Cervical spine Flashcards
When obtaining a history discuss the implications of the following key areas and what associated questions may need to be asked to assess for red flag
Mechanism of injury - direction of forces eg flexion, flexion-rotation, extension, vertical compression
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When obtaining a history discuss the implications of the following key areas and what associated questions may need to be asked to assess for red flag
Mechanism of spinal cord trauma - transection, compression, contusion, vascular injury
Spinal column injury may result in spinal cord or brain injury through a number of mechanisms:
-Transection - penetrating or massive blunt trauma resulting in spinal column injury may transect all or part of the spinal cord
- compression: When elderly patient with cervical OA and spondylosis forcibly extend their neck, the spinal cord may be compressed between an arthritically enlarged anterior vertebral ridge and a posteriorly located hypertrophied ligamentum flavum. Injuries that produce blood within the spinal canal can also compress the spinal cord
- Contusion - contusions of the spinal cord can occur from bony dislocations, subluxations or fracture fragments
- Vascular compromise - Primary vascular damage to the spinal should be suspected where there is a discrepancy between clinically apparent neurologic deficit and a known level of spinal column injury.
Knowledge of the location of nerve tracts within the spinal cord will help the clinician understand the syndromes that occur after injury.
A patient with complete cord syndrome will present early with flaccid paralysis and loss of sensation below the injury. Reflexes are absent and there will be no response to the Babinski test. Periapism may appear and generally lasts for a day. Within 1-3 days, hyperactive reflexes, positive babinski and spasticity develop.
Incomplete cord injury is usually more challenging to diagnose. There is significant variation in presentation. The anterior cord syndrome occurs in the setting of hyperflexion of the cervical spine in most cases. The anterior 2/3of the cord are affected and the dorsal columns, controlling light touch, proprioception and vibratory sense are spared to a variable degree.
Central cord syndrome is due to hyperextension, frequently in patients with preexisting cervical degenerative joint disease. In this setting, the central portion of the cord is compressed between the ligamentus flavum and bony osteophytes. Clinically, the patient will exhibit weakness that is greatest in the upper extremities with variable amounts of sensory loss and bladder dysfunction.
Lastly, the Brown-Sequard syndrome is a rare condition due to unilateral loss of cord function. The patient will exhibit paralysis with loss of proprioception, vibration, and light touch on the side of the damage and loss of pain and temperature sensation on the contralateral side.
When obtaining a history discuss the implications of the following key areas and what associated questions may need to be asked to assess for red flag
MVA details eg speed, direction of impact, use of seabelts
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When obtaining a history discuss the implications of the following key areas and what associated questions may need to be asked to assess for red flag
MBA/Cyclist details eg damage to helmet, speed
Motorcycle helmet removal - safe removal of a motorcycle helmet requires that manual cervical spine immobilisation be maintained continously, and this can be only be done with 2 people.
When obtaining a history discuss the implications of the following key areas and what associated questions may need to be asked to assess for red flag
Fall from height (eg 3m, 5m) vs standing (force of impact), headstrike, loss of consciousness
Pain following a fall, especially in an elderly patient, suggests a possible fracture. In patients that sustain a more significant traumatic injury, a fractures should be considered until proven otherwise.
When obtaining a history discuss the implications of the following key areas and what associated questions may need to be asked to assess for red flag
Skin integrity (wound)
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When obtaining a history discuss the implications of the following key areas and what associated questions may need to be asked to assess for red flag
Time of injury, ability to move arms/legs post injury
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When obtaining a history discuss the implications of the following key areas and what associated questions may need to be asked to assess for red flag
Mental status such as intoxicated at time of injury?
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When obtaining a history discuss the implications of the following key areas and what associated questions may need to be asked to assess for red flag
Limb symptoms such as numbness, pins and needles, ‘dead’ arm or leg, tingling, weakness, foot drop
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When obtaining a history discuss the implications of the following key areas and what associated questions may need to be asked to assess for red flag
Bladder bowel disturbance (both post injury and current)
Neck pain associated with lower extremity weakness, gait or coordination difficulties and/or bladder or bowel dysfunction suggests possible cord compression or myelopathy
When obtaining a history discuss the implications of the following key areas and what associated questions may need to be asked to assess for red flag
Other sites of injury and potential for organs to be involved
Anterior neck pain is not typical for cervical spondylosis and non-spinal causes of neck pain, including angina pectoris and visceral etiologies should be considered.
What other key information is required to assess for red flags?
Pain that persist at rest or is worse at night may herald un underlying malignancy or spinal infection.
The following clinical characteristics suggest the potential for serious disease that requires urgent evaluation
Neck pain associated with lower extremity weakness, gait or coordination difficulties and/or bladder or bowel dysfunction suggests possible cord compression or myelopathy
A shock like paresthesia occuring with neck flexion suggests compression of the cervical cord by a midline disc herniation or spondylosis but may also be a sign of intramedullary pathology such as MS
Neck pain associated with fever raises concern for infection. Immunocompromised patients and those with a history of injection drug use are at increased risk of infection and thus there is low threshold for performing an infectious workup
Neck pain with unexplained weight loss or history of cancer raises concern for malignancy
Neck pain associated with headache, shoulder or hip girdle pain or visual symptoms in an older person may suggest rheumatologic disease
Anterior neck pain is not typical for cervical spondylosis and non-spinal causes of neck pain, including angina pectoris and visceral etiologies should be considered.
What key information would suggest an upper motor neuron lesion/cord compression or spinal syndrome?
Neck pain associated with lower extremity weakness, gait or coordination difficulties and/or bladder or bowel dysfunction suggests possible cord compression or myelopathy
A shock like paresthesia occuring with neck flexion suggests compression of the cervical cord by a midline disc herniation or spondylosis but may also be a sign of intramedullary pathology such as MS
When one spinal fracture is present what else should you look for?
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When is a spinal fracture classified as stable or unstable
To assess the stability of cervical spinal column injuries below C2, the spine is viewed as consisting of 2 columns. The anterior column is formed by vertebral bodies and IV disc which are held in alignment by the anterior and posterior longitudinal ligament. The posterior column, which contains the spinal canal, is formed by the pedicles, transverse processes, articulating facets, laminae, and spinous processes. The nuchal ligament complex, capsular ligaments and ligamentum flavum hold the posterior column in alignment.
If both columns are disrupted, the cervical spine can move as 2 independent units and there is high risk of causing or exacerbating a spinal cord injury. In contrast, if only one column is disrupted and the other column maintains structural integrity, the risk of spinal cord injury is far less.
If a spinal fracture is suspected during history taken what action should be taken prior to proceeding with a clinical examiantion?
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What key information is required to assess for vascular insufficiency or carotid artery dissection
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What key information is required to assess dizziness
Most patients presenting with dizziness can be rapidly assessed and valid estimates can be made regarding diagnostic possibilities – thus informing management decisions.
Most of the uncertainty in dizziness presentations occurs when attempting to distinguish ‘peripheral’ from central causes. The key to distinguishing between these is understanding the 3 most common peripheral vestibular disorders (ie vestibular neuritis, BPPV and Meniere’s disease). Typically, the most effective way to ‘rule out’ a life-threatening central disorder is to ‘rule in’ a specific peripheral vestibular disorder.
What key information would you ask to differentiate cervicogenic headache from non-musculokskeletal causes in the ED setting?
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What key information is required in the setting of chronic neck pain problems in the ED?
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What key information in a patient’s past medical history is important in neck pain/injuries in the ED setting?
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What key information in a patient’s medication history is important in neck pain/injuries in the ED setting?
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what key information in a patient’s social history is important in neck pain/injuries in the ED setting.
Social support and cultural differences in expectations in pain may play a role in development of persistent pain.
What is the relevance of determining the first aid/pre hospital treatment?
First responders should be vigilant for spinal column injury in trauma patients. For any patient with a possible cervical spine injury, spinal immobilisation should be initiated at the scene.
Some form of cervical spine immobilisation and protection should be maintained until an unstable spinal injury is excluded using a validated assessment instrument or appropriate diagnostic imaging.
What is the relevance of determining the compensable status or health insurance status of the patient?
Financial compensation can be one of the factors that may affect symptom duration.
Routine physiotherapy subjective assessment of the cervical spine including upper cervical spine, 5Ds and VBI testing
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Dizziness subjective questioning
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Anatomy of the cervical spine
The spinal column includes 33 vertebraes: 7 cervical, 12 thoracic and 5 lumbar. The sacrum consists of 5 fused vertebrae and the coccyx. The 1st 2 cervical vertebrae are unique. The atlas is a ring like structure that articulates with the skull, where it is responsible for 50% of the neck’s ability to flex and extend. The odontoid process of the axis is secured to the anterior portion of the atlas and allows rotation.
The vertebral bodies gradually increase in size as they descend. The posterior arch encases the spinal cord and consists of broad pedicles, flat laminae and the spinal process. The transverse processes extend laterally near the junction of the pedicle and laminae. The posterior arch has 4 facets that articulate with the superior and inferior vertebrae forming synovial joints. Depending on their location, the transverse processes articulate with the ribs.
The ligaments of the spine include the anterior and posterior longitudinal ligaments that interconnect the vertebral bodies and run the length of the spine. Posteriorly, the ligamentum flavum, interspinous ligament, and supraspinous ligament provide stability.
Anatomy of the nervous system including spinal cord, nerve roots, brachial plexus, peripheral nerves
The spinal canal and cord are largest in the cervical region. In the thoracic spine, the spinal canal is very narrow and therefore, small displacement can lead to significant neurological injury.
There are 8 cervical spinal nerves, each arising from the spinal cord and consisting of a ventral and a dorsal root. The ventral root contains efferent fibres from alpha motor neurons in the ventral horn of the spinal cord. The dorsal horn carries primary sensory afferent fibres from cells in the dorsal root ganglion. Cervical radiculopathy may be caused by degenerative changes in the spine that affect the nerve root. The findings vary with the level of nerve root involvement
The dorsal and ventral spinal roots combine to form the spinal nerve. This spinal nerve then divides into 2 branches, a dorsal primary ramus and a ventral primary ramus. The dorsal ramus innervates the muscular, cutaneous, and articular components of the posterior neck. The ventral ramus innervates the prevertebral and paravertebral muscles and forms the brachial plexus, which supplies the upper limb. A myotome is the group of muscles innervated by a spinal nerve.