Spinal Cord Injury
Spinal Cord Injury
Spinal Cord Injury
Neurosurgeon
Yoon Seung-Hwan
General Principles of Spine Injuries
Epidemiology
Definition
1. The ability of the spine under physiologic
loads to prevent displacements which
would injure or irritate neural tissue.
ABC's
Stablization for transport
don't move patient before stabilization of cervical
spine.
In hospital
Usual trauma protocol
Traction
rule of thumb is 5 pounds per spinal level above the
fracture/dislocation.
60-80 pounds are usually the upper limit in any case.
Pharmacologic treatment of S CI
1.Hypertension
adequate volume and normotension
2. Methylprednislone
within 8 hours of the SCI protocol
30mg/kg initial IV bolus over 15 minutes
followed by a 45 minute pause,
and then a 5.4 mg/kg/hr continuous infusion.
3. Naloxone
4. Triliazad
Plain Films
External
1. posterior occipito-atlantal ligament
(ligamentum flavum ends at C1).
2. anterior occipito-atlantal ligament.
3. ligamentum nuchae.
4. anterior longitudinal ligament.
Internal
1. cruciform ligament( transverse ligament )
2. accessory ligaments
3. apical ligament
4. alar ligaments
5. posterior longitudinal ligament
( tectorial membane )
Types of injuries
I. Atlanto-occipital dislocation.
II. Condylar fractures.
III. Atlanto-axial dislocation.
IV. Atlas fractures.
V. Odontoid fractures.
VI. Hangman's fractures.
VII. C3 fractures.
Atlas fractures
cervicomedullary
junction remains
unchanged
because of capacity
of spinal canal.
Jeffersons fracture
Clinical Features
Spence's Rule
If, on plain films, the distance of excursion
of lateral masses is 7 mm or more,
there is a transverse ligament rupture.
Treatment
Odontoid fractures
are the M/C
fractures of C2.
Classification
1. C1-C3 arthrodesis
2. C2 pedicle screws.
3. C2-C3 anterior discectomy with fusion
and plate.
Injuries of the Lower Cervical
Spine
Classification
I. flexion-dislocation
II. flexion-compression
III. compression burst
IV. extension
Criteria for Instability
failure of 2 of the 3
columns implies that
there will be instability.
1. anterior column
2. middle column
3. posterior column
Flexion Dislocation Injuries
A) unilateral facet
subluxation
B) bilateral facet
dislocation
Indications for surgery
A) wedge compression
B) teardrop flexion
fracture
Compression Burst Fractures
characterized by
axial loading
injuries to a spine
which is held in a
neutral or very
slightly flexed
position.
immobilized by
traction with a Halo
vest.
E xtension Injuries
absolute Indications
1. inability to obtain reduction
2. inability to maintain reduction
indications for emergent surgery
1. progression of neurological deficit
2. complete myelographic or MRI CSF block
3. fragments in spinal canal in incomplete SCI
4. necessity for decompressing a cervical nerve root
5. open or penetrating trauma
6. non-reducible fractures
Contraindications for emergent
surgery
1. complete SCI
2. central cord syndrome.
3. medically unstable patient.
Surgical techniques
posterior
approaches
anterior approaches
cervical orthoses
Thoracolumbar Spine Fractures
E pidemiology
6% of major spinal
injuries.
caused by
hyperflexion and
distraction of the
posterior elements.
the middle and posterior columns fail in
distraction with an intact anterior hinge.
unstable in flexion but will not present with
an
anterior subluxation, which would indicate
that the ALL is disrupted
(i.e. a fracture-dislocation).
PLL is also intact and sometimes fracture
fragments are moved back from the canal
simply by distraction.
Management
rare injuries.
hyperextension force tears the ALL and
leads
to separation of the disc.
all are unstable and require fixation.
Treatment
By Degree
according to Denis, first degree is mechanical
instability, second degree is neurolgical, and
third is both.
first degree: manage with external orthosis
i) >30 degree wedge compression fracture
ii) Seat belt injuries.
second degree: mixed category
third degree: all require surgery
i) fracture dislocations
ii) burst fractures who fail non-operative
management
iii) burst fractures who develop new
neurological deficit
Non-operative Therapy
1. trauma
2. vascular
3. infection
Pathophysiology