Neurological dysfunction

Neurological Dysfunction Study Guide

Diagnostic Tests (Neuro)

  • CT (Non-contrast):

    • First imaging choice for stroke to differentiate between bleeding (hemorrhagic) vs ischemic stroke.

  • MRI:

    • Used for detecting structural abnormalities, tumors, and edema in the brain.

  • Lumbar Puncture (LP):

    • Analyzed for CSF to check for infections like meningitis or encephalitis, or for subarachnoid hemorrhage.

    • ⚠ IMPORTANT: Avoid LP when there is suspected ↑ICP due to the risk of herniation.

  • EEG:

    • Employed primarily for seizure classification.

  • Cerebral Angiography:

    • Assists in identifying vascular abnormalities in the brain.

Headaches

  • Definition: Pain or discomfort in the head or neck area.

Primary Headaches

  • Migraine:

    • Recurrent headaches lasting from 4 to 72 hours. Associated with changes in cerebral perfusion.

    • Triggers:

    • Head trauma

    • Caffeine intake

    • Foods containing nitrates or tyramine

    • Sensitivity to light, sound, and odor

    • Stress

    • Changes in weather

    • Skipping meals

  • Cluster Headaches:

    • Severe, unilateral pain typically behind the eye.

    • Symptoms:

    • Eyelid or facial swelling, drooping of the eye, nasal congestion.

    • Pain described as excruciating and non-fluctuating (often pacing or rocking).

    • Duration varies from 15 minutes to several hours; occurs multiple times a day.

  • Tension Headaches:

    • Mild to moderate pain occurring bilaterally, described as dull or band-like pressure.

    • Symptoms:

    • Sleep disturbances, duration from 30 minutes to 7 days.

    • Muscle tightness in the shoulder, neck, or back.

Secondary Headaches

  • Causes include:

    • Trauma

    • Infection

    • Intracranial disorders

Manifestations

  • Predominantly observed in older individuals (age > 50).

  • Abrupt onset of headaches may indicate serious underlying conditions.

Risk Factors for Serious Conditions

  • Carbon monoxide poisoning

  • Intracranial hemorrhage

  • Hypertensive emergencies

  • Encephalitis

  • Brain tumors

  • Cerebrovascular accidents (stroke)

Diagnostic Imaging

  • MRI and CT:

    • Used to assess conditions related to headaches based on clinical findings.

Nonpharmacological Headache Relief

  • Approaches include:

    • Biofeedback

    • Cognitive-behavioral therapy

    • Massage, yoga, acupuncture

    • Adequate hydration

Treatment Recommendations

  • Underlying Condition Treatment:

    • Focus on addressing any underlying medical conditions contributing to headaches.

  • Mild to Moderate Headaches:

    • Over-the-counter medications like acetaminophen or NSAIDs (e.g., ibuprofen).

  • Migraines or Cluster Headaches:

    • Prescribing triptans such as sumatriptan, rizatriptan, or zolmitriptan.

Nursing Role in Headache Management

  • Identify common headache triggers (e.g., cheese, nitrites).

  • Implement effective pain management strategies.

  • Provide a dark, quiet environment during migraines. Safety considerations include:

    • Ensuring a safe and comfortable place for the patient to rest.

    • Educating clients regarding medication safety, particularly with triptans due to possible side effects (chest tightness, dizziness) and interactions with other serotonergic drugs which can increase the risk of serotonin syndrome.

    • Caution against using opioids and barbiturates due to associations with medication overuse headaches and risk of dependence, which can exacerbate the situation over time.

Impact of Headaches on the Neurological System

  • Headaches can have profound effects on the neurological system, impacting the patient's quality of life.

Head Injury / Traumatic Brain Injury (TBI)

Expected Findings

  • Loss of consciousness (LOC) (note duration).

  • Amnesia (memory loss).

  • Confusion and dizziness.

  • Difficulty concentrating.

  • CSF rhinorrhea or otorrhea (leaking of cerebrospinal fluid).

  • Signs indicative of ↑ ICP.

Medications for TBI

  • Mannitol:

    • An osmotic diuretic used to reduce ↑ ICP.

  • Phenytoin:

    • Anticonvulsant medication often used post-TBI.

  • Barbiturates and Opioids:

    • These may also be utilized but require careful monitoring.

Nursing Priorities in TBI

  • Prioritize airway, breathing, and circulation (ABC).

  • Monitoring neurological status using the Glasgow Coma Scale (GCS).

  • Continuous monitoring of ICP for signs of worsening (e.g., headache, confusion, pupillary changes).

  • Prevent complications related to immobility.

  • Report any CSF leakage promptly.

Parkinson’s Disease

Overview

  • Considered an autoimmune condition?

    • ❌ Incorrect, it is categorized as a neurodegenerative disorder with a progressive loss of dopamine-producing neurons in the substantia nigra.

Key Findings

  • Classic Symptoms:

    • Tremor

    • Rigidity

    • Shuffling gait

    • Mask-like face (facial masking)

    • Dysphagia (difficulty swallowing).

Medications

  • Levodopa:

    • Common first-line medication for Parkinson's Disease.

  • Bromocriptine and Benztropine:

    • Other adjunctive medications to manage symptoms.

Monitoring for Complications

  • Important Monitoring:

    • "Wearing off" phenomenon, indicating the medication's effect is diminishing.

    • Orthostatic hypotension (sudden drop in blood pressure when standing).

    • Psychological effects, such as hallucinations.

Complications Related to Parkinson’s Disease

  • Aspiration Pneumonia:

    • Due to dysphagia.

  • Cognitive Decline:

    • Progressive cognitive impairment may occur over time.

Alzheimer’s Disease

Overview

  • Recognized as a progressive and irreversible form of dementia.

Risk Factors for Development

  • Advanced age

  • Family history of Alzheimer’s or other dementias.

  • Gender-related risks, with females being at greater risk.

  • African American or Hispanic ethnicity may be at increased risk.

Nursing Priorities

  1. Safety: Address wandering risk through environmental modifications.

  2. Provide simple and clear instructions for tasks.

  3. Establish and maintain a consistent daily routine.

  4. Gently reorient the patient to person, place, and time as needed.

Medications

  • Donepezil:

    • Used to manage symptoms and improve cognitive function.

Advanced Stage Care

  • Nursing Interventions:

    • Turn patients every 2 hours to prevent pressure ulcers.

    • Implement aspiration precautions due to swallowing difficulties.

    • Support for range of motion (ROM) exercises.

Multiple Sclerosis (MS)

Overview

  • Classified as an autoimmune future characterized by demyelination of the central nervous system (CNS).

Key Findings

  • Fatigue, often reported as the most common symptom.

  • Vision changes including optic neuritis.

  • Ataxia (loss of control of body movements).

  • Heat intolerance which can exacerbate symptoms.

Nursing Care Considerations

  • Energy Conservation Strategies:

    • Help patients manage fatigue effectively.

  • Avoidance of Heat:

    • Instruction for patients to stay cool, as heat can worsen symptoms.

Medications

  • Steroids:

    • Administered during exacerbations of MS symptoms to reduce inflammation.

Myasthenia Gravis

Overview

  • An autoimmune disorder characterized by a decrease in acetylcholine receptors at the neuromuscular junction.

Key Findings

  • Classic Symptoms:

    • Ptosis (drooping eyelids)

    • Diplopia (double vision)

    • Dysphagia (difficulty swallowing).

Crisis Types

  • Myasthenic Crisis:

    • Insufficient medication leads to severe muscle weakness.

  • Cholinergic Crisis:

    • Excessive medication results in increased secretions and severe muscle weakness.

Guillain-Barré Syndrome

Overview

  • Characterized by acute, ascending paralysis.

Key Findings

  • Key Symptoms:

    • Symmetrical weakness, often beginning in the lower extremities.

    • Hyporeflexia (decreased reflexes).

Priority Actions

  • Respiratory Monitoring:

    • Continuous monitoring of vital capacity is critical; be prepared for possible intubation due to respiratory failure.

Seizures

Types of Seizures

  • Generalized Seizures: Affect both hemispheres of the brain.

  • Focal Seizures: Starting in one area of the brain.

  • Unknown Types: Seizures that do not fit clear classifications.

Tonic-Clonic Seizures (formerly Grand Mal)

  • Characterized by:

    • Initial stiffening (tonic phase) followed by jerking movements (clonic phase).

    • Postictal confusion following the seizure phase.

Nursing Care Guidelines

  • Before Seizures:

    • Implement seizure precautions, install padded rails, and have oxygen & suction equipment available.

  • During Seizures:

    • Do NOT restrain the patient.

    • Do NOT put anything in their mouth.

    • Turn the patient onto their side to prevent aspiration.

    • Time the length of the seizure for documentation.

  • After Seizures:

    • Position the patient in a side-lying position for recovery.

    • Assess level of consciousness (LOC) post-seizure.

    • Document seizure events thoroughly for clinical records.

Status Epilepticus

  • Defined as seizures lasting ≥ 30 minutes or continuous seizure activity without recovery between seizures.

  • Emergency Situation: Requires immediate medical intervention.

Meningitis

Definition

  • Inflammation of the meninges, the protective membranes covering the brain and spinal cord.

Classic Signs and Symptoms

  • Fever

  • Stiff neck (nuchal rigidity)

  • Photophobia (sensitivity to light)

  • Positive Kernig’s and Brudzinski’s signs, which indicate meningeal irritation.

Treatment Considerations

  • Immediate IV Antibiotics: Administered as soon as meningitis is suspected.

  • Corticosteroids to reduce inflammation if indicated.

  • Antipyretics:

    • Administered for fever management, but avoid delaying antibiotic therapy for an LP.

Stroke (Cerebrovascular Accident - CVA)

Types of Stroke

  • Ischemic Stroke: Caused by a blockage of blood flow.

  • Hemorrhagic Stroke: Caused by bleeding in the brain.

Detection (FAST):

  • F: Face drooping.

  • A: Arm weakness.

  • S: Speech difficulty.

  • T: Time to call 911.

Nursing Priorities for Stroke

  • Continuous monitoring of the airway due to aspiration risk.

  • Monitor blood glucose levels, especially post-ischemic attack, as fluctuations can affect recovery.

  • Cardiac monitoring to identify potential risks (e.g., atrial fibrillation).

Increased Intracranial Pressure (ICP)

Description

  • A life-threatening emergency condition.

Early Signs of Increased ICP

  • Headache

  • Restlessness

  • Vomiting

  • Changes in pupil size or responsiveness.

Late Signs (Cushing’s Triad)

  • Increased Blood Pressure: Hypertension due to brain stress.

  • Decreased Pulse: Bradycardia as part of the response to ICP.

  • Irregular Respirations: Altered breathing patterns due to brain pressure.

Nursing Interventions for Managing Increased ICP

  • Positioning: Keep head of bed (HOB) at 30° to promote venous drainage.

  • Maintain a neutral neck position to avoid obstruction.

  • Administer Mannitol to manage ICP levels effectively.

  • Avoid actions that could increase ICP, such as the Valsalva maneuver, and control patient fever to minimize metabolic stress.

Potential Complications from Increased ICP

  • Brain herniation.

  • Syndrome of inappropriate antidiuretic hormone secretion (SIADH).

  • Diabetes insipidus due to interruptions in hormonal control of fluid balance.

Spinal Cord Injury

Classification

  • Complete Spinal Cord Injury: Total loss of motor and sensory function below the injury level.

  • Incomplete Spinal Cord Injury: Preservation of some motor or sensory function.

Potential Complications

  • Spinal Shock: Temporary loss of reflex function below the site of injury.

  • Neurogenic Shock: Loss of autonomic regulation, causing hypotension and bradycardia.

  • Autonomic Dysreflexia: Especially relevant for injuries at T6 or above, characterized by severe hypertension.

Immediate Actions for Autonomic Dysreflexia

  1. Sit the patient upright to lower blood pressure.

  2. Remove any triggering stimuli, such as emptying the bladder, which often exacerbates the condition.

Glasgow Coma Scale (GCS)

Scoring System

  • Scores range from 3 to 15.

    • 15: Fully alert.

    • 3: Deep coma or unresponsive.

Assessment Components

  • Eye Opening Response: Response to stimuli.

  • Verbal Response: Coherence and content of speech.

  • Motor Response: Ability to follow commands or respond to stimuli.

High-Yield Priority Reminders

  • Always prioritize Airway management first in all neurological situations.

  • Safety precautions are critical in patients with dementia to prevent wandering and risk of injury.

  • Regular monitoring of swallowing ability is important for