Neuro

Question 1

Most common cause of death in SAH?

Answer 1

Bleeding

Question 2

Most common cause of death in first 24h of SAH?

Answer 2

Re-bleeding

Question 3

When does re-bleeding peak in SAH?

Answer 3

First 24h

Question 4

When does vasospasm develop in SAH?

Answer 4

3rd day typically

Question 5

When does vasospasm risk peak in SAH?

Answer 5

By 5-10 days

Question 6

Classic ECG finding of SAH?

Answer 6

Symmetric T-wave inversion and QT prolongation

Question 7

What brain structure is compressed to produce Cushing reflex?

Answer 7

Medulla

Question 8

Criteria for clearance of C-spine?

Answer 8

1) Absence of cervical pain or tenderness
2) Absence of parathesias or neurologic deficits
3) Normal Mental Status
4) No distracting pain
5) > 4 years of age

Question 9

What is the normal CPP?

Answer 9

70-85 mmHg

Question 10

What is CPP?

Answer 10

CPP= MAP -ICP (or CVP whichever is greater)

Question 11

How can one differentiate CSWS and SIADH on the basis of urine sodium?

Answer 11

SIADH urine Na < 100 mEq/L

CSWS urine Na > 100 mEq/L

Question 12

What is inverse steal/Robin Hood phenomenon?

Answer 12

When vasoconstriction in normal vasculature eases to improved flow in areas of ischemia

Question 13

What is brain glucose metabolism?q

Answer 13

5mg/100gm brain/min

Question 14

What is normal CMR02?

Answer 14

3-3.8/100gm/min

Question 15

Main metabolic substrate of the brain during starvation?

Answer 15

Ketones