Chapter 1 Flashcards
Cost of BI to society ($)
$76.5 Billion (cost of care and lost productivity)
3 reason a person is at risk for developing significant disability
- awareness and understanding about brain injury remains fairly limited
- BI is frequently not identified
- treatment is not always readily available
acquired brain injury
injury to the brain that is not hereditary, congenital, degenerative, or induced by birth trauma
traumatic brain injury
alteration of brain function or other evidence of brain pathology, caused by an external force.
2 primary methods mechanisms of TBI
- impact to the head
2. inertial forces which affect the brain
2 types of traumatic impact injuries
- open (penetrating)
2. closed (non-penetrating)
Closed injury
can cause brain lacerations and contusion, or ICH
Inertial forces
non-contact/impact forces; acceleration-deceleration forces where brain is rapidly accelerated within the skull followed by rapid deceleration
results in coup-contracoup injury
phase 1 of secondary brain injury
impaired blood flow
tissue damage
metabolic imbalance
membrane permeability
phase 2 of secondary brain injury
axon terminal depolarization intracellular breakdown apoptosis release of exitatory neurotransmitters free radical generation necrosis
leading cause of traumatic brain injury
falls
how many people sustained a TBI in 2010
2.5 million
percentage of TBIs each year that are mTIBs/concussions
75%
Percentage of brain injuries each year that result in death
2% (53,000)
Percentage of brain injuries each year that result in hospitalization
11% (284,000)
Percentage of brain injuries each year that result in ED visits
87% (2,214,000)
risk factors and indicators for how a BI may affect one’s life
injury severity age at injury alcohol misuse domestic violence service in military participation in sports
risk for second brain injury after first
3 times greater
risk for 3rd brain injury after 2nd
8 times greater
age groups in which falls cause most TBIs
0-4 years
75+ years
leading cause of TBI-related death
MVC
age group in which MVCs cause highest rate of TBI
20-24 years
highest rate of TBI causes for age 0-14
Fall (50.2%)
Struck by or against (24.8%)
MVC (6.8%)
highest rate of TBI causes for age 65+
Fall (60.7%)
Unknown (24.7%)
Struck by or against (5.7%)
MVC (7.9%)
concussion
- trauma-induced alteration in mental status
- may or may not involve LOC
- can result in memory loss for events immediately before or after trauma
- can result in local neurological deficits that may or may not be transient
- may demonstrate vomiting, lethargy, dizziness, and inability to recall what just happened
percentage of sports-related mTBIs that result in LOC
8.9%
age groups most likely to sustain TBI
15-19 years
20-24 years
65+ years
age group with highest incidence of TBI-related hospitalization and death
75+ years
annual percentage of TBIs that occur in children age 0-14
30%
non-accidental trauma causes at least ___% of deaths from head trauma in children under 2 years old
80%
firearm-related TBI deaths are highest among what age groups
20-24 & 75+ years
MVC-related TBI death rates are highest among which age group?
15-24 years
fall-related TBI death rates are highest among which age group?
75+
at any age and by any cause, which gender has the highest rate of TBI-related death?
males