body trauma --hossam massoud
TRANSCRIPT
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بسم هللا الرحمن الرحيم
قالوا
العلم لن سبحانك ا إال ماعلمتنا
كيم إنك أنت العليم الح
صدق هللا العظيم(32اآلية –سورة البقرة )
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Body Trauma –
Radiological viewBy
Hossam MassoudNational cancer institute - cairo
university
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Manifestations;
Primary manifestation
Secondary manifestation
Vascular effect of trauma
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Primary manifestation
Skull fractures Fissure fractures
Depressed fractures
Extracerebral
haematomas Extradural haematoma
Subdural haematoma
Subarachnoid haematoma
Intraaxial lesions Cerebral parenchymal
contusion
White matter shearing
injury (DAI)
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Secondary manifestation Major secondary effect
of trauma
Cerebral herniation
midline shift
Traumatic ischaemia
/ infarction
Diffuse cerebral
oedema
Hydrocephalus.
Brain death
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Vascular effect of trauma Primary vascular injuries
Laceration and intimal tear
Dissection and transection.
Thrombosis and occlusion.
Arteriovenous fistula
Dural sinus / cortical veins laceration or occlusions
Seconday vascular effects Occlusion caused by cerebral herniations (ACA, PCA or
lenticulostraite arteries)
Flow reduction caused by marked increase of intracranial pressure
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CT Indication Loss of consciousness or amnesia
Glasgow coma scale score below 15
Focal neurological abnormality
Intoxication.
Depressed skull fracture / penetrating injury
Patient age below 2 and above 60y
Bleeding disorder / anticoagulation
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Skull fractures
Types
Linear
Depresed
Diastatic
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Extra axial haemorrhage
Types
Epidural haematoma
Subdural haematoma
Subarachnoid haematoma
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Epidural haematoma Etiology
Forceful impact of calvarium
fracture
Transient depression of skull
fragment lacerates dural artery
Blood collects between inner
table and outer layer of dura
Dural is stripped away from
inner table forming biconvex
mass
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Epidural haematoma- CT
findings
Oftenly accompanied with fracture.
Biconvex / lenticular
Extra axial
Hyperdense mass
Few cases might be hypodense Rapid / active bleeding
Aneamia
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Epidural haematoma- CT
findings
Biconvex
Extra axial
Hyperdense mass
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Subdural haematoma Etiology
Sudden deceleration of head
stretch & tear cortical
veins as they cross the
potential subdural space
Incidence 10-20%
Location
Between dura and arachnoid
Frontoparietal
may be bilateral
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Subdural haematoma- CT
findings
Acute;
Sub acute;
Chronic;
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Subdural haematoma- CT
findings
AcuteCrescent shaped
Hyperdense
or
mixed (active
bleeding)
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Subdural haematoma- CT
findings
Subacute
Crescent isodense with
underlying cortex
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Chronic
Crescent
Hypodense
May have
sepitations.
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Subarachnoid haematoma
Moderate to severe head injury
Worse prognosis.
Similar to aneurysmal SAH blood filling the
cisterns and sulci
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Subarachnoid haematoma
CT Findings
Hyperdensity
smearing the
cisterns and sulci
Associated diffuse
axonal injury
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Diffuse axonal injury
(DAI-Shearing effect)
About 50% of all primary intra-axial injuries are
DAI.
most common cause of significant morbidity in
CNS trauma.
Etiology
Acceleration / deceleration / rotation forceso Deform
o Tear axons
o Tear penetrating vessel
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Diffuse axonal injury
(DAI-Shearing effect)
Location
Subcortical white matter
Posterior limb internal
capsule
Corpus callosum
Dorsolateral midbrain
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CT Findings may be normal despite
the patient's presentation with a profound neurological deficit.
ill-defined areas of high density or hemorrhage in the characteristic locations
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Cerebral Contusion
Brain impacts an
osseous ridge or a
dural fold
Foci of punctate
hemorrhage or edema
are located along
gyral crests
Locations
Frontal lobe - anterior
pole, inferior surface
Dorsolateral midbrain
Inferior cerebellum
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Intraventricular Hemorrhage
Commonly associated
with associated with
Diffuse axonal injury
Deep gray matter
injury
Brainstem contusion
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Proportionate inter-spinouts distances
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Neural arch fracture of C1
DD
Stable with less neurological injuries
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5
Pitfall
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Burst fracture
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Facet joints
Normally;
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Facet Injury (perched / locked
facets)
Unilateral locked
facet
Bowtie
Bilateral locked
facet;
Anterolistheisis with
neurological deficit
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Thoracic trauma may involve
injuries to:
1- chest wall / Thoracic cage.
2- Diaphragm.
3- Lung and pleura.
4- Tracheobronchial tree.
5- heart and Mediastinum
1
2
34
5
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1- Chest wall injuries
–Chest wall contusion
–Rib fractures
–Flail chest (more than 2 ribs in more
than 2 sites)
–Sternal fractures
–Fractures of the clavicle and shoulder
girdle
–Fracture spine.
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•Multiple rib fractures
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Rib Fractures
• Associations;
• First Rib 1 only facial fractures
• Ribs 1, 2 and 3 Serious Trauma
Ruptured bronchus
• Ribs 4 to 9 pneumothorax, contusion
• Ribs 10 to 12 lacerations of liver/spleen
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Complications
• Abnormal Collections Of blood & Air
– Pleura == hemothorax & Pneumothorax
– Mediastinum== hemo & Pneumomediastinum
– Pericardium == hemo & Pneumopericardium
– Subcutaneous emphysema
– Others
•==
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Complications
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Sternal fractures;•high-morbidity, with a mortality 25-45%.
•Usually complicated.
Post.rib Fracture
contusions
Sternal
Fracture
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Fractured sternum (arrowed)
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Pulmonary Contusion
• Most common finding in
blunt chest injury
• It presents mild Hemorrhage
into lungs
• Appears within 6 hours of
injury
• Clears in 48 hours
• Usually at point of impact
The 3 components of a
pulmonary contusion include
edema, hemorrhage, and
atelectasis .
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•Sternal Fx.
•Retrosternal hge
•Lung contusion
•HT
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Pulmonary Laceration
(Traumatic Lung Cyst)
• Usually not apparent at first because of
surrounding contusion
• Laceration of the lung parenchyma
Usually occurs subpleural under point
of maximum impact
• Half are solid, half are cystic
• Takes up to 6 months to clear
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Pneumothorax
• A pneumothorax refers to a collection of gas in the pleural space resulting in collapse of the lung on the affected side.
• A tension pneumothorax is air within the pleural space that is under pressure; displacing mediastinal structures and compromising cardiopulmonary function.
• A traumatic pneumothorax results from blunt or penetrating injury that disrupts the parietal or visceral pleura.
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Traumatic Pneumothorax
• Must see visceral pleural white line
• Absence of lung markings peripheral to
pleural line
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Pneumomediastinum & pneumopericardium
Continuous diaphragm sign
Pneumopericardium
# above great Vs
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Hemomediastinum
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Rupture of the Diaphragm
• Left hemidiaphragm affected almost
always
• May not occur for weeks after trauma
• Hernia may contain omentum,
stomach,
large and small bowel, spleen, kidney
• DD == eventration & hernia.
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Radiological features
• Air-fluid levels or abnormal air collection above diaphragm
• Abnormal elevation of one (usually left) hemidiaphragm with or without herniated gastric fundus or colon
• Contralateral tension displacement of mediastinum
• Abnormal location of NG tube
• DD of herniation by coronal +/- contrast images
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Introduction
Trauma is the leading cause of death
under the age of forty.
Of all traumatic deaths, abdominal
trauma is responsible for 10%.
Initial clinical examination and 1st aid
management followed by other
diagnostic options.
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Diagnostic tools
Physical
examination
Laboratory tests
Observation
Diagnostic imaging
Exploratory
labarotomy
Diagnostic
Imaging; Plain Radiography
Ultrasound
CT
Contrast studies
Plain Radiography
•Fractures
•Air under the diaphragm
•Foreign bodies
Ultrasonographphy•Parenchymal
injuries (less
sensitive)
••Fluid collections
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Findings to look for;
Hemoperitoneum
Pneumoperitoneum
Organ Laceration
Contusions
Hematomas (peri , Subcapsular or intra)
Devascularization of organs or parts of organs
Contrast blush =active extravasation
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Spleen
The spleen is the most commonly injured
solid organ in about 25% of all patients
with abdominal trauma
IIIIII
IIIIV Shattered
Hemoperitonium
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Contrast blush
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Contrast blush
DD;Active arterial extravasation
Post-traumatic Pseudoaneurysm
Post-traumatic AV fistula
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laceration
hematoma
Hge
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Liver
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Liver 2nd most commonly involved solid organ in the
abdomen after the spleen.
Liver injury is the most common cause of death (many
major vessels in the liver, like the IVC, hepatic veins,
hepatic artery and portal vein).
Posterior segment of the right liver lobe is the most
frequently injured part (involves the bare area and this
can lead to retroperitoneal bleeding rather than bleeding
into the peritoneal cavity).
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I-IIII
IIIIII
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G-V
>10 cm Subcap. He + C. blush
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Stellate laceration
Branching laceration
Avulsed right hepatic vein
G-V
Active bleedingActive bleeding
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Similar to spleen + G-VI due to 2 lobes of liver
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Pancreas Pancreatic injuries account for 3-10% of all abdominal
injuries.
The mechanism of injury usually involves
compression between the spine and abdominal
wall during a forceful blow to this area.
Pancreatic injuries are often associated with other
injuries and carry a relatively high mortality rate,
approximately 25%.
50% of pancreatic trauma related deaths are due to
hypovolemic shock from major visceral hemorrhage.
For this reason, rapid and accurate diagnosis of
pancreatic injury is vital.
Pancreatic laceration is often subtle particularly
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laceration
Contusion +hge
Avulsion + hge
Ductal # +pseudo cyst
Pancreatitis + dudenal hge
pseudo cyst +gerota’s F
Associations &
complications
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Kidneys
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