Download - HEAD INJURY
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HEAD INJURYHEAD INJURY Thomas M. Howard, MDThomas M. Howard, MD
Sports Medicine Sports Medicine
HEAD INJURYHEAD INJURY Thomas M. Howard, MDThomas M. Howard, MD
Sports Medicine Sports Medicine
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ObjectivesObjectivesObjectivesObjectives
1. To understand the epidemiology and classification of closed head injuries in athletes.
2. To understand the field-side and clinical evaluation and management of the athlete with a closed head injury.
3. To gain a basic understanding of the return to play recommendations and the controversy over this issue.
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Definition #1Definition #1 Definition #1Definition #1 ...“a clinical syndrome characterized by immediate and transient post-traumatic impairment of neural functions, such as
alteration of consciousness, disturbance of vision, equilibrium, etc. due to brain stem
involvement” or
traumatically altered mental status
Committee of Head Injury Nomenclature of the Congress of Neurologic Surgeons
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Definition #2Definition #2Definition #2Definition #2
…a complex pathophysiological process affecting the brain, induced by traumatic biomechanical force…from direct blow or transmitted force…with rapid onset of short-lived impairment of neurologic function that resolves spontaneously
1st International Conference on Concussion in Sports
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EpidemiologyEpidemiologyEpidemiologyEpidemiology
1 mil traumatic brain injuries per yr in US
Incidence=100:100,000 50,000 deaths M:F 2:1 Bimodal peak
15-24 & >75
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EpidemiologyEpidemiologyEpidemiologyEpidemiology
250,000 concussions/yr in contact sports
50-80% minor head injuries
1.5 mil HS football players/yr
1 in 5 HS football players
8 deaths/yr in football
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High Risk Team Sports High Risk Team Sports High Risk Team Sports High Risk Team Sports
Football/Rugby Gymnastics Hockey Wrestling Lacrosse Equestrian Sports Martial Arts
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High Risk Recreational SportsHigh Risk Recreational SportsHigh Risk Recreational SportsHigh Risk Recreational Sports
Skiing Cycling Auto racing Sport diving Playground
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Closed Head InjuryClosed Head InjuryClosed Head InjuryClosed Head Injury
Concussion Subarachnoid
Hemorrhage Subdural/Epidural
Hematoma Contusion Reactive Hyperemia Diffuse Swelling
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Glascow Coma ScaleGlascow Coma ScaleGlascow Coma ScaleGlascow Coma Scale
Motor Verbal Eye Opening
Obeys 6
Localizes 5
Withdraws 4
Flexion 3
Extends 2
None 1
Oriented 5
Confused 4
Inappropriate words 3
Incomprehensible sounds 2
None 1
Spontaneous 4
To speech 3
To pain 2
None 1
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Glascow Coma ScaleGlascow Coma ScaleGlascow Coma ScaleGlascow Coma Scale
Scaled 3-15 13-15 MBI
(Minimal Brain Injury)
9-12 Moderate Injury
<8 Severe Injury
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Minimal Brain InjuryMinimal Brain InjuryMinimal Brain InjuryMinimal Brain Injury
50% - 80% of head injuries
LOC 0- 20 minutes GCS > 13 Normal neurologic
exam PTA < 48 hours
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Histology of DamageHistology of DamageHistology of DamageHistology of Damage
Traction and shearing of axons
Microinfarcts Edema Scar formation Local metabolic
dysfunction Glycolysis and abn blood
flow
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PresentationPresentationPresentationPresentation Loss of
Consciousness (LOC) Altered
Consciousness (Dinged)
Amnesia Retrograde Post traumatic (PTA)
Disorientation Sleepiness
Abnormal coordination/balance
Abnormal reaction time
Poor concentration & comprehension
Opposition or other behavior change
Diplopia Incontinence
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On Field ObservationsOn Field ObservationsOn Field ObservationsOn Field Observations
Vacant stare In coordination Poor performance Wrong huddle Distracted Inappropriate behavior Slurred speech
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Tran sp ort
C P R /A irw ay/IV
C -sp in e
C a ll fo r h e lp
N ot B rea th in g
Tran sp ort
N eu ro E xam
C -sp in e
C a ll fo r H e lp
B rea th in g
U n con sc iou s
Tran sp ort if. .A b n exam or
S evere m ech an ism
O b serve
R em ove from fie ld
N eu ro E xam
C on sc iou s
D ete rm in e leve l o f con sc iou n ess
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Immediate TransportImmediate TransportImmediate TransportImmediate Transport
Diplopia Severe or
increasing emesis Seizure Focal neurologic
findings Pupillary changes
Rapidly progressive headache Penetrating injury
LOC > 5 min Confusion > 30 min High risk patient > 1 concussion this
season
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Sideline EvaluationSideline EvaluationSideline EvaluationSideline Evaluation
Maddocks Questions
SAC
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Maddocks QuestionsMaddocks QuestionsMaddocks QuestionsMaddocks Questions
What field are we at? What team are we playing? What period is it? How far into the period is it? Who scored last? Who did we play last week? Did we win last week?
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SACSACSACSAC
Standardized Assessment of Concussion
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Balance Error Scoring SystemBalance Error Scoring SystemBalance Error Scoring SystemBalance Error Scoring System
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Application of BESSApplication of BESSApplication of BESSApplication of BESS
Learning effect does exist (Valovich McLeod et al. Clin J Sport Med. In Press)
Practice effect does exist. (Valovich McLeod et al. Clin J Sport Med. In Press)
More difficult tasks (tandem or single foot) show greater effect.
Fatigue from exercise can decrease performance so test should be postponed until 20 minutes of rest. (Susco, Valovich McLeod, et al JAT 39:241-46, 2004)
Adult studies show can differentiate concussed and non-concussed athletes
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GRADINGGRADINGGRADINGGRADING
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Grading (Cantu)Grading (Cantu)Grading (Cantu)Grading (Cantu)
Mild
Grade I
Moderate
Grade II
Severe
Grade III
No LOC LOC < 5 min LOC > 5 min
PTA <1hr PTA 1-24 hrs PTA > 24 hrs
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Grading (Colorado)Grading (Colorado)Grading (Colorado)Grading (Colorado)
Grade I Grade II Grade III
Confusion + +
Amnesia none +
LOC none none +
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American Academy of NeurologyAmerican Academy of NeurologyAmerican Academy of NeurologyAmerican Academy of Neurology
Grade I Grade II Grade IIIa Grade IIIb
Transient Confusion
No LOC
Resolve <15 min
Transient Confusion
No LOC
Sx > 15 min
LOC
<15 min
LOC
>15 min
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Is LOC Important?Is LOC Important?Is LOC Important?Is LOC Important?
Neuropsychological testing on 383 pts over 5 yrs with MBI
LOC, no LOC or uncertain
No relationship between LOC and neurological sequelae as evidence by testing
Clin J Sport Med 1999; 9:193
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“On Field Predictors of Neuropsychological and Symptom Deficit Following Sport-related Concussion”
Cl J of Sport Med 13:222-229, 2003
Short term follow up of 78 concussed athletes
Amnesia and not LOC more predictive of deficits 2 days post injury
? Importance of duration of LOC
Duration of LOC
LOC=15/78 or 19%
7 < 30 seconds
4 30-60 seconds
3 1-2 minutes
1 > 2 minutes
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Who to Scan?Who to Scan?Who to Scan?Who to Scan?
GCS < 15 Abnormal MSE ? Any LOC Focal neurologic
findings
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Canadian CT Head RuleCanadian CT Head RuleCanadian CT Head RuleCanadian CT Head Rule
High risk (for neurologic intervention) GCS < 15 2 hrs p
injury Open/depressed
skull fx Sign of basilar fx Vomit >2 Age>65
Med risk (for brain injury) Amnesia > 30 min Dangerous
mechanism
Lancet May 5, 2001;357:1391
2078 CT’s performed over 3 years
348 abn
320/348 identified by applying these rules
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CTCTCTCT
More useful in the acute setting for significant injury SDH/EDH/SAH
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MRIMRIMRIMRI
75% abnormal within days Most findings resolve in 3
months May help predict clinical
course Abnormal findings may not
correlate with neuropsychiatric findings
Unknown long term issues
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Consider MRI for…Consider MRI for…Consider MRI for…Consider MRI for…
Prolonged post-concussive symptoms
Marked or persistent neuropsychiatric problems
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Post-concussive SyndromePost-concussive SyndromePost-concussive SyndromePost-concussive Syndrome 20% to 40% @ 3 months
post injury Neuropsychiatric
impairments attention concentration
Somatic headache (71%) fatigue (60%) dizziness (53%)
Affective – depression or anxiety
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EpilepsyEpilepsyEpilepsyEpilepsy
Seizure with 1 week post injury
PTA > 12 hrs Intracranial
hemorrhage Fixed neurologic
deficit EEG not helpful
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Psychiatric Psychiatric Psychiatric Psychiatric
Depression Headaches Anxiety Poor dreaming
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Monitoring Brain DysfunctionMonitoring Brain DysfunctionMonitoring Brain DysfunctionMonitoring Brain Dysfunction Cortical
Neuropsychiatric testing attention, STM, concentration, viso-spatial ability,
motor function Trail A&B, Stroop color-word test, VIGIL-W
Brain Stem BAEP’s
degree of abnormality correlates with severity abnormal 27-44% of MHI
ENG’s abnormal in 40-50% MHI & whiplash may be more sensitive than BAEP
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Cognitive/NeurobehavorialCognitive/NeurobehavorialCognitive/NeurobehavorialCognitive/Neurobehavorial
Unknown long term effects
Abnormal testing noted in F/U testing up to 4 months
Poor memory, info processing speed, attention, problem solving, and word fluency
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Neuropsychiatric TestingNeuropsychiatric TestingNeuropsychiatric TestingNeuropsychiatric Testing
ImPACT www.impacttest.com
HeadMinder www.headminder.com
CogSport www.cogsport.com
ANAM
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www.impacttest.com
ImmediatePost ConcussionAssessment &Cognitive Testing
ImPACTImPACTImPACTImPACT
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HeadMinderHeadMinderHeadMinderHeadMinder
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CogStateCogStateCogStateCogState
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ANAMANAMANAMANAM
Automated Neuropsychological Assessment Metrics
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Computer-based Computer-based Neuropsychiatric TestingNeuropsychiatric Testing
Computer-based Computer-based Neuropsychiatric TestingNeuropsychiatric Testing
No learning effect Data storage and
comparison to baseline
Easy to administer in Training Room
15-20 minutes
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Neuropsychiatric TestingNeuropsychiatric TestingNeuropsychiatric TestingNeuropsychiatric Testing
Acute injury Memory and
attention
Recovery/RTP Information
processing
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Follow up CareFollow up CareFollow up CareFollow up Care
First 24 hrs Serial neurologic
evaluations Every 2-3 hrs
Avoid sedating medications, narcotics, alcohol,
antihistamines Ice, Tylenol, light diet
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Follow-up CareFollow-up CareFollow-up CareFollow-up Care
Avoid contact activities Warn about possible
difficulty with reading, homework, and testing
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Disposition and TreatmentDisposition and TreatmentDisposition and TreatmentDisposition and Treatment
Second Impact Syndrome
Cumulative Effect?
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Second Impact Syndrome Second Impact Syndrome Second Impact Syndrome Second Impact Syndrome
Pathology Abnormal
autoregulation Cerebral vascular
congestion Diffuse edema/ ICH Midbrain herniation
Adolescent athletes
Sudden collapse Dilated pupils Respiratory failure Rapid deterioration
and death
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Recurrent InjuryRecurrent InjuryRecurrent InjuryRecurrent Injury
MBI may diminish cerebral reserve
2-4 times more likely to sustain a second injury
More prolonged disability with repeat injuries
Consider cognitive testing
Retrospective study of 2905 football players over 3 seasons
1 in 15 will have second concussion in same season with slower recovery of neurological function
JAMA 290:19;2549, 2003
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Return to PlayReturn to PlayReturn to PlayReturn to Play
No symptomatic athlete should be allowed to compete until symptoms have cleared
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Playing While SymptomaticPlaying While SymptomaticPlaying While SymptomaticPlaying While Symptomatic
Male football players Dizziness-29% Headache-61%
Male Soccer Dizziness-18% Headache-26%
Female athletes Dizziness-19% Headache-35%
Clin J Sport Med 2003;13:213-221
Denial vs. deficiency in symptom recognition and knowledge of consequences/sequelae
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Factors Influencing RTPFactors Influencing RTPFactors Influencing RTPFactors Influencing RTP
Age Younger brains recover slower Children with more prolonged and
diffuse cerebral swelling 60X more sensitive to glutamate ? Risk of permanent neurological deficit
Concussion history
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Return to Play (Cantu)Return to Play (Cantu)Return to Play (Cantu)Return to Play (Cantu)Grade 1st Concussion 2nd Concussion 3rd Concussion
Grade 1
Mild
Return if asx for 1 week
Return in 2 weeks if asx for
1 week
Terminate Season
Return next season if asx
Grade 2
Moderate
Return if asxfor 1 week
Return in 1 month if asx for
1 week
Terminate season;
Return next season if asx
Grade 3 Severe
Return in 1 month if asx for
1 week
Terminate season;
Return next season if asx
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Return to Play (Colorado)Return to Play (Colorado)Return to Play (Colorado)Return to Play (Colorado)
Grade Grade I Grade II Grade III
Recommendation Exam q5 min; RTP 20 min if Asx
RTP 1 wk if Asx Transfer to Hosp; RTP 2 wks if Asx
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American Academy of NeurologyAmerican Academy of NeurologyAmerican Academy of NeurologyAmerican Academy of NeurologyGrade 1st Concussion 2nd Concussion 3rd Concussion
Grade I
No LOC
Sx <15 min
RTP if Asx in 15 min
Asx for 1 wk Asx for 1 wk
Grade II
No LOC
Sx >15 min
Asx for 1 wk 2 weeks
Asx for 1 wk
2 weeks
Asx for 1 wk
Grade III a
Brief LOC
Asx for 1 wk 1 month or longer
1 month or longer
Grade III b
Prolonged LOC
Asx for 2 weeks
? ?
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11stst International Conference International Conference11stst International Conference International Conference
1. No activity with complete rest2. Light aerobic exercise-walk or stationary
bike3. Sport-specific exercise (skate, run,
swim, …)4. Non-contact training drill5. Full contact training after medical
clearance6. Game play
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Return to Play ProcessReturn to Play ProcessReturn to Play ProcessReturn to Play Process
Symptom free at rest
Symptom free with exercise
Normal neuropsychiatric Testing
Return
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2nd International 2nd International Conference on Concussion Conference on Concussion in Sportin SportPrague 2004Prague 2004
2nd International 2nd International Conference on Concussion Conference on Concussion in Sportin SportPrague 2004Prague 2004
Eliminate Grading
Simple or Complex Concussion
More emphasis on amnesia
“Cognitive rest” in Pediatric Concussion
SCAT
Individualized stepwise RTP
No same game RTP
Neuropsychological testing for complex concussions on asymptomatic athletes
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Future TrendsFuture TrendsFuture TrendsFuture Trends
Pro-activity Rules (spearing) Equipment Coaching Strength Training
Diagnosis Staging? Use of
Neuropsychiatric testing
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Future TrendsFuture TrendsFuture TrendsFuture Trends
Return to play More use of
neuropsychiatric testing
Imaging-f MRI, PET, SPECT)
RTP recommendations
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Concussion Scenario # 1Concussion Scenario # 1Concussion Scenario # 1Concussion Scenario # 1
History 19 yr old gymnast during vault under rotates
and lands head first on mat Does not move following injury, no seizure Conscious and able to communicate Complains of neck pain and a headache Is confused and having problems focusing her
eyes
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Concussion Scenario # 1Concussion Scenario # 1Concussion Scenario # 1Concussion Scenario # 1
Evaluation Normal upper and lower extremity neurological
evaluation After 5 minutes can recount incident and is alert Does not complain of nausea but feels “dazed” After another 10 minutes becomes irritable and
angry (she is normally quiet and sweet)
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Concussion Scenario # 2Concussion Scenario # 2Concussion Scenario # 2Concussion Scenario # 2
History 20 yr old football player is going for a tackle,
collided heads with an opposing player Player remains down on the field after incident,
no seizure Upon your arrival, athlete is conscious, but
seems confused about what happened Complains of being dizzy and unable to
concentrate
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Concussion Scenario # 2Concussion Scenario # 2Concussion Scenario # 2Concussion Scenario # 2
Evaluation Pupils are equal and reactive No neck pain, normal neurological evaluation of
upper and lower extremities States that they feel extremely tired and “in a
fog” Does not remember the collision and slow to
respond to questioning
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Concussion Scenario # 3Concussion Scenario # 3Concussion Scenario # 3Concussion Scenario # 3
History 18 yr old pole vaulter landed on his
head the previous day, no seizure Has had a headache and dizziness since
incident Try to continue to practice but was to
“unsteady” Complains of minor neck pain
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Concussion Scenario # 3Concussion Scenario # 3Concussion Scenario # 3Concussion Scenario # 3
Evaluation Having trouble sleeping and sensitivity to light Complains of headache and lack of appetite Having difficulty remembering things and
concentrating in class States he starting crying this morning when he
couldn’t find “the right” t-shirt to wear Has occasional ringing in his ears