Stroke Management

Topics: Blood pressure, Stroke, Hypertension Pages: 6 (1704 words) Published: September 11, 2008
Outline your priorities of care for Martin on his arrival in the emergency department at your major metropolitan hospital. Kirkness explains that priority should be given to airway management and oxygenation. Generally, all patients should be placed on oxygen. The head of the bed should be slightly elevated, and a cardiac monitor and intravenous access established. Unless there is hypotension, fluids should be administered judiciously to prevent cerebral edema. 2 Primary assessments are focused on cardiac and respiratory status and neurological assessment. The nursing history is obtained as follows: 1) description of the current illness with attention to initial symptoms, including onset and duration, nature (intermittent or continuous) and changes. 2) History of similar symptoms previously experienced. 3) Current medications. 4) History of risk factors and other illnesses such as hypertension and 5) family history of stroke or cardiovascular disease (2000 p.1526).

Miller & Elmore explain the following guidelines for responding to a stroke;

Within 10 minute of arrival:
-Asses patient’s ABCs and vital signs
-Provide oxygen by nasal cannula
-Establish IV access
-Collect blood sample
-Perform a 12-lead electrocardiogram and attach patient to a cardiac monitor -Perform general neurological screening, including motor function, strength and equality

Within 25 minutes of arrival:
-Review patient’s history
-Establish the time of stroke onset
-Perform physical examination
-Determine patient’s level of consciousness using the Glasgow coma scale, and stroke severity

Smith, Johnston and Easton further add that clinical examination should be focused on the peripheral and cervical vascular system (carotid auscultation for bruits, blood pressure and pressure comparison between arms), the heart (dysrhythmia, murmurs), extremities (peripheral emboli), and retina. A neurological examination is performed to localise the site of the stroke, imaging study of the brain is nearly always performed and is requirement for patients being considered for thrombolysis.

Discuss your rationales for these orders.
MRI is currently preferred over CT for the diagnosis and localisation of ischemic stroke. Smith, Johnston, and Easton explain MRI has the potential for identifying a cerebral abnormality earlier and more clearly than other diagnostic tests. MRI uses a powerful magnetic field to obtain images of different areas of the body. Protons within the body align like small magnets in a magnetic field. In combination with radiofrequency pulses, the protons emit signals, which are converted to images. Wisselink & Panetta explain that with CT scanning, small hematomas, hemorrhagic infarcts, subarachnoid blood, clots surrounding aneurysms and arteriovenous malformations, shifts of the midline and deformities of the ventricles can be diagnosed. Acute ischemic stroke is usually not visualised with until frank infarct necrosis occurs, usually 15 to 30 hours after the initial insult. MRI demonstrates all of the above lesions, with the additional ability to image areas of hypoperfusion (eg, fresh ischemic infarctions).

Karch 2000 describes the therapeutic actions of mannitol. Elevates the osmolarity of the glomerular filtrate, thereby hindering the reabsorption of water leading to a loss of water, sodium, chloride; creates an osmotic gradient in the eye between plasma and ocular fluids, thereby reducing IOP; creates an osmotic effect, leading to decreased swelling in post-transurethral resection.

How would you explain the current understandings around this issue? Smith and Johnston et al explain a cautious approach to the management of elevated blood pressure is recommended in acute ischemic stroke. In general, frequent monitoring of blood pressure in hypertensive stroke is indicated and a persistent, severe hypertension (greater than 220 mm Hg systolic or more than 130 mm Hg mean arterial pressure) should be considered...
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