Spinal trauma consists of spine fractures, or spinal fractures, and spinal cord injuries. Approximately 12,000 spinal trauma cases are reported in the United States every year. While the most prevalent causes of spinal cord injuries and spine fractures are automobile accidents and falls, spinal trauma can also be attributed to assault, sports injuries, and work-related accidents. Diagnosis of spinal trauma includes imaging and assessment of nerve function, such as reflex, motor, and sensation. The following article discusses the role of emergency radiology in spinal trauma. Chiropractic care can help provide diagnostic evaluations for spinal trauma.
Spinal trauma is
The trauma of the spine weighs heavily on the budget of social and economic development of our society. In the USA, 1540 cases per million populations with 12,000 cases of paraplegia every year, 4000 deaths before admission and 1000 deaths during hospitalization are estimated. The young adult population is the most frequently involved in road accidents, followed by those at home and at work, with a prevalence of falls from high and sports injuries.1
Imaging has an important role in the management of spinal trauma. Quick and proper management of the patients with trauma, from diagnosis to therapy, can mean reduction of the neurological damage of vital importance for the future of the patient. Radiologists have a role of great responsibility to establish the presence or absence of lesions, defining the characteristics, assessing the prognostic influence and therefore treatment.
The aim of this paper was to describe:
- incidence and type of vertebral fracture
- imaging indication and guidelines for cervical trauma
- imaging indication and guidelines for thoracolumbar trauma
- multidetector CT (MDCT) pattern for trauma spine
- MRI pattern for trauma spine.
Spinal trauma, including spine fractures and spinal cord injuries, represent about 3 percent to 6 percent of all skeletal injuries. Diagnostic assessments are fundamental towards the complex diagnosis of spinal trauma. While plain radiography is the initial diagnostic modality used for spine fractures and/or spinal cord injuries, CT scans and MRI can also help with diagnosis. As a chiropractic care office, we can offer diagnostic assessments, such as X-rays, to help determine the best treatment.Dr. Alex Jimenez D.C., C.C.S.T.
Vertebral Fracture Management and Imaging Indication and Evaluation
The rationale of imaging in spinal trauma is:
- To diagnose the traumatic abnormality and characterize the type of injury.
- To estimate the severity, potential spinal instability or damaged stability with or without neurological lesion associated, in order to avoid neurological worsening with
- To evaluate the state of the spinal cord and surrounding structures (MR is the gold standard technique).
Clinical evaluation involving different specialitiesemergency medicine, trauma surgery,
A common question in patients with spine trauma is: is there still a role for plain-film X-ray compared with CT?
In order to clarify when and what is more appropriate for spinal trauma, different guidelines were published distinguishing cervical and thoracolumbar level.
Cervical Spinal Trauma: Standard X-Ray and Multidetector CT Indication
For cervical level, controversy persists regarding the most efficient and effective method between cervical standard X-ray with three film projections (anteroposterior and lateral view plus open-mouth odontoid view) and MDCT.
X-ray is generally reserved for evaluating patients suspected of cervical spine injury and those with injuries of the thoracic and lumbar areas where suspicion of injury is low. Despite the absence of a randomized controlled trial and thanks to the high quality and performance of MDCT and its post-processing (multiplanar reconstruction and three-dimensional volume rendering), the superiority of cervical CT (CCT) compared with cervical standard X-ray for the detection of clinically significant cervical spine injury is well demonstrated.
In order to reduce the patient radiation exposure, it is important to determine and to select patients who need imaging and those who do not, through the clinical evaluation and probability of cervical spine injury, using only MDCT for the appropriate patient as is more cost-effective screening.3
First of all, it is necessary to distinguish the type of trauma:
- minor trauma (stable patient, mentally alert, not under the influence of alcohol or other drugs and who has no history or physical findings suggesting a neck injury)
- major and severe trauma (
multitrauma, unstablepatient with a simple temporary neurological dysfunction, with focalneurological deficit or with a history or mechanism of injury sufficient to have exceeded the physiologic range of motion).
Second, it is important to establish if trauma risk factors are presents, such as:
violenceof trauma: high-energy fall (high risk) or low-energy fall (low risk)
- age of the patient: <5years old, >65 years old
- associated lesions: head, chest, abdomen (
- clinical signs: Glasgow Coma Scale (GCS), neurological deficit
Combining these elements, patients can be divided into low
risk and high risk for cervical injury.
The first group consists of patients who are awake (GCS 15), alert, cooperative and non-intoxicated without any distract- ing injury.
The second group consists of
CCT has a wider indication than X-ray for patients at very high risk of cervical spine injury (major trauma or
In 2000, the National Emergency X-Radiography Utilization (NEXUS) study,
- no tenderness at the posterior midline of the cervical spine
- no focal neurologic deficit
normallevel of alertness
- no evidence of intoxication
- no clinically apparent painful injury that might distract
the patientfrom the pain of a cervical spine injury.6
If all of these roles are present, the patient does not need to undergo X-ray because he has a low possibility of having a cervical spine injury with a sensitivity of 99% and a specificity of 12.9%.7
In 2001, the Canadian C-spine rule (CCSR) study developed a second decision rule using the risk factor of the trauma: three high-risk criteria (age $ 65 years, dangerous mechanism and paraesthesias in extremities), five low-risk criteria (simple rear-end motor vehicle collision, sitting position in
Applying these criteria, before cervical spine imaging, the authors report a decrease of about 23.9% in the number of negative CCT, and applying a more liberal NEXUS criteria including the presence or absence of pain, limited range of motion or posterolateral cervical spine tenderness, they report a decrease of up to 20.2% in the number of negative studies.2
If these clinical criteria cannot be applied, CCT must be performed.
Major and severe traumas request a direct CCT screening, especially because there could be associated lesions, according to the high-risk criteria developed by Blackmore and Hanson to identify patients with trauma at high risk of c-spine injury who would benefit from CT scanning as the primary radiological investigation9 Figure 1.
Thoracolumbar Spinal Trauma: Standard X-Ray and Multidetector CT I
It can replace conventional radiography and can be performed alone in patients who have sustained severe trauma.10
In fact, thoracolumbar spinal injuries can be detected during visceral organ-targeted CT protocol for blunt traumatic injury.
Thanks to multidetector technology, images reconstructed using a soft algorithm and wide-display field of view that covers the entire abdomen using a visceral organ-targeted protocol with 1.5-mm collimation are sufficient for the evaluation of spine fractures in patients with trauma, given that multiplanar reformatted images are provided without performing new CT study and without increasing radiation dose11 Figure 2.
With MDCT there is no information about spinal cord status or ligament lesion or acute epidural
CCT is strictly recommended in patients affected by blunt cerebrovascular injuries. Both lesions can be strictly correlated and generally; contrast medium administration to exclude hemorrhagic brain lesion and cervical fracture is not needed.10
Magnetic resonance imaging, or MRI, is a medical diagnostic assessment technique utilized in radiology to create pictures of the anatomy and the physiological processes of the human body. Alongside radiography and CT scans, MRI can be helpful in the diagnosis of spinal trauma, including spine fractures and spinal cord injuries. Magnetic resonance imaging may not be necessary for all cases of spinal trauma. However, it could provide detailed information on the other soft tissues of the spine.Dr. Alex Jimenez D.C., C.C.S.T.
Spinal Trauma and MRI
Even if MDCT is the first imaging modality in a patient with trauma, MRI is essential for the soft assessment of the ligament, muscle or spinal cord injury, spinal cord, disc, ligaments
In the management of patients with polytrauma, MDCT total-body scan is necessary
- Sagittal T1 weighted, T2 weighted and STIR sequence for the bone marrow and spinal cord injury or spinal cord compression evaluation owing to epidural
haematomaor traumatic herniated disc
- Sagittal gradient echo T2* sequence for
haemorrhageevaluation of the spinal cord or into the epiduralsubdural space
- Sagittal diffusion-weighted imaging helpful when evaluating spinal cord injury, differentiating cytotoxic from vasogenic
oedema, assisting in detecting intramedullary haemorrhage. It can help to evaluate the degree of compressed spinal cord.
- Axial T1 weighted and T2 weighted sequence for the right localization of the injury. Recently, for patients affected by acute blunt trauma and cervical spinal cord injury, the axial T2 weighted sequence has been shown to be important for trauma-predicting outcomes. On axial T2 weighted imaging, five patterns of intramedullary spinal cord signal alteration can be distinguished at the injurys
epicentre. Ordinal values ranging from 0 to 4 can be assigned to these patterns as Brain and Spinal Injury Center scores, which encompassed the spectrum of spinal cord injury severity correlating with neurological symptoms and MRI axial T2 weighted imaging. This score improves on current MRI-based prognostic descriptions for spinal cord injury by reflecting functionally and anatomically significant patterns of intramedullary T2 signal abnormality in the axial plane.15
MRI has also an important role in case of discordance between clinical status and CT imaging. In the absence of vertebral fracture, patients can suffer from back pain resistant to medical therapy owing to bone marrow traumatic
In spinal cord injury without radiologic abnormalities (SCI- WORA), MRI is the only imaging modality that can detect intramedullary or extramedullary pathologies or show the absence of neuroimaging abnormalities.16 SCIWORA refers to spinal injuries, typically located in the cervical region, in the absence of identifiable bony or ligamentous injury on complete, technically adequate, plain radiographs or CT. SCIWORA should be suspected in patients subjected to blunt trauma who report early or transient symptoms of neurologic deficit or who have existing findings upon initial assessment.17
Vertebral Fracture Type and Classification
The rationale of imaging is to distinguish the vertebral fracture type into two groups:
vertebral compression fracture as vertebral body fracture
compressing the anterior cortex, sparing the middle posterior
columns associated or not with kyphosis
burst fracture as
extending through both superior and inferior endplates with kyphosis or posterior displacement of the bone into the canal. and to distinguish which type of treatment the patient needs; by imaging, it is possible to classify fractures into
Using MDCT and MRI, thanks to morphology and injury distribution, various classification systems have been used for identifying those injuries that require surgical intervention, distinguishing among stable and unstable fractures and surgical and non-surgical fractures.1
Denis proposed the three-column concept, dividing the spinal segment into three parts: anterior, middle and posterior columns. The anterior column comprises the anterior longitudinal ligament and anterior half of the vertebral body; the middle column comprises the posterior half of the vertebral body and posterior longitudinal ligament; and the posterior column comprises the pedicles, facet joints
Magerl divided the vertebral compression fracture (VCF) into three main categories according to trauma force: (a) compression injury, (b) distraction injury and (c) rotation injury. Type A has conservative or non-surgical mini-invasive treatment indication.19
The thoracolumbar injury classification and severity score (TLICS) system
The Aebi classification is based on three major groups: A = isolated anterior column injuries by axial compression, B = disruption of the posterior ligament complex by distraction posteriorly and C = corresponding to group B but with rotation. There is an increasing severity from A to C, and within each group, the severity usually increases within the subgroups from 1 to 3. All these
Thoracolumbar Fracture and Mini-Invasive Vertebral Augmentation Procedure: Imaging T
Recently, different mini-invasive procedures called assisted- technique vertebroplasty (balloon kyphoplasty KP or kyphoplasty-like techniques) have been developed in order to obtain pain relief and kyphosis correction as
The rationale of these techniques is to combine the analgesic and vertebral consolidation effect of vertebroplasty with the restoration of the physiological height of the collapsed vertebral body, reducing the kyphotic deformity of the vertebral body, delivering cement into the fractured vertebral body with a vertebral stabilization effect compared with conservative therapy (bed rest and medical therapy).22
In fact, MDCT has the advantage of diagnosing VCF with kyphosis deformity easily, while MRI with STIR sequence is useful to evaluate bone marrow
Patients affected by vertebral fracture without bone marrow
According to imaging, Magerl A1 classification fractures are the main indication of treatment.
However, the treatment must be performed within 23 weeks from trauma in order to avoid sclerotic bone response: the younger the fractures, the better the results and easier the treatment and vertebral augmentation effect. To exclude sclerotic bone reaction, CT is recommended.
The management of spinal trauma remains complex. MDCT has a wide indication for bone evaluation in patients affected by severe trauma or patients with high risk of spine injury. MRI has a major indication in the case of spinal cord injury and the absence of bone lesion. D
Curated by Dr. Alex Jimenez
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Additional Topics: Acute Back Pain
Back pain is one of the most prevalent causes of disability and missed days at work worldwide. Back pain attributes to the second most common reason for doctor office visits, outnumbered only by upper-respiratory infections. Approximately 80 percent of the population will experience back pain at least once throughout their life. The spine is a complex structure made up of bones, joints, ligaments, and muscles, among other soft tissues. Because of this, injuries and/or aggravated conditions, such as herniated discs, can eventually lead to symptoms of back pain. Sports injuries or automobile accident injuries are often the most frequent cause of back pain, however, sometimes the simplest of movements can have painful results. Fortunately, alternative treatment options, such as chiropractic care, can help ease back pain through the use of spinal adjustments and manual manipulations, ultimately improving pain relief.