IDPH EMS Region Five - SSM Health...CVA Management Circulation Check blood glucose level...
Transcript of IDPH EMS Region Five - SSM Health...CVA Management Circulation Check blood glucose level...
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IDPH EMS Region Five
Stroke Education
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Time is Brain!!!!!
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Time is Brain !!!!
Stroke refers to any spontaneous damage to the brain
caused by an abnormality of the blood supply by
means of a clot or bleed.
Strokes should be treated emergently.
During a stroke, up to 2 million brain cells die every
minute. For every hour a stroke continues, up to 200
million nerve cells die and the brain ages 4 years.
Intravenous tPA (Activase / alteplase) should be given
within 180 minutes of the onset of ischemic stroke, so
do not delay transport and minimize scene time. It is
recommended to limit scene time to 10 minutes.
TIME IS BRAIN!
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Cerebrovascular Accident (CVA)
Pathophysiology
Thrombosis (brain itself)
Embolus (head, neck or heart)
Hemorrhage (within brain)
Ischemia (systemic blood flow)
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Predisposing Factors: Modifiable
Hypertension
Cigarette smoking
Diabetes Mellitus
Heart disease
Hyperlipidemia
Cardiovascular
disease
Chronic atrial
fibrillation
Sickle cell disease
Polycythemia
Hypercoagulability
Birth control pill use
Cocaine use
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Predisposing Factors: Unmodifiable
Age
Gender
Race
Prior stroke
Heredity
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CVA Mechanisms
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Thrombus
Embolus
Aneurysm
Arrhythmia
Hypovolemia
CVA Origin
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Ischemic Stroke
Blood vessel occlusion
Thrombosis
Embolism
Plaque fragments from carotids
Chronic atrial fibrillation
Fat particles
IV substance abuse particulates
Systemic hypoperfusion
Pump failure
Hypovolemia
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Ischemic Stroke Syndromes
Transient Ischemic Attack (TIA)
Neurological deficits that resolve in 24
hours or less (most in 30 minutes)
Commonly result from carotid artery
disease
Same symptoms as CVA
Often warning sign of impeding CVA
5% risk of stroke per year
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Ischemic Stroke Syndromes
Dominant Hemisphere Infarction
Contralateral weakness, numbness
Contralateral blurring of vision of half the
visual field in both eyes
Difficulty pronouncing words (dysarthria)
Difficulty speaking or understanding speech
(dysphasia or aphasia)
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Ischemic Stroke Syndromes
Nondominant Hemisphere Infarction
Contralateral weakness, numbness
Contralateral visual field cut
Neglect of contralateral extremities
Dysarthria
Usually NOT dysphasic or aphasic
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Hemorrhagic Stroke
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Hemorrhagic Stroke Syndromes
Intracerebral Hemorrhage
Headache, nausea, vomiting precede
deficits
Patients commonly have decreased LOC
with extreme hypertension
Contralateral hemiplegia, hemianesthesia
Possible aphasia, extremity neglect
depending on hemisphere involved
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Hemorrhagic Stroke Syndromes
Subarachnoid Hemorrhage Grade I Asymptomatic or mild headache and mild
nuchal rigidity
Grade II Moderate to severe headache, nuchal
rigidity, cranial nerve dysfunction but no
other deficits
Grade III Drowsiness, confusion, mild focal deficits
Grade IV Stupor, moderate to severe hemiparesis,
possibly early decerebrate rigidity,
vegetative response
Grade V Deep coma, decerebrate rigidity,
moribund appearance
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CVA Presentation Brain can show injury in only three ways:
Decreased LOC
Seizures
Localizing signs
Hemiparesis or hemiplegia
Dysphasia (Receptive or expressive)
Visual disturbances
Gait disturbances
Inappropriate affect
Bizarre behavior
Incontinence
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Cincinnati Stroke Scale
To facilitate accuracy in diagnosing stroke and
to expedite transport, a rapid neurological
examination tool is recommended.
The most common prehospital exam used is
the Cincinnati Stroke Scale (CSS).
One new onset positive sign on the CSS
indicates a 72% probability of stroke. Three
new onset positive signs on the CSS indicates
a greater than 85% probability of stroke.
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Cincinnati Stroke Scale:
Facial Droop (ask the patient to show their
teeth or smile)
Normal – Both sides of the face move
equally/symmetrically.
Abnormal – One side of the face does
not move as well as the other.
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Cincinnati Stroke Scale:
Arm Drift (ask the patient to close their
eyes and hold both arms out straight with
palms up for 10 seconds).
Normal – Both arms move the same.
Abnormal –One arm turns over, drifts
down compared to the other arm, or is
flaccid.
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Cincinnati Stroke Scale:
Speech (ask the patient to say, “You can’t
teach an old dog new tricks”)
Normal – The patient says the phrase
correctly with no slurring/slowing of
words.
Abnormal – The patient slurs words,
uses the wrong words or is unable to
speak.
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Cincinnati Stroke Scale:
Time (ask the patient/witness when the
symptoms started)
Time of Onset: the time symptoms
actually begin.
Last Known Well Time: the last time
the patient was known to be without
symptoms (asymptomatic).
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CRITICAL THINKING ELEMENTS:
CRITICAL THINKING ELEMENTS:
EMS personnel should ask family members or bystanders the stroke
symptom onset time if the patient is unable to provide that
information. Consider transporting a witness or obtaining witness’
contact information.
Maintain the head/neck in neutral alignment. Elevate the head of the
cot 30 degrees if the systolic BP is >100mmHg (this will facilitate
venous drainage and help reduce ICP).
Be alert for airway problems (swallowing difficulty,
vomiting/aspiration)
Bradycardia may be present in a suspected stroke patient due to
increased ICP. DO NOT give Atropine if the patient’s BP is normal or
elevated.
Spinal immobilization should be provided if the patient sustained a fall
or other trauma. Monitor and maintain the patient’s airway.
87% of strokes are ischemic and should be considered for tPA, while
13% of strokes are hemorrhagic.
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Assessment Signs & Symptoms
Ischemic S&S usually of slower onset
Hemiparesis or hemiplegia
Numbness or decreased sensation of face or
unilateral
Altered LOC or coma
Convulsions
Visual disturbances
Slurred or inappropriate speech
Headache or dizziness
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Assessment
Signs & Symptoms
Cerebral Embolus with rapid onset
Emboli from valvular HD or Afib
rapid onset
Often with an identifiable cause (e.g. Afib,
Valvular heart disease, recent long bone
fracture)
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Assessment
Signs & Symptoms
Cerebral hemorrhage associated with rapid
onset
high mortality rate
Often with severe HA (“Worst headache ever”)
N/V
Rapid decrease in LOC or seizure
Coma, Cushing’s and Herniation
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Assessment
Past Medical History
Associated Altered LOC or Seizure?
Onset/Precipitating factors?
Initial symptoms and progression? Dizziness, Severe HA, N/V
Previous CVA or TIA?
Previous neurological deficits?
Concomitant illnesses?
Sickle Cell Disease
Atrial fibrillation
Risk factors for stroke & thrombus formation?
BCP, Smoking
HTN, CVD
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Assessment Physical Exam
Mental Status & Behavior
Extremity Motor & Sensory
Gait
Pupils & Vision
Cincinnati Prehospital Stroke Scale
Evidence of Cushing’s Syndrome (Reflex)or
Herniation
Blood glucose level
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CVA Management
Basic Objective
Improve cerebral blood flow and
oxygenation
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CVA Management Airway
If no gag reflex, intubate
Otherwise, position to ensure drainage of
secretions
Suction as needed
Breathing
Oxygen via NRB
Ventilate with BVM and O2 if rate or tidal
volume inadequate
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CVA Management Circulation
Check blood glucose level
Hypoglycemia may mimic CVA
Treat hypoglycemia with D50W
Establish IV Access
Draw blood samples
TKO
avoid solutions with glucose (Hypertonic)
Monitor ECG
10% of CVAs are associated with cardiac event
12 Lead ECG if suspected ischemia
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CVA Management
Do not assume patient cannot
understand because they cannot talk
Position appropriately:
If hypertensive, semireclined (head slightly
elevated)
If normotensive, on affected side
If hypotensive, supine
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CVA Management
Increased Blood pressure treated ONLY
if strongly suggestive of ischemic stroke
If systolic >220 or diastolic >120 consider
gradual blood pressure reduction
Labetalol
Nitropaste
Nitroprusside
Controlled reduction
Return to pre-CVA levels, NOT to “normal”
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CVA Management
Thrombolytic agents
Consider for all patients with ischemic CVA
presenting within 3 hours of onset
Early recognition of ischemic stroke and
administration of thrombolytics can
prevent/limit loss of neurologic function
Requires CT scan!!!
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CVA Management Think like AMI of the Brain
Time is Muscle….. Time is Brain
Therapy Mainstays
Oxygenation/Ventilation
IV Access
Rapid assessment & differential
Treat associated conditions (hypoglycemia,
hypoxia, hypotension)
Rapid Transport to appropriate facility CT Scan & Thrombolytics vs. CT Scan & Neurosurgery
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Definitions
Primary Stroke Center (PSC) – a hospital that is currently
certified by The Joint Commission (TJC) or Healthcare
Facilities Accreditation Program (HFAP) as a Primary
Stroke Center.
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Definitions
Emergent Stroke Ready Hospital (ESRH) – a hospital which
provides emergency care with a commitment to Stroke with
recognition by Illinois Department of Public Health that has
the following capabilities:
CT availability with in-house technician availability
24/7/365
Lab availability 24/7/365
Ability to rapidly evaluate an acute stroke patient to
identify patients who would benefit from thrombolytic
administration
Ability and willingness to administer thrombolytic
agents to eligible acute Stroke patients
Accepts all patients regardless of bed availability
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Definitions
Non-Stroke Hospital – No recognized organized
treatment for acute stroke.
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INTERHOSPITAL TRANSPORT
GUIDELINES FOR CONFIRMED STROKE
PATIENTS
TPA (Activase / alteplase) Transfers
Patients with a tPA infusion in progress must be accompanied by
a Registered Nurse.
Patients that have completed a tPA infusion must be transported
by an ILS/ALS ambulance.
It is preferred to complete tPA before transferring patient.
Hemorrhagic Transfers
Keep head of cot elevated at least 30 degrees (if stable) and
head positioned midline.
Vital Signs and Neuro checks every 15 minutes
Notify Medical Control immediately of
SBP > 180 mmHg
DBP > 105 mmHg
Deterioration in level of consciousness
Bleeding at any location
Severe headache
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Time is Brain !!!!!!!