Sensory Alteration

II. Sensory Perception: Key Concepts

1. Signs & Symptoms of Altered Sensory Perception

  • Definition: Altered sensory perception means the brain is not receiving or interpreting sensory information correctly.

General Signs

  • Confusion

  • Disorientation

  • Difficulty following directions

  • Changes in behavior or mood

  • Poor coordination

  • Withdrawal or irritability

Vision Changes

  • Blurred vision

  • Sensitivity to light

  • Difficulty reading or recognizing faces

Hearing Changes

  • Asking for repetition

  • Turning head toward sounds

  • Speaking loudly

  • Ringing in ears (tinnitus)

Touch Changes

  • Numbness

  • Tingling

  • Decreased ability to feel temperature or pain

Smell/Taste Changes

  • Loss of appetite

  • Inability to detect spoiled food

  • Complaints that food “tastes different”

2. Sensory Deprivation vs. Sensory Overload

  • Sensory Deprivation
      - Definition: Too little sensory input; the brain is not getting enough stimulation.   - Causes:
        - Isolation
        - Bed rest
        - Vision or hearing loss
        - Lack of visitors
        - Minimal environmental stimulation
      - Symptoms:
        - Boredom
        - Depression
        - Daydreaming
        - Slow thinking
        - Hallucinations

  • Sensory Overload
      - Definition: Too much sensory input; the brain cannot process all the information.   - Causes:
        - Hospital environment (alarms, lights, staff)
        - Pain
        - Anxiety
        - Too many visitors
        - Medications
      - Symptoms:
        - Irritability
        - Restlessness
        - Trouble focusing
        - Anxiety
        - Sleep problems

3. Hazards Associated With Sensory Deficits

  • Sensory deficits increase the risk of injury, miscommunication, and poor health outcomes.

Vision Deficits

  • Falls

  • Medication errors (misreading labels)

  • Difficulty navigating environment

Hearing Deficits

  • Misunderstanding instructions

  • Social isolation

  • Safety risks (not hearing alarms or traffic)

Touch Deficits

  • Burns (not feeling heat)

  • Pressure injuries (not feeling pressure)

  • Injuries from sharp objects

Smell/Taste Deficits

  • Eating spoiled food

  • Poor nutrition

  • Not detecting smoke or gas leaks

III. Expanded ATI-Style Content

A. Definitions

  • Sensory perception: How the brain receives and interprets information from the senses.

  • Sensory deficit: Loss or impairment of one or more senses.

  • Sensory deprivation: Too little sensory input.

  • Sensory overload: Too much sensory input.

B. Defining Characteristics

  • Sensory Deficit:
      - Reduced vision, hearing, taste, smell, or touch
      - Difficulty communicating
      - Withdrawal or frustration

  • Sensory Deprivation:
      - Boredom
      - Slow thinking
      - Hallucinations
      - Depression

  • Sensory Overload:
      - Anxiety
      - Irritability
      - Poor concentration
      - Restlessness

C. Contributing / Risk Factors

  • Aging

  • Chronic illness (e.g., diabetes → neuropathy)

  • Stroke

  • Medications (e.g., sedatives, opioids)

  • Hospitalization

  • Isolation

  • Sensory impairments (e.g., blindness, deafness)

IV. Nursing Assessment

  • Nurses assess:
      - Vision, hearing, touch, taste, smell
      - Orientation (person, place, time)
      - Behavior changes
      - Communication ability
      - Home environment
      - Use of assistive devices (glasses, hearing aids)

V. Nursing Interventions

For Sensory Deprivation

  • Increase meaningful stimulation

  • Encourage visitors

  • Provide clocks, calendars, TV, music

  • Open blinds for natural light

  • Encourage conversation

  • Provide tactile stimulation (e.g., massage, objects to hold)

For Sensory Overload

  • Reduce noise and lights

  • Limit visitors

  • Provide a calm environment

  • Organize care to avoid constant interruptions

  • Speak calmly and slowly

  • Encourage rest

For Sensory Deficits

  • Vision:
      - Provide glasses
      - Ensure adequate lighting
      - Remove hazards
      - Use large-print materials

  • Hearing:
      - Provide hearing aids
      - Face the client when speaking
      - Speak clearly, not loudly
      - Reduce background noise

  • Touch:
      - Protect from extreme temperatures
      - Inspect skin daily
      - Use pressure-relieving devices

  • Smell/Taste:
      - Check food expiration dates
      - Encourage good oral hygiene
      - Use seasonings to improve taste

VI. Evaluation / Documentation

  • Nurses document:
      - Changes in sensory function
      - Client’s ability to communicate
      - Safety concerns
      - Response to interventions
      - Need for assistive devices