EDAIC Neuroanesthesia and Neuromonitoring 3

Question 1

Which intraoperative finding on EEG monitoring during carotid endarterectomy is the threshold most commonly used to place a carotid shunt?

Accepted Answer

50% reduction in amplitude or frequency slowing

Answer

A 50% reduction in amplitude or significant frequency slowing in the ipsilateral hemisphere during carotid cross-clamping is the standard threshold for shunt placement.

Question 2

Jugular venous oxygen saturation (SjvO2) below what threshold indicates global cerebral ischemia?

Accepted Answer

55%

Answer

SjvO2 below 55% indicates increased oxygen extraction and global cerebral ischemia, requiring immediate intervention to increase oxygen delivery.

Question 3

During posterior fossa surgery in the sitting position, which complication is most immediately life-threatening?

Accepted Answer

Venous air embolism

Answer

Venous air embolism can cause cardiovascular collapse and paradoxical arterial air embolism, making it the most immediately life-threatening sitting position complication.

Question 4

Which agent provides the best neuroprotection against cerebral ischemia by reducing cerebral metabolic rate of oxygen (CMRO2) to the lowest achievable level?

Accepted Answer

Barbiturates (thiopental)

Answer

Barbiturates can produce burst suppression and maximum CMRO2 reduction (up to 50%), providing the greatest metabolic depression for neuroprotection.

Question 5

In transsphenoidal pituitary surgery, which intraoperative sign is the most reliable indicator of CSF leak into the operative field?

Accepted Answer

Pulsatile clear fluid in the surgical field

Answer

Pulsatile clear fluid (CSF) appearing in the surgical field is the direct indicator of a dural breach and CSF leak during transsphenoidal surgery.

EDAIC - European Diploma in Anesthesiology and Intensive Care Practice Test

EDAIC - European Diploma in Anesthesiology and Intensive Care Practice Test

EDAIC Neuroanesthesia and Neuromonitoring 3