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Spinal Cord Injuries: Differential Diagnoses & Workup
Updated: Apr 8, 2009
- Overview
- Differential Diagnoses & Workup
- Treatment & Medication
- Follow-up
- Multimedia
Differential Diagnoses
Dissection, Aortic
Epidural and Subdural Infections
Hanging Injuries and Strangulation
Neck Trauma
Spinal Cord Infections
Syphilis
Other Problems to Be Considered
Transverse myelitis
Acute intervertebral disk herniation
Extradural spinal cord compression
Workup
Laboratory Studies
- Arterial blood gas measurements may be useful to evaluate adequacy of oxygenation and ventilation.
- Lactate levels to monitor perfusion status can be helpful in the presence of shock.
- Hemoglobin and/or hematocrit levels may be measured initially and monitored serially to detect or monitor sources of blood loss.
- Perform urinalysis to detect associated genitourinary injury.
Imaging Studies
- Diagnostic imaging begins with the acquisition of standard radiographs of the affected region of the spine. Recent investigators have shown that CT scanning is exquisitely sensitive for the detection of spinal fractures and is cost effective.8,9 However, a properly performed lateral radiograph of the cervical spine that includes the C7-T1 junction can provide sufficient information to allow the multiple trauma victim to proceed emergently to the operating room if necessary without additional intervention other than maintenance of full spinal immobilization and a hard cervical collar. In some centers, CT scanning has supplanted plain radiographs.
- The standard 3 views of the cervical spine are recommended: anteroposterior, lateral, and odontoid.
- Anteroposterior and lateral views of the thoracic and lumbar spine are recommended.
- Radiographs must adequately depict all vertebrae.
- The cervical spine radiographs must include the C7-T1 junction to be considered adequate.
- A common cause of missed injury is the failure to obtain adequate images.
- CT scanning is reserved for delineating bony abnormalities or fracture. Some studies have suggested that CT scanning with sagittal and coronal reformatting is more sensitive than plain radiography for the detection of spinal fractures.8,10
- Radiography is insensitive to small fractures of the vertebra.
- Perform CT scanning in the following situations:
- When plain radiography is inadequate or fails to visualize segments of the axial skeleton
- Convenience and speed: If a CT scan of the head is required, then it is usually simpler and faster to obtain a CT of the cervical spine at the same time. Similarly, CT images of the thoracic or lumbar spine might be easier and faster to obtain than plain radiographs.
- To provide further evaluation when radiography depicts suspicious and/or indeterminate abnormalities
- When radiography depicts fracture or displacement: CT scanning provides better visualization of the extent and displacement of the fracture.
- Recently published clinical criteria have established guidelines for cervical spine radiography in symptomatic trauma patients with neck pain. The NEXUS criteria and the Canadian C-spine rules have recently been validated in large clinical trials. These algorithms may be used to guide physicians to determine whether or not imaging of the cervical spine is required.11,12,13
- Adequate spinal radiography supplemented by CT scanning through areas that are difficult to visualize or are suspicious detects the vast majority of fractures with a reported negative predictive value between 99% and 100%.8
- Dynamic flexion/extension views are safe and effective for detecting occult ligamentous injury of the cervical spine in the absence of fracture. The negative predictive value of a normal 3-view cervical spine series and flexion/extension views exceeds 99%. The incidence of occult injury in the setting of normal findings on cervical spine radiography and CT scanning is low, so clinical judgment and the mechanism of injury should be used to guide the decision to order flexion/extension views.
- MRI is best for suspected spinal cord lesions, ligamentous injuries, or other soft tissue injuries or pathology.
- MRI should be used to evaluate nonosseous lesions, such as extradural spinal hematoma; abscess or tumor; disk rupture; and spinal cord hemorrhage, contusion, and/or edema.
- Neurologic deterioration is usually caused by secondary injury, resulting in edema and/or hemorrhage. MRI is the best diagnostic image to depict these changes.
- Noncontiguous spinal fractures are defined as spinal fractures separated by at least one normal vertebra. Noncontiguous fractures are common and occur in 10-15% of patients with spinal cord injury. Therefore, once a spinal fracture is identified, the entire axial skeleton must be imaged, preferably by CT, to assess for noncontiguous fractures.14,5,15
More on Spinal Cord Injuries |
| Overview: Spinal Cord Injuries |
Differential Diagnoses & Workup: Spinal Cord Injuries |
| Treatment & Medication: Spinal Cord Injuries |
| Follow-up: Spinal Cord Injuries |
| Multimedia: Spinal Cord Injuries |
| References |
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References
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Further Reading
Keywords
spinal cord injury, SCI, anterior cord syndrome, Brown-Séquard syndrome, central cord syndrome, conus medullaris syndrome, cauda equina syndrome, incomplete SCI syndromes, spinal cord concussion, spinal cord injury syndromes, SCIWORA, spinal cord injury without radiologic abnormality
Differential Diagnoses & Workup: Spinal Cord Injuries