSING ASSESSMENT AND DIAGNOSIS

• Assessment:

  • Subjective Data: Evaluate functional health patterns.

  • Objective Data: Conduct general and neurological examinations.

• Common Nursing Diagnoses:

  • Impaired memory

  • Self-care deficit

  • Risk for injury

  • Wandering

NURSING GOALS AND PRIORITIES

• Major Goals:

  • Maintain cognitive function for as long as possible.

  • Ensure patient safety.

  • Promote independence.

  • Reduce anxiety.

  • Improve nutritional status.

  • Balance rest and physical activity.

  • Improve communication effectiveness.

• Clinical Priorities: Safety, behavior management, pain management, nutrition/swallowing monitoring, oral care, infection prevention, skin care, elimination management, and caregiver support.

COMMUNICATION STRATEGIES (NCLEX GOLD)

• Recommended Actions (DO):

  • Treat patients with the respect due to adults.

  • Maintain eye contact and use gentle touch.

  • Give simple, one-step instructions.

  • Maintain patience.

  • Use distraction and redirection techniques.

  • Provide constant reassurance.

• Actions to Avoid (DO NOT):

  • Do not argue with or correct the patient.

  • Do not rush the individual.

  • Do not force activities.

  • Do not talk about the patient as if they are not there.

  • Do not use pet names like "honey."

  • Do not take aggressive or negative behavior personally.

BEHAVIORAL AND ENVIRONMENTAL MANAGEMENT

• Behavioral Strategy: Assess for physical causes (e.g., pain, hunger, full bladder) FIRST. Check for environmental triggers. Avoid "why" questions. Use repetition and distraction.

• Sundowning: Defined as increased agitation in the evening hours.

  • Interventions: Assess the underlying cause, review medications, increase exposure to daylight during the day, and limit naps and caffeine intake.

FAMILY AND CAREGIVER TEACHING BY DISEASE STAGE

• Mild Stage: Advise the family to have the patient stop driving, encourage physical and social activity, provide environmental cues, and avoid arguments.

• Moderate Stage: Implement locks for safety, provide incontinence care, and label the environment clearly.

• Severe Stage: Establish a strict toileting schedule, prioritize oral and skin care, monitor nutrition closely, and begin considering long-term care facilities.

RESEARCH TRENDS IN COGNITIVE IMPAIRMENT

Research is currently focused on:

• Targeting Beta-amyloid plaques.

• Developing monoclonal antibodies.

• Utilizing drugs to restore synapse function.

• Enzyme blockers known as secretase inhibitors.

END-STAGE CARE AND HOSPICE

Care focus shifts to comfort and maintenance:

• Nutrition

• Oral care

• Infection prevention

• Skin integrity

• Elimination assistance

• Pain control

• Safety preservation

• Engagement with hospice services

DELIRIUM: ACUTE COGNITIVE IMPAIRMENT

• Definition: An acute, temporary state of confusion that is often reversible. It has a sudden onset and is common in hospitalized elderly patients.

• Clinical Features: Short attention span and disorganized thinking.

• Causes: Medications, illness, infection, surgery, and pain.

• CAM Assessment Tool (Confusion Assessment Method): Diagnosis requires:

  1. Acute onset and fluctuating course

  2. Inattention

  3. Disorganized thinking

  4. Altered Level of Consciousness (LOC)

• Prevention and Management: Monitor behavior, control pain, reduce unnecessary medications, improve communication, and identify/treat the underlying cause using labs (CBC, electrolytes).

DEPRESSION IN THE ELDERLY

• Statistics: Affects $15\%$ of older adults and up to $30\%$ of those in nursing homes.

• Risk: Presents a high risk for suicide.

• Causes: Major life events, chronic illness, and substance use.

• Symptoms: Sadness, changes in appetite or sleep, decreased ($\downarrow$) attention, and loss of interest.

• Assessment Tools: Mini-Mental Status Exam (MMSE) and the Geriatric Depression Scale.

NCLEX-STYLE KEY POINTS AND HIGH-YIELD PEARLS

• Early Sign of AD: Getting lost in a familiar place.

• Best Nursing Intervention: Providing simple, one-step instructions.

• Dementia Diagnosis Elements: Includes clinical history, neurological exam, CT/MRI, and MMSE.

• Essential Pearls:

  • Dementia is NOT normal aging.

  • Alzheimer’s is the most common cause of dementia.

  • Delirium is characterized as acute and reversible.

  • Depression in the elderly can often mimic dementia symptoms.

  • A nursing priority is to ALWAYS rule out reversible causes first.

  • Safety is the #1 priority for patients with cognitive impairment.

  • Communication style is a heavily tested topic on nursing exams.