Neurologic Emergencies

Chapter 13

Brain Structure

The Spinal Cord

Common Causes of Brain Disorder

• Many different disorders can cause brain dysfunction and can affect LOC, speech, and muscle control.

• If problem is caused by heart and lungs, entire brain will be affected.

• If problem is in the brain, only that portion of brain will be affected.

• Stroke is a common cause of brain disorder and is treatable.

• Seizures and altered mental status are other causes of brain disorder.

Cerebrovascular Accident and Stroke

• Cerebrovascular accident– Interruption of blood flow to the brain that results

in the loss of brain function• Stroke– The loss of brain function that results from a CVA

Potential Results of a CVA

• Thrombosis—Clotting of cerebral arteries

• Arterial rupture— Rupture of a cerebral artery

• Cerebral embolism —Obstruction of a cerebral artery caused by a clot that was formed elsewhere and traveled to the brain

Hemorrhagic Stroke

• Results from bleeding in the brain

• High blood pressure is a risk factor.

• Some people are born with aneurysms

Ischemic Stroke

• Results when blood flow to a particular part of the brain is cut off by a blockage inside a blood vessel

Atherosclerosis

• Atherosclerosis is a condition in which fatty material collects along the walls of arteries. This fatty material thickens, hardens (forms calcium deposits), and may eventually block the arteries

Transient Ischemic Attack (TIA)

• A TIA is a “mini-stroke.”

• Stroke symptoms go away within 24 hours.

• Every TIA is an emergency.

• TIA may be a warning sign of a larger stroke.

• Patients with possible TIA should be evaluated by a physician.

Signs and Symptoms of Stroke

• Left hemisphere– Aphasia: Inability to speak or understand speech– Receptive aphasia: Ability to speak, but unable to

understand speech– Expressive aphasia: Inability to speak correctly,

but able to understand speech• Right hemisphere– Dysarthria: Able to understand, but hard to be

understood

Stroke Mimics

• Hypoglycemia

• Postictal state

• Subdural or epidural bleeding

You Are The Provider

• You and your paramedic partner arrive to a 70-year-old man with a severe headache and decreased level of consciousness.

• He is seated in the kitchen with his wife standing next to him.

• When you speak to him, he stares at you blankly.

• You notice that he is drooling from the right side of his mouth.

• His wife says, “A few minutes ago, he told me that he had a very bad headache.”

• “When I came back from the bathroom with some ibuprofen, I tried to hand him a glass of water and he dropped the glass on the floor. I don’t know what’s wrong with him.”

Continued…

• What do you suspect is wrong with this patient?

• What other signs and symptoms would you suspect in this scenario?

• What tests could you use to verify your suspicions?

Scene Size up:

• Scene safety remains a priority. • Ensure that needed resources are requested.• Consider spinal immobilization.• Be aware that many serious medical

conditions can mimic stroke; consider all possibilities.

Initial Assessment

• Chief complaint may include confusion, slurred speech, or unresponsiveness.

• Patient may have difficulty swallowing or choke on own saliva.

• Ensure adequate airway.• If unresponsive, place in recovery position.• Administer oxygen.• Raising patient’s arms and legs may aggravate

hemorrhage.

You are the Provider

• You utilize a portion of the Cincinnati Stroke Scale by asking the patient to smile.

• He attempts, but the right side of his face remains flaccid.

• You assist the patient to the cot and place him upright, slightly on his affected side.

• As you obtain a quick set of baseline vital signs, your partner applies high-flow oxygen.

Transport Decision

• Thrombolytics may reverse stroke symptoms or stop a stroke if given within 2 to 3 hours of onset.

• Spend as little time on scene as possible.

• Place paralyzed side down and well protected with padding.

• Elevate head approximately 6".

Focused History and Physical Exam

• Quickly determine when patient last appeared normal.

• Medications may give you a clue to the patient’s past medical history.

• Patient may still be able to hear and understand; be careful what you say.

Cincinnati Stroke Scale

• Speech– Abnormal if words are slurred or confused

• Facial droop– Abnormal if asymmetrical

• Arm drift– Abnormal if arms do not move equally

Baseline Vital Signs

• Excessive bleeding in the brain may slow pulse and cause erratic respirations.

• Blood pressure is usually high.• Excessive bleeding in the brain may cause

changes in pupil size and reactivity.

Interventions

• Based on assessment findings• If the patient is unresponsive, you may

consider the recovery position to protect the airway.

Detailed Physical Exam

• Perform when time and conditions permit.• Generally performed en route to the hospital.• Do not delay transport, especially due to the

time sensitivity of stroke treatment.

Ongoing Assessment

• Reassess ABCs, interventions, vital signs.• Stroke patients can lose airway without

warning.• Watch for changes in GCS scores.• Relay information to the hospital as soon as

possible.• Report any pertinent physical findings,

Cincinnati Stroke Scale, GCS score, any other changes.

Emergency Care for Stroke

• Patient needs to be evaluated by computed tomography (CT).

• Recognizing the signs and symptoms of stroke can shorten the delay to CT.

• Treatment needs to start as soon as possible, within 3 to 6 hours of onset.

Seizures

• Generalized (grand mal) seizure– Unconsciousness and generalized severe twitching

of the body’s muscles that lasts several minutes

• Absence (petit mal) seizure– Seizure characterized by a brief lapse of attention

Signs and Symptoms of Seizures

• Seizures may occur on one side or gradually progress to a generalized seizure.

• Usually last 3 to 5 minutes and are followed by postictal state

• Patient may experience an aura.

• Seizures recurring every few minutes are known as status epilepticus.

Causes of Seizures

• Congenital (epilepsy)• High fevers• Structural problems in the brain• Metabolic disorders• Chemical disorders (poison, drugs)• Sudden high fever

Recognizing Seizures

• Cyanosis• Abnormal breathing• Possible head injury• Loss of bowel and bladder control• Severe muscle twitching• Postseizure state of unresponsiveness with

deep and labored respirations

Postictal State

• Patient may have labored breathing.• May have hemiparesis: weakness on one side

of the body.• Patient may be lethargic, confused, or

combative.• Consider underlying conditions:– Hypoglycemia– Infection

Scene Size Up

• Spinal immobilization may be needed with a seizure.

• Ensure that scene is safe and wear BSI.

• Request ALS assistance earlier rather than later

Initial Assessment

• Most seizures last only a few minutes at most.

• Assess level of consciousness.

• Use AVPU scale to determine how well patient is progressing through postictal stage.

• Focus on ABCs upon arrival.

• Expect pulse to be rapid and deep.

• Pulse should slow to normal rates after several minutes.

Transport Decision

• It is difficult to package a seizing patient for transport.

• Treat ABCs while waiting for seizure to finish.• Protect the seizing patient from his or her

surroundings. • Never restrain an actively seizing patient.• Not every patient who has a seizure wishes to

be transported.• Encourage every patient to be seen and

evaluated in the emergency department.

Focused History and Physical Exam

• Obtain some information from family or bystanders.

• Observe patient for recurrent seizures.• If the patient displays an altered mental

status, perform a rapid physical exam. • If patient is responsive, begin with SAMPLE

history.• If the patient has an altered mental status,

utilize the Glasgow Coma Scale.

Interventions

• Most seizures will be over by the time you arrive.

• Treat trauma as you would for any other patient.

• For patients who continue to seize, suction the airway according to local protocol, provide positive pressure ventilation, transport quickly to hospital.

• Consider rendezvous with ALS, who have medications to stop prolonged seizures.

Detailed Physical Exam

• If life threats are treated, consider performing detailed physical exam.

• Check patient for injuries, including tongue.• Assess for weakness or loss of sensation on

one side of body.

Ongoing Assessment

• Note additional seizure activity.• Reassess ABCs, interventions, vital signs.• Provide complete history to receiving facility.• Include descriptions of seizure from witnesses

if available.• Document whether this is first seizure or

whether patient has history of seizures.

Emergency Medical Care for Seizure

• Most patients should be evaluated by a physician after a seizure.

• With severe injury, suspect spinal injury.• Attempt to lower body temperature if febrile

seizure.• Patient and family may be frightened.

Altered Mental Status• Hypoglycemia

• Hypoxemia

• Intoxication

• Drug overdose

• Unrecognized head injury

• Brain infection

• Body temperature abnormalities

• Brain tumors

• Glandular abnormalities

• Poisoning

Assessing a Patient With AMS

• Same assessment process• Patient cannot tell you

reliably what is wrong.• Be vigilant in ongoing

assessment.• Monitor for changes or

deterioration.• Provide prompt transport

to hospital while monitoring the patient.