Multi-System Trauma Part 1 Flashcards
Spinal Cord Injuries, Care of the Emergency Patient beside bites
Spinal Cord Injury cells do / do not regenerate
DO NOT regenerate
Spinal Cord Injury results from
trauma
- partial or complete damage to the spinal cord
SCI is the
degenerative loss of motor, sensory and autonomic function
What happens during SCI to the cells?
Apoptosis (programmed cell death)
- days to months after initial injury
- **sudden reoval of survival signals or disassociation from neighboring cells
T/F: SPINAL SHOCK is a true shock.
False
What can not be regained after a SCI?
central nervous system function
What 2 factors cause the SCI to excel
Edema secondary to inflammatory response is harmful because of lack of space for tissue expansion
Edema and inflammation of SCI result in
compression of cord and extension of edema above and below injury increase ischemic damage
The extent of injury and prognosis for recovery most accurately determined
at least 72 hours or more after injury
- up to 1 year after
Spinal Shock is
Temporary neurologic syndrome
Spinal Shock characterized by
loss of deep tendon and sphincter reflexes, loss of sensation, and flaccid paralysis below the level of injury.
Spinal shock masks
postinjury neurologic function** can have more mvmt ability later than when they first come in
- resolved when you get the reflexes back
Neurogenic shock occur where in the spine
T6 and higher
Neurogenic Shock occurs from
unopposed parasympathetic response due to loss of sympathetic nervous system (SNS) innervation
Neurogenic shock causes
peripheral vasodilation, venous pooling, and decreased cardiac output
Neurogenic shock s/s
significant hypotension (< 90 mmHg), bradycardia, and temperature dysregulation
- Warm and dry (PINK) due to blood in periphery
Neurogenic shock lasts
1-3 weeks
Neurogenic shock’s hypotension can cause
poor perfusion and oxygenation to the spinal cord and worsen spinal cord ischemia
Neurogenic shock is what type of problem
pipe problem
- vessel vasodilate into periphery
- low HR and BP
- no resistance
What can you do to determine if it is a neurogenic shock issue?
500 -1000mL OF FLUID if it does not work then you know it is neurogenic shock then give vasopressors but don’t drown them
What can you use to help the neurogenic shock pt with orders
TED hose, compression socks, SCD, belly binder and vasopressors
SCI is classified by the
(1) mechanism of injury, (2) level of injury, and
(3) degree of injury
Major mechanisms of SCI
flexion, flexion-rotation, hyperextension, vertical compression, extension-rotation, and lateral flexion
Flexion-rotation injury is the
most unstable because ligaments that stabilize the spine are torn. This injury most often contributes to severe neurologic deficits
Flexion injury of the cervical spine ruptures the
posterior ligaments
Hyperextension injury of the cervical spine ruptures the
anterior ligaments
Compression fractures
crush the vertebrae and force bony fragments into the spinal canal
Flexion-rotation injury of the cervical spine often results in
cervical spine often results in tearing of ligamentous structures that normally stabilize the spine - spinning car crash
In a MVA what should check first for a fx of the spinal column
Calcaneus heal bone as it is the “toughest” in the body
Skeletal level of injury
vertebral level where there is most damage to vertebral bones and ligaments
Neurologic level of injury
Lowest segment of spinal cord with normal sensory and motor function on both sides of the body
What injuries are most common in the spine?
cervical and lumbar
- greatest flexibility and mvmt
If the cervical cord is involved then paralysis
all four extremities occurs, resulting intetraplegia(formerly termedquadriplegia).
The lower the level of injury to the spine,
the more function is retained in the arms
If the thoracic, lumbar, or sacral spinal cord is damaged, the result
paraplegia(paralysis and loss of sensation in the legs).
C4 injury
tetraplegia
complete paralysis below the neck
C6 injury
partial paralysis of hands and arms and lower body
- tetraplegia
T6 injury
paraplegia
= paralysis below the waist
L1 injury
paraplegia
Which is shorter the spinal cord or the vertebral column?
spinal cord
Cervical vertebrae
7
Thoracic vertebrae
12
Lumbar vertebrae
5
Sacral vertebrae
5
Cervical cord
first cervical vertebra (the atlas) and the second cervical vertebra (the axis
Complete cord involvement injury
(decapitation – internal, GSW, stab, penetrating all the way across)
= Results in total loss of sensory and motor function below level of lesion (injury)
Incomplete (partial) cord involvement
Results in
Results in a mixed loss of voluntary motor activity and sensation and leaves some tracts intact
What is associated with incomplete injuries?
central cord syndrome, anterior cord syndrome, Brown-Séquard syndrome
Central cord syndrome damage to
Damage to central spinal cord
Central cord syndrome occurs most commonly in
cervical cord region
Central cord syndrome s/s
Motor weakness and sensory loss are present in both upper and lower extremities
- bone abnormality
- lower not affected
- burning pain in upper
- cant bear own weight
Central cord syndrome loss in
Greater loss in arms than in legs
Central cord syndrome is common in
older adults
Farmers
Does central cord syndrome last forever?
no, rehab can help them walk again with arm or leg braces sometimes
not able to feed themselves or button a shirt
Brown-Séquard syndrome damage to
one half of spinal cord
Brown-Séquard syndrome characterized by
loss of motor function and position and vibration sense on same side of injury
Paralysis on the same side as lesion
Opposite side has loss of pain and temperature sensation below level of lesion
Brown-Séquard syndrome caused by
penetrating injury to spinal cord
Proprioception
I cant tell you wear my arms are or how they look when not in my view (position)
Higher the injury, the
more serious the sequelae
- Proximity of cervical cord to medulla and brainstem
Patient with an incomplete lesion may demonstrate a
mixture of symptoms
S/S of SCI
direct result of trauma that causes cord compression, ischemia, edema, and possible cord transection.
Sequalae – 2nd things = complications
pneumonia, bed sores,
Priority to take care of in SCI
atelectasis = partial portion = IS, forced FiO2 if unable on their own, turn, suction, cough out
SCI S/S - respiratory system
C1-3
Apnea, inability to cough
Need intubation quickly
SCI S/S - respiratory system
C4
Poor cough, diaphragmatic breathing, hypoventilation
Assisted cough
SCI S/S - respiratory system
C5-6
↓ Respiratory reserve
Teaching
The most likely cause of death when a spinal cord injury occurs
respiratory arrest
Above C3 Loss of
phrenic nerve function
SCI @ C4-C5 loss
loss of diaphragmatic innervation
Spinal cord edema and hemorrhage can affect function of phrenic nerve and cause respiratory insufficiency
Hypoventilation almost always occurs with diaphragmatic breathing
SCI Between C6-T8 loss of
intercostals
Presents special problems because of total loss of respiratory muscle function
Mechanical ventilation is required to keep patient alive
Artificial airways have an increase of
direct access for pathogens
Important to ↓ infections
Pulmonary edema may occur in response
fluid overload
Forced assisted cough –
lay flat on their back then place hands under their diaphragm, when they take try to cough then press to help them to cough
SCI S/S - CV system
Above level T6 reduce influence of the sympathetic nervous system
Heart rate is slow (<60 beats per minute) because of unopposed vagal response
- DECREASE VAGAL STIM.
SCI Bradycardia tx
Vasopressors and IV fluids, atropine – temporary, pacemaker