Thorasic and lumbar spinal injury · 2013-11-25 · Initial evaluation and management. Systematic...
Transcript of Thorasic and lumbar spinal injury · 2013-11-25 · Initial evaluation and management. Systematic...
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Thorasic and lumbar
spinal injury
Dr.Abrisham
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Goal : alignment
Stability
Preserve neuologic function
early mobilization
Incidence: most site is thoraco lumbar
50% T11 to L1
30% L2 to L5
Motor vehicle
25% full greater 6 feet
Neurologic deficit 20%
Associated injury 50%
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Anatomic consideration:
Thorasic : 1) greatest intrinsic stability
2) relative narrow canal
3) greater axial rotation
Lumbar: greater flex and ext.
Thoracolumbar junction: transition zone
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Mechanism of injury
axial compression
lateral compression
flexion
extension
distraction
shear
rotation
The most common force is
flex – rotation and flex – distraction
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Initial evaluation and management.
Systematic fashion review
Supine position + rigid board or collar
Splint of extremity
View back for:
laceration
ecchymosis
local tenderness
swelling
step off
Attension to spinal cord injury
Attension to hypo perfusion and hypotension
Associated injury
Pharmacologic agent
Systemic hypothermia after SCI
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Initial neurologic evaluation
motor and sensory and reflex examination
motor function grade 0-5
rectal sphincter tone and volitional control
sensory function dermatome and sacral sparing.
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Spinothalamic tract function
pain
Light touch
temperature
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Post column function
Vibration
Position sense
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Reflex:
super fascial abdominal T1 – T10 , T11 – L1
cremastric T12 – L1
patellar tendone L3 – L4
achill reflex S1
anal wink S2 – S4
bubo cavernous S2 – S4
clonus
babinski test
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Ref - → spinal shock
Ref + → negative spinal shock
Spinal shock
• Resolve after 24-48
• Return of reflex below injury
• Bulbo cavenosus Ref. is first return
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Neurologic injury classification
complete or incomplete
central cord: upper motor involument
sparing of lower extrimity
the most common in complete injury
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Ant cord syn:
the most is in complete
in the thorasic spine
poor prognosis
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Post cord syn:
vibratory and position
preserve bowel and bladder function
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Brown – sequard syn:
ipsilat motor and control at pain temperature and
light touch
preserve bowel and bladder function
the best prognosis for recovery
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Conus medullaris T12 – L1 level
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Radiologic evaluation
first detect spine injury
second detect stability
Ap and lat x-ray
swimmer's view for upper thorasic
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In lat x-ray
height
width
alignment
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In Ap x-ray
alignment
Inter pedicular distance
Alignment of spinous process
Rib and transverse process
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CT scan:
some center screening CT scan
sequential 5 mm
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MRI
Cord evaluation
Soft tissue evaluation
Hemorrhage
Hematoma
Compression
Neural transection
Predicting recovery
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Concept of spinal stability and its rule
in fracture classification systems
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Mechanical spinal stability:
ability to resist physiologic load without
progressive deformity or damage to the
neural element
Spinal neurologic stability:
presence or abscence of a neurologic deficit
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Fracture classification systems
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Nicoll 1949
Ant wedge Fx
Lat wedge Fx
Fx – Dx
Isolated neural arch Fx
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Holds worth
2 column concept
Flex.
Flex – rotation
Extension
Compression
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Mechanical instability failure of 2 column
from 3 column
Denis
3 column
Compression Fx
Burst Fx
Flex - distraction
Fx – Dx
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MCA fee
Base of CT scan
Wedge compression
Stable burst
Unstable burst
Chance
Flex - distraction
Translational
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Ferguson – Allen
3 column + force
Compressive flex.
Distractive flex.
Lat flex.
Translational
Torsional flex.
Vertical compression
Distractive – extension
Isolated transverse process Fx
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vertebral body compression
Ao classification ant & post element + distraction
ant & post + rotation
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Thoracolumbar injury classification & severity score
(TLICS)
Base morphology Integrity of post
lig Neurologic
status
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morphology
1 compression Fx
+ burst component
2 translation or rotation
3 distraction injury
3 combination injury
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PLC
1 Intact PLC
1 Intermediate PLC
Signal change in T2 without structuial mal alignment
2 disrupted PLC
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Neurologic status
0 intact neurologic
2 simple nerve root injury
2 complete neurologic deficit (motor & sensory)
3 in complete neurologic deficit
3 cauda eqina deficit
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Total score 3 non surgical
Total score 5 surgical treatment
Total score 4 gray zone
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Description & diagnosis of
specific fracture type
Sprain: injury of ligament and musculotendinous
X-ray is enough
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Indication
CT or MRI
• High – energy mechanism
• Unreliable history
• Significant physical examination
• Obvious swelling
• Neurologic injury
• Anky losing sponditis
• Congential anomaly
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Disc herniation
traumatic disc herniation
usually associated with Fx
MRI
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Minor Fx
Transverse process Fx
indirect trauma
Spinous process Fx
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pars Fx
Stable Fx
lamina Fx
CT scan
articular process Fx
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Compression Fx
axial compression through body sup or inf end
plate or buckling of ant cortex or both end plate
the main distinguishing feature of compression is
predominant failure of ant column in compression
, where as the flex – distraction injury is
characterizedly predominant failure of post
column in tension
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Burst Fx:
Axial compression through body
Lat compression cause an variant
Asymmetrical in coronal plane
Middle column involvment
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Flex – distraction injury (chance Fx)
distractive force > crushing force
Tension failure of the post ligamentous complex
and associated ant and middle column
Axis of rotation is in front of ant column
Normal ant column height
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2 type injury
Osseous (chance Fx)
Disco ligamentous (chance variant)
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Facet Dx in CT scan
naked facet
or empty facet sign
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Fx – Dx
Hall mark: unilat or bilat facet disruption
translation in Ap or lat x-ray
mechanism
Shear
Rotation
Distraction
Flex. & Ext.
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Extension & extension–distraction injury
Commonly seen in AS , DISH
Gap in ant or middle column
Naked facet sign
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Penetrating injury:
Almost always is stable
MRI is controversial
risk of migration
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General treatment:
Operative or non operative clue to treatment
Mechanical instability
Neurologic deficit
Significant spinal deformity
Multiple injury
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Bracing principle
Mechanical stable Fx
Brace
neurologic intact
Upper lumbar or thoracolumbar Fx
1. jevet – type hyperextension for sagital
plane injury
2. custom – molded total contact for coronal
or rotational component
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Lower lumbar Fx (below L3) → TLSO
with in corporation to one thigh
Fx above T6 → cervico thorasic orthosis
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Regardless of the level and type of injury
once the brace is fit, up right radiography
should be obtain to make sure the Fx is
stable in the brace.
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Brace worn in out of bed
Bending and twisting is forbidden
Lifting over l0 pound is forbidden
Typical brace duration is 3 month
F/U in 2w , 6w x-ray in upright
x-ray in brace → 6-8 interval
Flex and extension x-ray after weaning
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Surgical principles
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(1)
Achieving and maintaining anatomic
reduction and stability
surg approach and instrumentation
Post pedicle screw are more rigid than anterior
Quite versatile
Ant spine is main axial load bearing
neural element decompression
Ant app
restoration of ant column
Ant app must supplemently post instrument
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(2)
Decompression
Neurologically intact patient
with significant canal
compromise of 50% or more
do not benefit from decompression
Decompression reserve for neurologic deficit
Resorption of retropulsed
Neurologic deficit + retro pulsed bone
decompression in 48h.
direct or indirect.
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(3)
Minimization of construct length
Long segment: 2 level above
and 3 level below
Short segment: one level above
one level below
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(4)
Appropriate surgical timing
Early decompression depend or many factor
Progressive deficit quickly
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(5)
Avoidance of complication
complication
Dural tear
Iatrogenic neural injury
Pseudo arthrosis
Failure of fixation
Iatrogenic flat back
Infection
Medical complication
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Specific treatment
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Sprain or minor Fx
* Brace
* Not to be rigid
• in L5 transverse process Fx define post
lig injury or sacral Fx
* in minor Fx may have more significant
intra abdominal injury
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Traumatic disc herniation
very rare
similar to nontraumatic
bracing not necessary
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Compression Fx
Usually intrinsically stable
Postural reduction and plaster cast
immobilization
significant + kyphosis (30o)
Surgery
vertebral body height (50%)
Post pedicle screw + fusion
Surg in 7-10 d of injury
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Burst Fx
stable burst Brace
Unstable burst Surg
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Factor guiding treatment of burst Fx
Neurologic deficit
Extent of spinal canal compromise
Degree of deformity
Integrity of post lig
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Neurologic intact + kyphosis < 30o
+ vertebral height < 50% Brace
+ minimal post lig injury
Burst Fx + neurologic deficit (unstable) Surg
Burst Fx + post lig injury Surg
highly comminuted
Ant app
height loss > 50%
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Definition of post lig injury is border line
Mobilization in brace with serial upright x-ray
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Long term outcome depend on neurologically
injury
Outcome of surg and brace is similar
Some loss of height after both type treatment
Kyphosis > 30o is the least desirable and the
most predictor of back pain
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Flex – distraction injury (chance Fx)
Incidence 10% - 15%
Due to lap – belt
High intra abdominal injury
Focal kyphosis
Brace stable bong injury
minimally anagulated bony
minimal angulated : reduction of kyphosis in
supine position
Unstable bony or lig surg
Failure of brace in kyphotic deformity of greater
than 20o
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Fx – Dx
highly unstable
75% neurologic injury
Only surg
Awake positioning in neurologic intact
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Extension – distraction injury
Unstable
Awake positioning
Surg
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Penetrating injury
gun shot wound
rarely mechanical unstable
one column injury No brace
2 column injury brace
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Indication surg
• If bullet cause compression and neurologic
deficit
• In stable neurologic deficit surg be perform at 7-
10 d
• CSF fistule in %6
• Usually instrumentation no need
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