Vascular Surgeries Flashcards

What is the primary purpose of neurophysiological intraoperative monitoring (NIOM) during vascular surgeries?

Answer: To monitor neural pathways and prevent ischemic damage to the nervous system

NIOM during vascular surgeries aims to continuously monitor the integrity of neural pathways to prevent ischemic damage.

Which modality is commonly used in NIOM to assess cerebral perfusion during carotid endarterectomy?

Answer: Transcranial Doppler (TCD) ultrasonography

TCD ultrasonography is used to monitor blood flow velocities in cerebral arteries, helping to assess cerebral perfusion.

During abdominal aortic aneurysm (AAA) repair, which monitoring technique is most relevant to assess spinal cord integrity?

Answer: Somatosensory evoked potentials (SSEPs)

SSEPs are used to monitor the integrity of the spinal cord during AAA repair to detect potential ischemic injury.

What does a significant drop in SSEPs during vascular surgery indicate?

Answer: Potential ischemic injury to the monitored pathways

A significant drop in SSEPs can indicate potential ischemic injury to the neural pathways being monitored.

What type of anesthesia is preferred for optimal NIOM results during vascular surgery?

Answer: Total intravenous anesthesia (TIVA)

TIVA is preferred as it has less impact on neurophysiological signals compared to inhalational anesthetics.

Which monitoring modality can be used to assess cerebral function during vascular surgeries involving the aortic arch?

Answer: Near-infrared spectroscopy (NIRS)

NIRS is used to monitor cerebral oxygenation and assess cerebral function during surgeries involving the aortic arch.

What action should be taken if there is a sudden loss of motor evoked potentials (MEPs) during a vascular procedure?

Answer: Immediately notify the surgical team

A sudden loss of MEPs could indicate potential neural injury, requiring immediate attention from the surgical team.

Which factor can most significantly affect the quality of NIOM signals during vascular surgery?

Answer: Type of anesthesia used

The type of anesthesia can significantly influence the quality of neurophysiological monitoring signals.

What is the primary goal of continuous EEG monitoring during aortic arch surgery?

Answer: To monitor cerebral cortical activity and detect ischemia

Continuous EEG monitoring helps detect changes in cortical activity that may indicate ischemia or other complications.

During carotid endarterectomy, which type of monitoring is most critical for assessing the functional integrity of the cortex?

Answer: Electroencephalography (EEG)

EEG is critical for assessing the functional integrity of the cortex by monitoring electrical activity in the brain.

What does the term "baseline" refer to in the context of NIOM?

Answer: The initial recordings of neurophysiological signals before surgical manipulation

Baseline recordings are taken before any surgical intervention to provide a reference for detecting changes during surgery.