Med Surg - Exam 2 - Ch 58 (Stroke) Flashcards
Of the following patients, the nurse recognizes that the one with the highest risk for a stroke is a(n)
a. obese 45-year-old Native American.
b. 35-year-old Asian American woman who smokes.
c. 32-year-old white woman taking oral contraceptives.
d. 65-year-old African American man with hypertension.
d. 65-year-old African American man with hypertension.
Nonmodifiable risk factors for stroke include age (older than 65 years), male gender, ethnicity or race (incidence is highest in African Americans; next highest in Hispanics, Native Americans/Alaska Natives, and Asian Americans; and next highest in white people), and family history of stroke or personal history of a transient ischemic attack or stroke. Modifiable risk factors for stroke include hypertension (most important), heart disease (especially atrial fibrillation), smoking, excessive alcohol consumption (causes hypertension), abdominal obesity, sleep apnea, metabolic syndrome, lack of physical exercise, poor diet (high in saturated fat and low in fruits and vegetables), and drug abuse (especially cocaine). Other risk factors for stroke include a diagnosis of diabetes mellitus, increased serum levels of cholesterol, birth control pills (high levels of progestin and estrogen), history of migraine headaches, inflammatory conditions, hyperhomocystinemia, and sickle cell disease.
A thrombus that develops in a cerebral artery does not always cause a loss of neurologic function because
a. the body can dissolve atherosclerotic plaques as they form.
b. some tissues of the brain do not require constant blood supply to prevent damage.
c. circulation via the circle of Willis may provide blood supply to the affected area of the brain.
d. neurologic deficits occur only when major arteries are occluded by thrombus formation around atherosclerotic plaque.
c. circulation via the circle of Willis may provide blood supply to the affected area of the brain.
The communication between the anterior and posterior cerebral circulation in the circle of Willis provides a collateral circulation, which may maintain circulation to an area of the brain if its original blood supply is obstructed. All areas of the brain require constant blood supply and atherosclerotic plaques are not readily reversed. Neurologic deficits can result from ischemia caused by many factors.
A patient comes to the emergency department immediately after experiencing numbness of the face and an inability to speak but while the patient awaits examination, the symptoms disappear and the patient requests discharge. Why should the nurse emphasize that it is important for the patient to be treated before leaving?
a. The patient has probably experienced an asymptomatic lacunar stroke.
b. The symptoms are likely to return and progress to worsening neurological deficit in the next 24 hours.
c. Neurologic deficits that are transient occur most often as a result of small hemorrhages that clot off.
d. The patient has probably experienced a transient ischemic attack (TIA), which is a sign of progressive cerebrovascular disease.
d. The patient has probably experienced a transient ischemic attack (TIA), which is a sign of progressive cerebrovascular disease.
What are the characteristics of a stroke caused by an intracerebral hemorrhage (select all that apply)?
a. Carries a poor prognosis
b. Caused by rupture of a vessel
c. Strong association with hypertension
d. Commonly occurs during or after sleep
e. Creates a mass that compresses the brain
a. Carries a poor prognosis
b. Caused by rupture of a vessel
e. Creates a mass that compresses the brain
Strokes from intracerebral hemorrhage have a poor prognosis, are caused by the rupture of a blood vessel, are frequently atherosclerotic, and create a mass that compresses the brain. Thrombotic strokes are related to hypertension and occur during sleep or after sleep.
Which type of stroke is associated with endocardial disorders, has a rapid onset, and is unrelated to activity?
a. Embolic
b. Thrombotic
c. Intracerebral hemorrhage
d. Subarachnoid hemorrhage
a. Embolic
Embolic strokes are associated with endocardial disorders such as atrial fibrillation, have a rapid onset, and are unrelated to activity.
Indicate whether the following manifestations of a stroke are more likely to occur with right brain damage (R) or left brain damage (L).
___ a. Aphasia
___ b. Impaired judgment
___ c. Quick, impulsive behavior
___ d. Inability to remember words
___ e. Left homonymous hemianopsia
___ f. Neglect of the left side of the body
___ g. Hemiplegia of the right side of the body
L a. Aphasia
R b. Impaired judgment
R c. Quick, impulsive behavior
L d. Inability to remember words
R e. Left homonymous hemianopsia
R f. Neglect of the left side of the body
L g. Hemiplegia of the right side of the body
The patient has a lack of comprehension of both verbal and written language. Which type of communication difficulty does this patient have?
a. Dysarthria
b. Fluent dysphasia
c. Receptive aphasia
d. Expressive aphasia
c. Receptive aphasia
Receptive aphasia is the lack of comprehension of both verbal and written language. Dysarthia is a disturbance in muscular control of speech. In fluent dysphagia speech is present but contains little meaningful communication. Expressive aphasia is the loss of the production of language.
A patient is admitted to the hospital with a left hemiplegia. To determine the size and location and to ascertain whether a stroke is ischemic or hemorrhagic, the nurse anticipates that the health care provider will request a
a. lumbar puncture.
b. cerebral arteriogram.
c. magnetic resonance imaging (MRI).
d. computed tomography (CT) scan with contrast.
c. magnetic resonance imaging (MRI).
MRI could be used to rapidly distinguish between ischemic and hemorrhagic stroke and determine the size and location of the lesion. A noncontrast CT scan could also be used. Lumbar punctures are not performed routinely because of the chance of ICP causing herniation. Cerebral arteriograms are invasive and may dislodge an embolism or cause further hemorrhage. They are performed only when no other test can provide the needed information.
A carotid endarterectomy is being considered as treatment for a patient who has had several TIAs. What should the nurse explain to the patient about this surgery?
a. It involves intracranial surgery to join a superficial extracranial artery to an intracranial artery.
b. It is used to restore blood circulation to the brain following an obstruction of a cerebral artery.
c. It involves removing an atherosclerotic plaque in the carotid artery to prevent an impending stroke.
d. It is used to open a stenosis in a carotid artery with a balloon and stent to restore cerebral circulation.
c. It involves removing an atherosclerotic plaque in the carotid artery to prevent an impending stroke.
A carotid endarterectomy is the removal of an atherosclerotic plaque in the carotid arteries that may impair circulation enough to cause a stroke.
What primarily determines the neurologic functions that are affected by a stroke?
a. The amount of tissue area involved
b. The rapidity of the onset of symptoms
c. The brain area perfused by the affected artery
d. The presence of absence of collateral circulation
c. The brain area perfused by the affected artery
Clinical manifestations of altered neurologic function differ, depending primarily on the specific cerebral artery involved and the area of the brain that is perfused by the artery. The degree of impairment depends on rapidity of onset, the size of the lesion, and the presence of collateral circulation.
The incidence of ischemic stroke in patients with TIAs and other risk factors is reduced with the administration of which medication?
a. Furosemide (Lasix)
b. Lovastatin (Mevacor)
c. Daily low-dose aspirin
d. Nimodipine (Nimotop)
c. Daily low-dose aspirin
What is the priority intervention in the emergency department for the patient with a stroke?
a. Intravenous fluid replacement
b. Administration of osmotic diuretics to reduce cerebral edema
c. Initiation of hypothermia to decrease the oxygen needs of the brain
d. Maintenance of respiratory function with patent airway and oxygen administration
d. Maintenance of respiratory function with patent airway and oxygen administration
During the acute phase of a stroke, the nurse assesses the patient’s vital signs and neurologic status every 4 hours. What is a cardiovascular sign that the nurse would see as the body attempts to increase blood flow?
a. Hypertension
b. Fluid overload
c. Cardiac dysrhythmias
d. S3 and S4 heart sounds
a. Hypertension
During the secondary assessment of the patient with a stroke, what all should be included (select all that apply)?
a. Gaze
b. Sensation
c. Facial palsy
d. Proprioception
e. Current medications
f. Distal motor function
a. Gaze
b. Sensation
c. Facial palsy
d. Proprioception
f. Distal motor function
A diagnosis of a ruptured cerebral aneurysm has been made in a patient with manifestations of a stroke. The nurse anticipates which treatment option that would be considered for the patient?
a. Hyperventilation therapy
b. Surgical clipping of the aneurysm
c. Administration of hyperosmotic agents
d. Administration of thrombolytic therapy
b. Surgical clipping of the aneurysm