TBI #2 Flashcards
Normal ICP
5-10 mmHg
Abnormal ICP
greater than 20 mmHg
What activities can increase ICP?
Cervical flexion, percussion & vibration, coughing
Signs and symptoms of ICP:
Decreased responsiveness, impaired consciousness, severe HA, vomiting, irritability, papilledema, ↑d BP & ↓d HR
How much oxygen does the brain demand?
20% of body’s oxygen
Areas vulnerable to lack of oxygen
Hippocampus (Memory storage area)
Cerebellum
Basal Ganglia
Seizure:
discrete clinical event reflecting temporary, physiologic brain dysfunction, characterized by excessive hypersynchronous cortical neuron discharge
Events that trigger seizures:
Stress, poor nutrition, electrolyte imbalances, missed mediations or drug use, flickering lights, infection, fever, worry, and fear
GCS mild:
13-15
GCS moderate:
9-12
GCS severe:
less than 8
Stage 1 of Recovery Stages from Diffuse Axonal Injury
coma
Stage 2 Recovery Stages from Diffuse Axonal Injury
Unresponsive Vigilance/vegetative state
Stage 3 Recovery Stages from Diffuse Axonal Injury
Mute responsiveness/minimally responsive (pt. is not vegetative and DOES show signs, even if intermittent, of fluctuating awareness
Stage 4 Recovery Stages from Diffuse Axonal Injury
Confusional State (disturbance of attention mechanisms; all cognitive operations are affected, patient is unable to perform new memories. Can have hyper/hypo arousal)
Stage 5 Recovery Stages from Diffuse Axonal Injury
Emerging Independence (confusion is clearing and some memory possible, significant cognitive problems and limited insight, socially uninhibited)
Stage 6 Recovery Stages from Diffuse Axonal Injury
Intellectual/Social Competence (increasing independence, although cognitive difficulties (problem solving, reasoning) persist along with behavioral and social problems)
Stage 7 Recovery Stages from Diffuse Axonal Injury
Patient can plateau at any stage or regress under conditions of stress or repetitive brain injury
What does Glascow Coma Scale measure?
Pupillary response
Motor activity
Ability to verbalize
Arousal
Primitive state of being awake or alert
Reticular activating system is responsible for level of arousal
Awareness
Conscious of internal & external environmental stimuli
Consciousness
State of being aware
Coma
State of decreased level of awareness; Usually not > 3 weeks
State of unconsciousness in which the patient is neither aroused nor responsive to the internal or external environments (Rappaport et al., 1992)
Eyes are closed
Unable to initiate voluntary activity
Sleep & wake cycles cannot be distinguished on EEG
Vegetative State
Return of brainstem reflexes, sleep-wake cycles but remains unconscious
May experience periods of arousal & spontaneous eye opening without tracking
Persistent Vegetative State
A vegetative state for a year or longer
Stupor
Condition of general unresponsiveness
Obtundity
Occurs in individuals who sleep a great deal of time
Delrium
Characterized by disorientation, fear, and misperception of sensory stimuli
Clouding of Consciousness
State of being confused, distracted and having poor memory
LOCF I
No Response
deep sleep, unresponsive to any stimuli
LOCF II
Generalized Response
patient reacts inconsistently and nonpurposefully to stimuli in a nonspecific manner. Response may be physiological changes, gross body movements and or vocalization
LOCF III
Localized Response
patient reacts specifically but inconsistently to stimuli. Responses are directly related to type of stimuli. May follow commands (closing eyes) in an inconsistent, delayed manner
LOCF IV
Confused-Agitated
heightened state of activity. behavior is bizarre and nonpurposeful. Does not discriminate among persons or objects; unable to cooperate directly with treatment efforts. Verbilizations are incoherent/inappropriate. Confabulation maybe present. Lacks short term and long term recall. Gross attention brief, selective attention nonexistent
LOCF V
Confused-Inappropriate
able to respond to simple commands consistently; increased complexity of commands responses nonpurposeful, random. Gross attention highly distractable, lacks ability to focus on a specific task. Maybe able to converse on social level for short periods of time. Verbalization often confused and confabulatory. Memory impaired.Unable to learn new information
LOCF VI
Confused-Appropriate
shows goal oriented behavorior but dependent on external input or direction. follows simple directions consistently and shows carry over. Responses maybe incorrect due to memory problems, but are appropriate to situation
LOCF VII
Automatic-Appropriate
Appears appropriate and oriented, goes thru daily routine automatically, but frequent robot-like. Shows minimal confusion and shall recall of activities. Carry over for new learning, but at decreased rate
LOCF VIII
Purposeful-Appropriate
able to recall and integrate past and recent events, aware and responsive to environment, shows carryover. may show decreased ability relative to premorbid abilities, abstract reasoning, tolerance for stress ad judgement in emergencies or unusual circumstances.