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NeuroMedical-Surgical Nursing-7th edition

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Page 14
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What tests are done to measure/determine brain death?
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Oculomotor reflex (Doll's eyes), Oculovestibular reflex (caloric test)
What is brain death?
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Irreversible loss of function; absence of responsiveness, brain stem reflexes and respiration.
What is a (+) caloric/ oculovestibular reflex test?
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Conjugate eye movements toward stimulus. *good
What is a (-) caloric/ oculovestibular reflex test?
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No eye movement. *bad
An ice calorics test shouldn't be done on someone with a _______ injury.
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tympanic membrane
What is an Ice calorics test?
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Measures CNS function. Warm or cold H2O is put into an ear.
What is an abnormal response in the Doll's Eyes/ oculomotor reflex?
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The eyes don't turn together.
What is a (-) Doll's eyes/ oculomotor reflex?
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A normal response. The eyes turn together to the side opposite the direction the head is turned.
What is a (+) Doll's eyes/ oculomotor reflex?
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An absent response, meaning the CNS is no longer intact.
The oculomotor reflex/ Doll's eyes indicates whether the _______ is intact. It should never be done on someone with a _______ injury.
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CNS; spinal cord
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This type of necrosis occurs in the glial cells of the brain. Commonly caused by staph, strep and e. coli. Tissue softens, liquefies and forms cysts.
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Liquefactive
Flexion of arms, wrists, and fingers with abduction in upper extremities...
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decorticate response; damage to the cerebrum.
All 4 extremities in rigid extension, with hyperpronation of forearms and plantar extension of the feet.
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Decerebrate, damage that is extensive (cerebrum).
The _______ response is indicative of more severe damage than the _______ response.
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Decerebrate than the decorticate
Mass above or within the cerebral hemisphere that creates downward pressure...
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Suptratentorium Herniation; occurs in the opening to the meninges in the tentorium.
What are the usual causes of an infratentorial herniation?
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Gunshot wounds, opiate OD, gunshot suicides.
The only brain injury that results in pinpoint pupils in the end stages is...
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an infratentorial herniation.
The 3rd cranial nerve can help determine which side of the brain has increased ICP. If the right eye is dilated, this means the increased ICP is on the...
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Right; does not cross over!
The 3rd cranial nerve is responsible for...
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pupil constriction
A person with an Uncal herniation has a dilated right eye. This means the herniation is on the _______ side.
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right
_______ herniation is the only one that results in bilateral pupil constriction.
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Infratentorial
  
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