Emergency Room And Intensive Care Management

Question 1

Pupillary light reflex is function of what cranial nerve

Answer 1

CN 3: Oculomotor nerve

Question 2

Definition of asymmetric pupil or dilated/ fixed pupil?

What does it indicate

Answer 2

Asymmetric: >1mm difference in pupil diameter

Fixed/ Dilated pupils < 1mm response to bright light

Indicate:
Brain herniation or
Brain stem ischemia

Question 3

Define Cushing Triad?

Answer 3

HTN
Bradycardia
Irregular breathing

Question 4

What is the Monroe Kellie doctrine

Answer 4

Volume of brain + CSF + intracranial blood remains constant

If there’s an increase in one or more component— one or both of the other component must decrease OR ICP will increase