Traumatic Brain Injury Flashcards

1
Q

What is Primary injury

A

immediate trauma to brain and parenchyma at moment of insult or injury

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2
Q

What is secondary

A

Result of secondary effects (cascade of events after initial injury that causes damage), hypoxia/ischemia, edema, and increased ICP

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3
Q

What are the MOI for TBI

A

Contact- Open (skull penetrated) vs closed
Acceleration vs Deceleration
* compresion
* tension
*shearing

Rotation
* angular acceleration

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4
Q

What is the Pathophys of TBI

A

focal Injury
* Non penetrating (coup-countre coup) vs Penetrating (gunshot)

DAI - diffuse axonal injury
Hypoxic ischemic injury –> ocnstriction or disruption of blood vessel (essentially a stroke)
Increased ICP

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5
Q

Describe Elevated ICP

A

Normal is 5-20cmH20

  • severe raised ICP leads to brain herniation

ICP>20mmH20 = elevated
ICP>25cmH2O = Critical

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6
Q

Why may it take longer in older adults to have increased ICP

A

SENILE ATROPHY
- due to aging the size of the brain decreases, therefore there is more room in the skull
- therefore even though the ICP is rising it will take longer to reach >25cmH2O

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7
Q

What are Signs of Elevated (10)

A

-1. Decreased consciousness (stupor (almost unresponsive) and coma (complete unresponsive)

  1. altered vital signs
  2. Widened pulse pressure (difference between systolic and diastolic)
  3. Irregular brething (Cheyne-Stokes) –> breath depth increases then decreases and then stops
  4. Vommiting
  5. Headache
  6. Non-reacting pupils (CN3)
  7. Papilledema (optic disc or nerve swelling)
  8. progressive imapirment of motor fucntion
  9. Seizure activity
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8
Q

What is the Treatment for elevated ICP (4)

A
  1. Elevate head of bed 30 degrees (LOWERING BED IS CONTRAINDICATED)
    * promotes venous drainage
    *immediate relief
  2. Intubate and hyperventilate: results cerebral vasoconstriction
  3. IV mannitol - promotes cerebral drainage while maintaining perfusion to brain
  4. Ventricular draiange - CSF drainage decreases ICP
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9
Q

What happens if the primary treatments for elevated ICP fails

A
  • Barbiturate-induced coma: results in cerebral VC and decreased metabolic demand
  • Surgical decompression (hemicraniectomy)
  • Steroids
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10
Q

What are possible impairments seen in TBI

A
  1. Neuromuscular (abnormal tone)
  2. Cognitive
  3. Neurobehavioral
  4. Communication
  5. Swallowing
  6. Dysautonomia
  7. Visio-perceptual
  8. Post-traumatic seizure
  9. Secondary impairments and complications
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11
Q

What are some Neuromsucular impairments

A
  1. Paresis
  2. Abnromal tone
  3. Coordination
  4. Motor fucniton
  5. Postural control
  6. Abnormal gait
  7. Somatosensory function
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12
Q

What are cognitive impairments seen in TBI

A
  • arousal level (coma, vegetative state, min concious)
  • Attentoin
  • ocncentration
  • Memory
  • Learning
  • Executive function
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13
Q

Decribe the 3 levels of arousal state

A
  1. coma
  2. vegetative state
  3. Minimally concious state
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14
Q

Define Coma and S+S

A
  1. Arousal system not functioning
  2. eyes closed
  3. Sleep/wake cycles ABSENT**
  4. ventilator dependent**
  5. No auditory, visual, cognitive, or communicative function
  6. Abnormal motor and postural reflexes may be present (Decorticate)
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15
Q

Define Vegetative state and S+S

A
  1. eyes OPEN, but awareness is ABSENT
  2. brainstem is able to manage basic cardiac, respiratory, and other functions (patient can be weaned off ventilator)
  3. sleep/wake cycles are present **
  4. may startle to visual or auditory stimuli**
  5. MEANINGFUL motor, cognitive, or communicative function ABSENT (maybe reflexive movement but awareness is absent)
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16
Q

Define Minimally Conscious state

A
  • minimal evidence of AWARENESS
  • cognitively mediated behavior occur inconsistently (this is how we know there is awareness)
  • Sleep/wake cycles are present
  • will localize to NOXIOUS stimuli and may inconsistently reach for objects
  • May localize to sound location and demonstrate visual fixation and pursuit (follow with eye and respond to sound - so some awareness) **
17
Q

What is Stupor and obtunded

A

Stupor: Almost unresposnive state - can be aroused briefley with VIGOROUS (shake), repeated stimulation

Obtunded: Decreased alertness. Sleeps often

18
Q

Describe the 4 types of Memory impairments in TBI

A
  1. Anomia: difficulty remembering names, proper nouns, or other abstract nouns
  2. Anterograde amnesia: Not remembering anything from the injury forward
    - Likely remember info prior to injury (recognize family and friends)
  3. Retrograde amnesia: Not remembering events PRIOR to injury
    - may initially be very long, but can partially resolve
    - may never remember events leading up to injury
  4. Post-traumatic amnesia: the time between the injury and when patient is able to recall recent events
19
Q

What are neurobehavioral impairments

A
  • agitation, apathy, emotional liability, mental inflexibility (can’t change their idea), disinhibiton (lack of resentment), anxiety, aggression, impulsiveness, irritable, lack of inhibition (can’t initiate), psychotic ideation (imagine things that happened that never did), Egocentricity (can’t put themselves in other’s shoes - eveything baout tem), poor self-image, sexual apathy or disinhibiton
20
Q

What are some communication impairments

A

Aphasia, auditory processing deficits, or subtle language processing deficits

Disorganized communication, imprecise language, difficulty with word retrieval, socially inappropriate, difficulty communicating in distracting environments, no social cues or adjusting to situation

21
Q

What is Dysautonomia

A

Increased SNS activity following TBI (paroxymal sympathetic hyperactivity)

  • Results in increased HR, inc. RR, Inc BP, diaphoresis and hyperthermia
22
Q

what are visuo-perceptual impairments

A

Damage to occipital lobe can result in visual impairments
Perceptual impairments: apraxia, spatial neglect, somatognosia

23
Q

What are key areas to examine for TBI

A
  • Arousal, attention and cogntion**
  • integumentary integrity - skin (pressure sores)
  • Sensory integrity
  • Motor fucntion
  • ROM
  • Reflexes
  • Ventilation and respiration
24
Q

Describe the Glasgow Coma scale

A
  • Measures level of conciousness
  • Helps classify severity of injury (mild, moderate, severe)
  • Help track progress

3 scores
* eyes opening, motor, verbal

Total score between 3 and 15
Severe <8
Moderate 9-12
Mild>13

25
What is the Distinction between mild, moderate and severe (know Moderate anything less is mild and anything more is Severe)
GCS score Moderate: 9-12 Loss of consciousness >30mins and less than 24hrs Altered consciousness >24hrs (same as severe) Post-traumatic amnesia >1 day <7days (period of memory loss from time of trauma to recalling events) Neuroimaging: Normal or abnormal
26
What is the Rancho Los Amigos Levels of Cognitive Fucntioning (LOCF)
- Descriptive scale used to track cognitive and behavioural recovery as patient emerges from coma** - used for communciation of status and treatment planning - patient can plateau at any level
27
What are the 8 levels of Ranchos Los amigos levels of Cognitive function
1. No response: deep sleep and completely unresponsive to stim 2. Generalized response: reacts inconsistently and nonpurposefully to stimuli in a nonspecific manner 3. Localized response - patient reacts specifically but not consistently 4. Confused-agitated: heightened state of activity> behavior is bizarre and nonpurposefully relative to immediate environment 5. confused-inappropriate: able to respond to simple commands fairly consistently 6. confused appropriate: shows goal-directed behavior but is dependent on external input or direction 7. automatic appropriate: appropriate and oriented at home and hospital settings --> judgement still impaired 8. purposeful appropriate: able to recall and integrate past and recent events and aware of and responsive to environment
28
What is the Galveston Orientation and Amnesia Test
- questions include: name, city, recall of how patient is, where he or she is and day, date month year and event of injury - Helps determien outcome or prognosis
29
What is the Prognosis
Predictors of poor outcome are: - Low initial GCS score - Lower education level - Very young age (<7) and older age >40yrs - Longer periods of post-traumatic amnesia <34 days likely to have good recovery
30
What are the Interventions
- primary PT objective: prevent secondary complications (due to prolonged immobility r from TBI) --> begin mobilization when ,edically cleared - Cognitive and behavioral impairments make examination and treatment difficult --> PT must understand how to work with pts impairments PT also plays important role in patient and family education (educate transfers, about the condition, treatment, behaviors that are displayed bc of injury)
31
What are the 6 considerations for Confused and agitated Patients
1. Consistency 2. Expect NO carryover 3. Model Calm behaviour 4. Expect Egocentricity 5. Flexibility/options 6. Safety
32
Describe Consistency
- interact and address inappropriate behaviors in a consistent manner (unemotional criticism) - seen by same PT at same place and same time everyday - estabilish a routine - familiarity can be calming - HELP re-orient the pt in non-threatening manner (don't ask pt to provide orientation if they are not expected to succeed): "remember I told you we have therapy in an hour?"
33
Describe what is meant by expect no Carry over
- teaching NEW skills may be unrealistic - work near patients physical level and use familiar tasks, rater than trying to progress more challenging skills that require learning - may be able to perform automatic skills (procedural memory) - ambulation, brushing teeth - does not mean any learning took place - pictures, graphs and charts will help recaall prior days therap
34
What does it mean to model calm behavior
- PT calm and focued affect and behavior - pt lacks control of their behavior and feels unsafe - PT msut be in control pf their behavior and help model appropriate behavior
35
Define Expect Egocentricity
- may not see another point of view - pt will only think of themselves and appear selfish - AT THIS STAGE DO NOT STRESS THE PATIENT TO SEE OTHERS POV : sometimes if another patient and therapist passing the ball - our pt may grab it not thinking how the other patient might feel - instead of explaining to them that is is not okay to do that - REDIRECT their attention or ask to be included
36
Descrieb Flexibility/Options
- pt likely to have short attention span - be prepared with numerous activities that they may be directed to - treat pt at an appropriate age level - when safe - give control to patient --> allow patient to choose between therapeutic activities (do you want to bike or pass the ball aorund)
37
defien Safety
keep pt and those around them safe