1. Which type of monitoring is especially valuable during aortic
aneurysm repair to assess the spinal cord?
A. Brainstem auditory evoked potentials (BAEP)
B. Motor evoked potentials (MEPs)
C. Somatosensory evoked potentials (SSEP)
D. Transcranial Doppler ultrasound
Answer: C) Somatosensory evoked potentials (SSEP)
Rationale: SSEPs are crucial for monitoring spinal cord integrity
during aortic aneurysm repair, as the procedure can potentially
affect spinal cord blood supply.
2. During spinal surgery, if there is a sudden loss of amplitude or
disappearance of somatosensory evoked potentials (SSEPs), this
suggests:
A. A potential ischemic event
B. A successful surgery
C. A decrease in motor function
D. Complete recovery of the sensory pathway
Answer: A) A potential ischemic event
,Rationale: A significant decrease or loss of SSEP amplitude often
indicates ischemia or compression of the neural structures,
requiring immediate surgical intervention.
3. Which of the following is commonly used to monitor brainstem
integrity during surgery?
A. Electroencephalography (EEG)
B. Somatosensory evoked potentials (SSEP)
C. Brainstem auditory evoked potentials (BAEP)
D. Motor evoked potentials (MEP)
Answer: C) Brainstem auditory evoked potentials (BAEP)
Rationale: BAEPs are used to monitor the integrity of the
auditory pathways, particularly the brainstem, during surgeries
that may affect brainstem function.
4. Which of the following is the most important consideration
when using motor evoked potentials (MEPs) for intraoperative
monitoring?
A. Proper placement of the ground electrode
B. Ensuring the anesthetic regimen is suitable
C. Use of somatosensory stimulus
D. Continuous measurement of blood pressure
Answer: B) Ensuring the anesthetic regimen is suitable
, Rationale: Anesthesia can significantly affect MEPs, and care
should be taken to adjust anesthetic agents to preserve motor
function during monitoring.
5. Which of the following is the most common cause of false-
positive or false-negative results during motor evoked potential
(MEP) monitoring?
A. Patient movement
B. Inadequate electrode placement
C. Incorrect anesthetic dosage
D. Equipment malfunction
Answer: B) Inadequate electrode placement
Rationale: Incorrect electrode placement can lead to inaccurate
MEP recordings, either giving false positives or failing to detect
true motor pathway injury.
6. Which of the following is the most common site of stimulation
for somatosensory evoked potentials (SSEP) in upper limb
monitoring?
A. Median nerve
B. Tibial nerve
C. Ulnar nerve
D. Radial nerve
Answer: A) Median nerve
aneurysm repair to assess the spinal cord?
A. Brainstem auditory evoked potentials (BAEP)
B. Motor evoked potentials (MEPs)
C. Somatosensory evoked potentials (SSEP)
D. Transcranial Doppler ultrasound
Answer: C) Somatosensory evoked potentials (SSEP)
Rationale: SSEPs are crucial for monitoring spinal cord integrity
during aortic aneurysm repair, as the procedure can potentially
affect spinal cord blood supply.
2. During spinal surgery, if there is a sudden loss of amplitude or
disappearance of somatosensory evoked potentials (SSEPs), this
suggests:
A. A potential ischemic event
B. A successful surgery
C. A decrease in motor function
D. Complete recovery of the sensory pathway
Answer: A) A potential ischemic event
,Rationale: A significant decrease or loss of SSEP amplitude often
indicates ischemia or compression of the neural structures,
requiring immediate surgical intervention.
3. Which of the following is commonly used to monitor brainstem
integrity during surgery?
A. Electroencephalography (EEG)
B. Somatosensory evoked potentials (SSEP)
C. Brainstem auditory evoked potentials (BAEP)
D. Motor evoked potentials (MEP)
Answer: C) Brainstem auditory evoked potentials (BAEP)
Rationale: BAEPs are used to monitor the integrity of the
auditory pathways, particularly the brainstem, during surgeries
that may affect brainstem function.
4. Which of the following is the most important consideration
when using motor evoked potentials (MEPs) for intraoperative
monitoring?
A. Proper placement of the ground electrode
B. Ensuring the anesthetic regimen is suitable
C. Use of somatosensory stimulus
D. Continuous measurement of blood pressure
Answer: B) Ensuring the anesthetic regimen is suitable
, Rationale: Anesthesia can significantly affect MEPs, and care
should be taken to adjust anesthetic agents to preserve motor
function during monitoring.
5. Which of the following is the most common cause of false-
positive or false-negative results during motor evoked potential
(MEP) monitoring?
A. Patient movement
B. Inadequate electrode placement
C. Incorrect anesthetic dosage
D. Equipment malfunction
Answer: B) Inadequate electrode placement
Rationale: Incorrect electrode placement can lead to inaccurate
MEP recordings, either giving false positives or failing to detect
true motor pathway injury.
6. Which of the following is the most common site of stimulation
for somatosensory evoked potentials (SSEP) in upper limb
monitoring?
A. Median nerve
B. Tibial nerve
C. Ulnar nerve
D. Radial nerve
Answer: A) Median nerve
