Stroke

Question 1

Define stroke

Answer 1

Decreased perfusion of brain tissue, caused by bleeding inside the skull, or a clot, resulting in neurological deficits.

Question 2

Types of stroke

Answer 2

Epidural haemotoma

Subdural haemotoma

Sub arachnoid

Question 3

Layers of the brain
5

S DAP B

Answer 3

Skull
Dura mater
Arachnoid mater 
- contains blood vessels 
Pia mater
Brain tissue

Question 4

Epidural haemotoma discuss.

Answer 4

Bleeding between the skull and duramater

venous 10% arterial 90%

following falls or traumatic injury

Pressure increase is slow and

Question 5

How does stroke progress

Answer 5

The skull is a closed vault.
CPP = MAP - ICP
Bleeding increases intracranial pressure and puts increased pressure on brain tissue
Pressure becomes obstructive so perfusion decreases
Decreased perfusion leads to ischemia.

Question 6

Signs and symptoms of Stroke

Late signs of stroke

Answer 6

Headache
Nausea
Pupils, motor, face, dysphasia

Cushing triad - opposite of shock

• Decreased heart rate
• Elevated SYSTOLIC blood pressure (Widened PP)
• Irregular (DECREASED) breathing

Question 7

Sub Arachnoid haemorrhage

Definition

Answer 7

Bleeding below the arachnoid space, usually arterial, leading to increased pressure between the brain and the tissue covering it.

Sub Arachnoid bleeds mix with CSF, pressure changes can occur quickly

Onset with a thunderclap headache

Berry aneurysm is common