TBI Flashcards

1
Q

What are the levels of injury on the glascow coma scale?

A
  • Mild injury = 13-15 pts
  • Mod injury= 9-12 pts
  • Severe = less than 9
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2
Q

What factor influences outcome?

A

Pre morbid state (decreased outcomes associated with previoius injury)

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3
Q

What are the types of of Primary injury?

A
  • Local
  • Coup-countercoup
  • Polar damage
  • Diffuse axonal injury
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4
Q

What are the types of local injury?

A
  • Laceration
  • Clot
  • Contusion
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5
Q

What is coup-countercoup?

A

Blow to the skull on one side that causes brain to shift and be damaged on the opposite side:

  • Skull pushes brain at same time as it accelerates
  • on the opposited side there is momentary vacuum
  • When skull stops accelerating vacuum collapses and brain hits skull
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6
Q

What is polar damage?

A

Result of an accel/decel injury and most commonly hits the frontal and temporal poles. Ocassionally occipital

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7
Q

What is damamged in DAI? and what are the levels of severity?

A
  • Widely scattered shearing damage to axons
  • Severity:
    • Mild: little defecit
    • Mod: wider areal of subcortical matter
    • Severe: extends down and in to midbrain and brainstem (coma with posturing and autonomic dysfuntion
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8
Q

What are types of secondary injury?

A
  • Hypoxemic Ischemic Injury-Brain tissue shifted as a result of swelling
  • Intractranial hematoma- forms post injury due to cont. bleeding
  • Increased ICP (normal <10 mmHg)
  • Autodestructive Cellular phenomena (Cell suicide)
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9
Q

What is arterial hypoxemia?

A

A form of HII that results in much wider damage from anything shutting off O2 in the brain (MI, airway obstruction, arrythmia, PE)

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10
Q

What are the 2 scenarios for intracranial hematoma?

A
  • “Talk and Die”- pt has as period of lucidity then loses consciousness and ultimately dies (due to space occupying lesion)
  • Person in coma and has no lucid period-bleeding can go undetected which results in death
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11
Q

what are the 3 types of brain herniations?

A

Uncal, Central, Tonsillar

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12
Q

Characteristics of Uncal herniation

A
  • Location: Tentorial notch, midbrain
  • Cause: mass lesion in temporal lobe or middle fossa
  • Structures involved: Hippocampal gyrus and uncus, occulomotor nerve, cerebral peduncle, midbrain ascending reticular activating system, PCA
  • Clinical effects: Paresis of nerve 3, hemiparesis, coma, homonymous hemianopsia
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13
Q

Characteristics of Central herniations

A
  • Location: same as uncal
  • Cause: mass lesion in frontal, paretiel, or occipital lobe; progression of uncal
  • Structures involved: midbrain, pons (causes decerebate rigidity); ascend. retic. activat. syst (coma)
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14
Q

Characterstics of Tonsillar:

A
  • Location: Foramen magnum, medulla
  • Cause: mass lesion in posterior fossa, Progression of central herniation
  • Structures involved: Cerebellar tonsils (neck pain and stiffnes), Indirect activation pathways (flaccidity), ascend retic. activat. syst (coma), Vasomotor centers (alters pulse, BP, respiration)
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15
Q

What is ACP? How is it treated?

A

Increase in excitatory neurotransmitters (glutamate) due to activation of calcium dependant enzymes that destroy more tissue. Treat: cooling; hyperbaric O2, free radical scavengers

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16
Q

How is a TBI medically managed?

A
  • Monitor TBI
  • check values (>25 mmHg usually requires intervention; <20 for 24 hrs discont. monitoring)
  • Prevent increasing ICP (avoid dependent posns)
  • Meds (check interaction with therapy)
    • can increase spasticity and decrease patient willingness to particpate
17
Q

What are impairments associated with TBI?

A
  • Cognitive Deficits
  • neuromusclar deficits
  • Visual deficits
  • Perceptual Deficits
  • Swallowing deficits
  • Behavioral Disinhibition
  • Commuincation Deficits
  • Cognitive impairments
  • Behavioral Impairments
18
Q

What constitutes a coma?

A

8 or lower on GCS. (if can open eyes and has sleep wake cycles, but cannot obey commands = vegetative)

19
Q

What is post traumatic amnesia?

A

Time between injury and when patient begins to remember ongoing events

20
Q

What are behavioral deficits?

A

Sexual disinhibition, emotional disinhibition, aggressive disinhibition, apathy, depression, low tolerances for frustration

Remember that behavior problems are a result of damage, not personal

21
Q

What are indirect impairments?

A
  • contractures (hand, wrist,PF)
  • decreased endurance
  • DVTs
  • Mobility deficits
  • Pneumonia
  • Heterotopic ossification (development of bone tissue within soft tissue of unknow cause), confirmed by x-ray; typically in elbow or hip flexors; avoid agressive stretching)
22
Q

What are major areas requiring intervention?

A
  • Increase level of consciousness
  • Avoid seconday impairments
  • Posturing and tone issues
  • Maintaining joint integrity
  • Increasing intolerance of positions and activities
  • Family education
23
Q

What is the purpose of sensory stimulation?

A

To increase the LOC through multi-system sensory input in the RAS

24
Q

What are purposes of positioning?

A
  • Decrease posturing and thereby possibly reduce ICP
  • Decrease tone
  • Reduce risk of contractures
  • Prevent skin breakdown
25
What are major areas of concerns for contractures?
* Ankles (PF) * Toes (flexor tone) * Elbows, wrist fingers
26
What is a contraindication for ROM of TBI pts?
DVTs
27
What are Levels I and II of RLA? How does PT interact?
Level 1 = no response; Level 2= generalized response * Talk to patient in a normal conversational manner (hearing is the first to come back; don't talk about medical condition in the room) * Provide appropriate stimulation (Alternate periods of time with noise for about 15 minutes) * Change pts position
28
what is level III? How do you interact?
Level 3 =Localized response * Continue in normal conversation tones. Talk about their interests * Use simple 1-part directions. Use 1 or 2 short sentences * Reallize attention span is very short * Encourage verbalizing (except if on vent) * Provide orientation for the patient * Remember rest periods * Don't expet pt to remember recent events * Provide visual helps
29
what is level IV? how do you interact?
Level 4 = confused/agitated * Remember agitation is not personal (major concern is pt safety: avoid contacts to which pt responds negatively, don't react with anger, don't stay alone with pt if you feel uncomfortable, produce a calm environment, pt will not remember the way they acted) * short, simple directions. allow for delayed responses. talk slow * Don't expect pt to remember instructions (attention span \< 2 min) * Provide orienting information frequently * Prepare pt for tasks * pick tasks pt can complete * Treat pt as adult
30
What is level V? how to interact?
Level 5 = confused/inappropriate/nonagitated * pt will perform automatic tasks but supervised * pt still in PTA and can't remember recent events and attention span is 2-3 min for single task. provide ways to support memory * Use gentle cues to orient patient * one-step directions, simple words * attention span is 20-30 min for varied tasks * agitation is caused by too much pressure placed on them * if pt becomes agitated: rest period, change task, calmly ask pt to relax
31
What is level VI? how to interact?
Level 6 = confused/ appropriate * pt not fully out of PTA, but beginning to remember some new information. recall of past is shallow and inconsistent ( can reduce cueing and start a journal) * 2-step directions and normal language (be concrete and specific; don't use sarcasm or humor- they won't get it) * pt needs a lot emotional support * pt can take responsiblity for perfomance of basic daily tasks w/o supv * pt may acknowledge his or her physical and memory impairments
32
What is level VII? how to interact?
Level VII = automatic/appropriate * normal conversation; 2-3 step directions * pt will literally interpret what you say (won't get subtle humor) * Expect general day-to day carryover (frequently discuss events to encourage recall; pt can use a memory notebook) * Encourage pt to resume responsiblity for daily routine (ADLs, getting to and from therapy sessions) * Expect denial of future implications of disablilites (pt will feel normal) * Design tasks or situations so that pt can control emotional expression (Behav. Mod)
33
What is level VIII? how to interact?
Level VII= purposeful/appropriate * use normal conversation, complex commands * pt will still take things literally, but will understand with explanation * detailed carryover of daily events (pt should continue to use notebook; memory deficits may be permanent) * pt will carry out daily responsiblities independently * pt will make long range plans and goals * will incorporate present physical and mental abilities and limitations in future planning * pt and staff should engage in mutual planning. consider pt premorbid state * pt tolerance for frustration increased (emotional control still not as good as before, help pt avoid situations that cause anger and stress)