Neurology - CPP and ICP

Question 1

The Monroe-Kellie doctrine states that the sum of _______ remains constant.

Answer 1

all contents in the skull (blood, CSF, brain parenchyma)

Question 2

What are the steps of “correction” with increasing ICP?

Answer 2

• Evacuation of venous blood (squeezing of venous sinuses)
• Evacuation of CSF (squeezing of ventricles)
• Herniation of brain itself

Question 3

Evaluation of elevated ICP in the field.

Answer 3

• Evaluate changes to mental status
• Evaluate for posturing (decorticate or decerebrate posturing)
• Dilated pupils

Question 4

For intracranial injury, dilated pupils occur on the (same/opposite) side of the brain lesion.

Answer 4

same side

Question 5

Cushing’s Triad

Answer 5

• HTN
• Bradycardia
• Abnormal respirations

Question 6

Cushing’s Triad is a(n) (late/early) sign of increased ICP

Answer 6

late

Question 7

How do we optimize venous outflow from the brain in incr. ICP?

Answer 7

• elevate head of bed

- loosen cervical collar

Question 8

Explauin the mechanism of sedation decreasing ICP

Answer 8

Sedation results in decreased blood flow, as “thinking” increases blood flow