Acute Care and Trauma (3) Flashcards
What is spinal cord injury also known as?
Acute cervical spine trauma: encompasses a wide range of potential injuries to ligaments, muscles, bones, and spinal cord that follow acute incidents (ranging from a seemingly innocuous fall to a high-energy motor vehicle accident)
How are patients with spinal cord injury managed?
All patients with suspected trauma should be assessed and stabilised using the Advanced Trauma Life Support protocol (A to E approach)
What are the risk factors for cervical spine injury?
- Age 18-25 (higher velocity injuries) or >65
- Dangerous mechanism of injury (fall from a height, an axial load to the head)
- Traumatic injuries
What are the features of a spinal cord injury?
- Concordant mechanism of injury in history
- Neck pain (cervical injuries)
- Reduced level of consciousness
- Paraesthesia in the limbs
- Motor weakness
- Sensory loss
- Bowel or bladder dysfunction
- Priapism (prolonged erection in men)
What is the first line investigation for spinal cord injury?
Urgent CT scan of the cervical spine
What test should be performed after a CT scan for spinal cord injuries if there is a neurological abnormality on examination?
MRI: this is regardless of whether there is an abnormality evident on CT scan
What is the management of spinal cord injuries following initial assessment and imaging?
Patients with clinical signs of a spinal cord injury (i.e. an abnormal neurological examination) should be referred to a neurosurgeon or a spinal surgeon
What is chronic spinal cord injury?
A term generally used when elements of a spinal cord injury have been present for at least 1 year
What is the aetiology of chronic spinal cord injury?
Can result from a variety of pathologies:
1. Acute mechanical trauma
2. Compression by a space-occupying lesion
3. Infection
4. Vascular insult
The injury may be exacerbated by ischaemia or inflammation
What are the common features of chronic spinal cord injury?
- Bladder and/or bowel dysfunction
- Pain (neurogenic and musculoskeletal)
- Gait disturbances
- Soft tissue contractures
- Sexual dysfunction
- Cardiovascular dysautonomia (including autonomic dysreflexia)
- Development and/or progression of long-term neurological complications e.g. syringomyelia
What is autonomic dysreflexia?
A clinical syndrome that occurs in patients who have had a spinal cord injury at or above T6 spinal level
What is the pathophysiology of autonomic dysreflexia?
- Afferent signals (most commonly triggered by faecal impaction or urinary retention) cause a sympathetic spinal reflex via a thoracocolumbar outflow
- The usual centrally mediated parasympathetic response is prevented (due to spinal cord injury)
- As a result there is an unbalance physiological response
What is the unbalanced physiological response characterised by in autonomic dysreflexia?
- Extreme hypertension
- Flushing and sweating above the level of the spinal cord lesion
- Agitation
What can develop in untreated, severe cases of autonomic dysreflexia?
Consequences of extreme hypertension e.g. haemorrhagic stroke
What is the management of autonomic dysreflexia?
- Removal or control of the stimulus
- Treatment of any life-threatening hypertension and/or bradycardia
What are the investigations for chronic spinal cord injury?
- MRI spine
- EMG
- Urodynamic studies/ bladder ultrasound (if bladder dysfunction)
What is the management of chronic spinal cord injury?
- Intensive rehabilitation: optimise mobility and hand function
- Prevention of complications
- Bladder and bowel management
- Analgesia
What is the prognosis of spinal cord injuries?
- Full recovery of neurological function is unlikely
- Patients have a decreased life expectancy compared with the general population
What are the complications of chronic spinal cord injury?
- Dysphagia
- Venous thromboembolic conditions (DVT)
- Soft tissue and joint contractures
- Pressure injuries
- Orthostatic hypotension
- Low bone mass or oestopenia/osteoporosis
What conditions result in motor only lesions of the spinal cord?
- Amyotrophic lateral sclerosis (ALS)/ MND: both upper and motor neurones
- Poliomyelitis: affects anterior horns resulting in lower motor neurone signs
What conditions result in a combined motor and sensory spinal cord lesion?
- Brown-Sequard syndrome
- Subacute combined degeneration of the spinal cord (Vit B12 and E deficiency)
- Friedrich’s ataxia
- Anterior spinal artery occlusion
- Syringomyelia
- Multiple sclerosis
What condition results in only sensory spinal cord lesions?
Neurosyphilis
What are some of the different diseases that affect the vertebral column?
- Ankylosing spondylitis
- Scheuermann’s disease
- Scoliosis
- Spina bifida
- Spondylolysis
- Spondylolisthesis
What are the main causes of spinal/ vertebral fracture?
- Osteoporotic vertebral fracture
- Trauma
- Stress fractures (caused by repetitive force often from overuse: can lead to spondylolisthesis
What are osteoporotic fractures in the spine (vertebra)?
- Fragility fractures from osteoporosis
- Osteoporosis is where bone gradually decreases in bone mineral density
- Fragility fractures: fractures that occur as a result of mechanical forces that would not usually lead to a fracture
What are the risk factors for osteoporotic fractures?
- Advancing age (major RF)
- Previous history of a fragility fracture
- Frequent or prolonged use of glucocorticoids
- History of falls
- FH of hip fracture
- Alternative causes to secondary osteoporosis e.g. Cushing’s, hyperthyroidism, CKD
- Low BMI
- High alcohol intake
What is the epidemiology of osteoporotic fractures?
- Osteoporosis is far more common in women
- One of the most common sites of osteoporotic fractures is the spine
- The prevalence of vertebral osteoporotic fractures is difficult to determine, as not all patients present to a clinician and fractures may not always be clearly identifiable on X-ray
What are the presenting symptoms of an osteoporotic fracture?
- Asymptomatic: may be diganosed through an incidental finding on an x-ray
- Acute back pain
- Breathing difficulties: change in shape and length of vertebrae can lead to compression of organs including lungs
- Gastrointestinal problems
- Minority of patients will have a history of a fall/ trauma
What are the signs of an osteoporotic fracture of examination?
- Loss of height: compression of the spinal vertebrae therefore a reduction in overall length of the spine
- Kyphosis: curvature of the spine
- Localised tenderness on palpation of the spinous processes at the fracture site
What is the first line investigation for osteoporotic fractures?
X-ray of the spine: may show wedging of the vertebra due to compression of the bone (may also show old fractures - sclerotic appearance)
What are some of the other investigations for osteoporotic fractures?
- CT spine: more detailed view of the bone structure, therefore can visualise the extent/features of the fracture more clearly
- MRI spine: Useful for differentiating osteoporotic fractures from those caused by another pathology e.g. a tumour
What is the management of osteoporotic fractures?
- Pain relief
- Temporary use of an orthosis (e.g., Jewett/Lumbar brace or thoracolumbosacral orthosis)
- Walking aids (e.g., stick, elbow crutches, all-terrain rollator)
- Follow up (every 6 weeks for 3 months after injury)
What is important in osteoporotic fractures?
- The stability of the spine is not compromised with this type of fracture
- These fractures are traditionally considered benign injuries that heal without complications
What should be carried out to assess the risk of future fractures following an osteoporotic fracture?
- Risk factors are taken into account and a dual-energy X-ray absorptiometry (DEXA) scan should be performed
- According to NICE, the FRAX tool or QFracture tool can be used to estimate the 10-year risk of a fracture
What is spondylolisthesis?
When one vertebra is displaced relative to its immediate inferior vertebral body
What will traumatic spondylolisthesis show on plain x-ray of the spine?
‘Scotty Dog’ appearance
What is the management of spondylolisthesis?
- Depends upon the extent of deformity and associated neurological symptoms
- Minor cases may be actively monitored
- Individuals with radicular symptoms or signs will usually require spinal decompression and stabilisation
What is spinal cord compression?
EMERGENCY
What are the features of spinal cord compression?
- Back pain (earliest and most common): may be worse on lying down and coughing
- Lower limb weakness
- Sensory changes: loss and numbness
- Neurological signs depend on level of lesion
What are the neurological signs of spinal cord compression?
- Depend on level of lesion:
a. Above L1: usually result in UMN signs in the legs and sensory level
b. Below L1: usually cause LMN signs in the legs and perianal numbness - Tendon reflexes tend to be increased below the level of the lesion and absent at the level of the lesion
What is the investigation of choice for spinal cord compression?
Urgent MRI: whole MRI of spine within 24 hours of presentation
What is the management of spinal cord compression?
- High dose oral dexamethasone
- Urgent oncological assessment: extradural compression accounts for the majority of cases, usually due to vertebral body metastases, patient may need surgery or radiotherapy
What are the common cancers which can lead to neoplastic spinal cord compression?
Lung, breast and prostate cancer (usually extradural compression from vertebral body metastases)
What is cauda equina syndrome?
Rare but serious condition in which the lumbosacral nerve roots that extend below the spinal cord are compressed
In which patients should cauda equina syndrome be considered in?
Any patient who presents with new/worsening back pain
What is the main concern with cauda equina syndrome?
Late diagnosis may lead to permanent nerve damage resulting in long term leg weakness and urinary/bowel incontinence
What are the main causes of cauda equina syndrome?
- Most common cause: central disc prolapse (L4/5 or L5/S1)
- Tumour: primary or metastatic
- Infection: abscess, discitis
- Trauma
- Haematoma
What are some of the possible features of cauda equina syndrome?
- Low back pain
- Bilateral sciatica (50% of cases)
- Reduced sensation/ pins and needles in the perianal area
- Decreased anal tone (should check this in patients with new onset back pain)
- Urinary dysfunction e.g. incontinence (this is a late sign and may indicate irreversible damage)
What is the investigation of choice for cauda equina syndrome?
Urgent MRI
What is the management of cauda equina syndrome?
Surgical decompression
What is a stroke?
- The rapid permanent neurological deficit from cerebrovascular insult
- Also defined clinically, as focal or global impairment of CNS function developing rapidly and lasting >24 h
What can stroke be divided into?
- Ischaemic: caused by vascular occlusion or stenosis
- Haemorrhage: caused by vascular rupture, resulting in intraparenchymal and/or subarachnoid haemorrhage
What is the most common type of stroke?
Ischaemic (85%)