Patho-Pharm Week 2 - CNS Flashcards
What is the Glasgow Coma Scale used for?
Measure a person’s level of consciousness after a head injury
What is anterograde amnesia?
When a person can’t remember what happened after their concussion (can’t form new memories)
What is retrograde amnesia?
When a person can’t remember what happened before their concussion
How are concussions diagnosed?
Via exclusion of other conditions
Differentiate decorticate and decerebrate
Decorticate - arms in on the chest
Decerebrate - arms out on sides
Is decorticate posture abnormal flexion or extension?
Flexion
Where is an Epidural Hematoma found?
Between the skull and the dura mater
What is the source/cause of an Epidural Hematoma?
Tear in an artery, forming a pocket of blood
What other injury is associated with an Epidural Hematoma?
Skull Fracture
Where is a Subdural Hematoma found?
Between the dura and the arachnoid mater
Where is a Subarachnoid Hemorrhage found?
Under the arachnoid mater
Do Subarachnoid Hemorrhages form pockets or fill a continuous space?
Fill a continuous space
How do Subarachnoid Hemorrhages create intracranial pressure in the brain?
It creates symmetrical intracranial pressure
As a nurse, what are the four key steps when treating someone with intracranial pressure?
- Lying done, head 45 degrees
- Hyperventilation
- Hypertonic saline IV
- Medications
How does hyperventilation help mediate intracranial pressure?
CO2 gets out, blood vessels constrict and get smaller, leaving more space inside the head
How does tilting someone’s head down to 45 degrees help with intracranial pressure?
It helps facilitate venous drainage from the head
How does hypertonic saline help with intracranial pressure?
Due to the high sodium concentration, it facilitates drawing water out of brain cells and into the bloodstream
What is Mannitol (drug)?
Osmotic diuretic, pulling fluid from tissues and into the plasma
What are Loop Dieuretics (drug)?
Work on the loop of henle by reducing sodium reabsorption and therefore promoting water and sodium elimination from the body
What the main function of corticosteroids (drug)?
Reduces inflammation
What is the main function of barbiturates (drug) in intracranial pressure?
They keep agitation seizures under control
What is an aneurysm?
Weakened bulging area in the wall of a blood vessel
Where are berry aneurysms found in the brain?
Circle of Willis
What brain injury do berry aneurysms cause if they rupture?
Subarachnoid hemorrhage
What is a “coup” traumatic brain injury?
Injury occurred at the site of impact
What is a “contrecoup” traumatic brain injury?
Injury occurred on the opposite site of impact
What happens if your spine fracture is at C1-C2?
Death
What happens if your spine fracture is at C4-C7?
Quadriplegic
What happens if your spine fracture is at L1-L2?
Paraplegic