Nov 22, 2014
CROSS-SECTION
HEAD INJURY - DEFINITION
• Any injury that results in trauma to the SCALP,
SKULL or BRAIN.
• TRAUMATIC BRAIN INJURY and HEAD
INJURY are often used interchangeably.
HEAD INJURY - TYPESOPEN HEAD INJURY:
There is penetration to the skull.CLOSED HEAD INJURY
There is NO penetration to the skull.
COUP-CONTRECOUP INJURIES
• Damage may occur directly under the site of impact (COUP), or it may occur on the side opposite the impact
(CONTRECOUP).
HEAD INJURY - MECHANISMS
PRIMARY INTRACRANIAL INJURY
• It is the initial neuronal damage that occurs
IMMEDIATELY as result of trauma.
SECONDARY INTRACRANIAL INJURY
• Secondary injuries are the result of the
neurophysiological and anatomic changes, which occur from MINUTES to DAYS after the original
trauma.
HEAD INJURY - MECHANISMS
PRIMARY INTRACRANIAL INJURY
• Cerebral Laceration• Cerebral Contusion• Epidural Hematoma• Subdural Hematoma
• Subarachnoid Hematoma• Intracerebral Hematoma• Diffuse Axonal Injury
SECONDARY INTRACRANIAL INJURY
• Edema
• Impaired Metabolism
• Altered Cerebral Blood Flow
• Free Radical Formation
• Excitotoxicity
SCALP INJURIES
LACERATIONS SUBGALEAL HEMATOMA
SKULL INJURIES
CLOSED FRACTURES
• A closed fracture has a significant chance of
associated intracranial haematoma.
OPEN FRACTURES• Open fractures have
potential for serious infection.
• Any foreign matter impaled in the skull should be left in place for removal by the neurosurgeons.
• Cover it lightly with a sterile dressing that has been moistened with a sterile saline.
SKULL INJURIES
CT SCAN OT
SKULL INJURIESDEPRESSED FRACTURES/COMPOUND
DEPRESSED FRACTURES NON-DEPRESSED LINEAL FRACTURES
SKULL INJURIES - BASILAR SKULL FRACTURE
SKULL INJURIES - BASILAR SKULL FRACTURE
RACCOON EYE
SKULL INJURIES - BASILAR SKULL FRACTURE
BATTLE’S SIGN
SKULL INJURIES - BASILAR SKULL FRACTURE
BLEEDING FROM THE EAR CANAL CSF LEAKAGE FROM THE EAR OR NOSE
BRAIN INJURIES
DIFFUSE
• Concussion• Diffuse Axonal Injury
FOCAL
• Contusion• Brain Lacerations
• Epidural haematoma• Subdural haematoma
• Subarachnoid haemorrhage• Parenchymal haematoma
HEAD INJURY (DIFFUSE) - CONCUSSION
• Brain injury that does not result in any
evidence of structural alteration.
• Return of consciousness moments or minutes
after impact.
• There may be brief confusion,
disorientation, headache, dizziness,
amnesia.
• CT scan is normal.
HEAD INJURY (DIFFUSE) - DIFFUSE AXONAL INJURY
BRAIN CONTUSION
EPIDURAL HEMATOMA
SCHEMATIC CT SCAN
SUBDURAL HEMATOMA
SCHEMATIC CT SCAN
SUBARACHNOID HEMATOMA
SCHEMATIC CT SCAN
INTRACEREBRAL HEMATOMA
SCHEMATIC CT SCAN
HEMATOMAS
CEREBRAL EDEMA
NORMAL CT SCAN CEREBRAL EDEMA
SIGNS
A sign of ↑ICP (INTRACRANIAL PRESSURE)
CUSHING REFLEX
↑ Blood Pressure
↓ Pulse Rate
↓ Respiratory Rate
SIGNS
• A UNILATERAL , FIXED DILATED PUPIL indicates neurologic deterioration
may be secondary to hypoxia, hypovolaemia or
hypoglycaemia, due to ↑ICP, and compression of
the 3rd Cranial Nerve (OCULOMOTOR NERVE).
DILATED PUPIL
SIGNS
SIGNS
DECORTICATE POSTURING• Arms Flexed
• Arms bent inward on the chest
• Hands clenched into fists• Legs Extended
• Feet turned Inward• Score of 3 in the Motor
section of the Glasgow Coma Scale
SIGNS
DECEREBRATE POSTURING• Head is arched back
• Arms Extended by the sides• Legs Extended
• Patient is rigid with the teeth clenched.
• Score of 2 in the Motor section of the Glasgow
Coma Scale
SYMPTOMS
• Confusion/Irritibility
• Drowsiness
• Dizziness
• Nausea & Vomiting
• Amnesia
• Speech/Swallowing Difficulty
• CSF Leakage
• Ear Bleeding
• Numbness/Paralysis
• Coma
SYMPTOMS
SYMPTOMS
DIAGNOSIS
HISTORY
PHYSICAL EXAMINATION
HEAD & NEUROLOGIC EXAM
CT SCAN
DIAGNOSIS - HISTORY
PATIENT
PEOPLE
DIAGNOSIS - PHYSICAL EXAMINATION
ABCDE• A = AIRWAY
• B = BREATHING
• C = CIRCULATION
• D = DISABILITY
• E = EXPOSURE
• GLASGOW COMA SCALE (GCS)
• SYSTEMIC EXAMINATION
GLASGOW COMA SCALE
MINIMUM=3/15 MAXIMUM=15/15 INTUBATION <8/15
GLASGOW COMA SCALE (GCS)
SEVERITY SCORE
13-15
9-12
3-8
MILD
MODERATE
SEVERE
GLASGOW COMA SCALE (GCS)
SEVERITY LOSS OF CONSCIOUSNESS
0-30 mins
>30 mins to <24 hrs
>24 hrs
MILD
MODERATE
SEVERE
DIAGNOSIS - HEAD AND NEUROLOGIC EXAM
HEAD EXAM• Hematoma
• Contusion
• Fracture e.g. Basilar Skull Fracture
• Laceration
NEUROLOGIC EXAM• Cranial Nerves
• Muscle Tone
• Muscle Power
• Sensations
• Walking Gait
DIAGNOSIS - OTHERS
X-RAYS / MRI
ANGIOGRAPHY
EEG
TRANSCRANIAL DOPPLER
TREATMENT
ACUTE STAGE
CHRONIC STAGE
TREATMENT - ACUTE STAGE
CERVICAL IMMOBILIZATION
• Philadelphia Collar
TREATMENT - ACUTE STAGE (AIRWAY)
ENDOTRACHEAL INTUBATION
• If intubation is impossible: Laryngeal Mask or Cricothyrotomy are
indicated.
SIGNS OF ↓OXYGEN• Respiratory rate < 10 or >40
bpm.
• S02 <90% breathing oxygen or <85% breathing air
• Hypercarbia that implies pH<7.2
• Hypoxia Pa02<50 mm Hg
TREATMENT - ACUTE STAGE (AIRWAY)
LARYNGEAL MASK
TREATMENT - ACUTE STAGE (AIRWAY)
CRICOTHYROTOMY
TREATMENT - ACUTE STAGE (AIRWAY)
ENDOTRACHEAL INTUBATION
• Rapid sequence intubation is performed, using sedative
agents and muscle relaxants.
MECHANICAL VENTILATION STANDARD PARAMETERS
• Tidal Volume: 8-10 ml/kg
• Rate: 12-15 bpm
• Pressure: 15-20 cm H20
• Fi02: 1
TREATMENT - ACUTE STAGE (BREATHING)
• Start high-flow oxygen administration (10-12 l/min)
TREATMENT - ACUTE STAGE (CIRCULATION)
• Establish IV access with two large-bore(14- or16
gauge) IV cannulas.
• IV infusion of Normal Saline (NS).
• IV Norepinephrine
• AVOID giving 5% Dextrose unless hypoglycaemia is
present.
• Dextrose ↑cerebral oedema
• If BP is normal AVOID giving excessive volumes of fluids
that may ↑cerebral oedema.
TREATMENT - ACUTE STAGE (DISABILITY)
TREATMENT FOR ↑ICP
• IV Mannitol (Osmotic Diuretic)
• IV Furosemide
• Hyperventilation
TREATMENT - ACUTE STAGE (DISABILITY)
TREATMENT FOR ↑ICP
• If there are no counter-indications (hypovolaemia,
spine injury) place the patient in “Reverse-Trendelenburg”
position
REVERSE-TRENDELENBURG
TREATMENT - ACUTE STAGE (DISABILITY)
• If significant agitation and after excluding hypoxia, hypovolaemia or pain, as the cause of
agitation: IV Midazolam
TREATMENT - ACUTE STAGE (EXPOSURE)
• AVOID ↓Body Temperature
• ↑Body Temperature: Cooling measures and
IV Paracetamol
• Pain medication: IV Fentanyl
• Anti-Emetics
• Post-Traumatic Seizures: IV Diazepam
TREATMENT - ACUTE STAGE (PARAMETERS)
MONITOR• Blood Pressure
• Heart Rate
• Respiratory Rate
• S02, Etc02
• ECG
BLOOD SAMPLES
• Serum Electrolytes
• Arterial Blood Gas
• Hyper/Hypoglycaemia
TREATMENT - ACUTE STAGE (CATHETERIZATION)
NASOGASTRIC TUBE• Place a Nasogastric tube
(NG Tube) to decompress the stomach and reduce the
risk of vomiting as aspiration.
• AVOID NG Tube for patients with facial injuries. The tube
could enter the brain through a bony fracture.
TREATMENT - ACUTE STAGE (CATHETERIZATION)
URINARY CATHETER
• Insert an indwelling urinary catheter for hourly urine
output monitoring.
• AVOID insertion if injury is suspected to the urethra.
TREATMENT - ACUTE STAGE (SURGERY)
DECOMPRESSIVE CRANIOTOMY
TREATMENT - CHRONIC STAGE
REHABILITATION
Physiotherapy
Neurologists
Occupational Therapy
Speech and Language Therapy
Psychologists/Psychiatrists
COMPLICATIONS• Personality Changes
• Hypopituitarism e.g. DI
• Post-Traumatic Seizures
• Infections e.g. Meningitis
• Vasospasm, Aneurysm
• Coma, Brain Death
LONG-TERM EFFECTS• Parkinson’s
• Alzheimer’s Dementia
PREVENTION
HELMETS
SEAT BELTS
FALLS IN THE ELDERLY
RESTRICTING ALCOHOL USE