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CNIM PRACTICE EXAM 1
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CNIM PRACTICE EXAM 1
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CNIM PRACTICE EXAM 1During a median nerve preoperative study, a patient has discomfort at the wrist.
Stimulation electrodes are 10 mm gold disk, stimulus intensity is 20 mA, and stimulus
duration is 100 μsec. Which of the following would most likely reduce the patient's
discomfort while maintaining adequate stimulation? - answer- Decrease number of
repetitions
What is not an advantage of epidural recordings? - answer- Absence of significant
artifact
The stimulation rate is determined by the - answer- analysis time
Somatosensory evoked potentials are less reliable in patients with ? - answer-
Neuromuscular disease
When placing PTN stimulator you should not - answer- Secure the tape and bands
around the whole ankle
When you stimulate PTN where do you want to record your TO4? - answer- Abductor
Hallucis Brevis
The most appropriate ABR interstimulus interval is: - answer- 20mS
Which of the following is NOT a safety concern regarding the use of TcMEPs? - answer-
Patient history of cerebral palsy
What is the minimum required vertical resolution of an evoked potential system? -
answer- 8 bits
Which of the following is most affected by halogenated agents? - answer- Posterior
tibial cortical potential
A 10-bit A/D Converter has how many discrete voltage values in its range? - answer-
1024
If you cannot replace an electrode that has come out during surgery you: - answer- Use
a duplicate
The C8 nerve root exits the spinal cord: - answer- Above the T1 vertebrae
When an electrode falls on the floor you: - answer- You immediately pick it up and
dispose of it in a sharps container
A 60 Hz artifact would most likely be caused by - answer- Infusion pump
, Midazolam is what type of drug? - answer- Benzodiazepine
If you get artifact in you subcortical channel you: - answer- Use a spare CS5 electrode
Where is the ABR wave V generated? - answer- Midbrain
How should needle electrodes be discarded? - answer- Only is a red puncture-proof
sharps container
What is the most common reason for loss of BAEPs during retromastoid microvascular
decompression? - answer- Compromise vascular supply
The best anesthesia for SSEPs: - answer- Infusion fentanyl
Which component would be most affected by a tumor by the intersection of the spinal
cord and medulla? - answer- N13
Most strokes associated with carotid endarterectomy occur: - answer- After the cross-
clamping is released
If you cannot evaluate motor twitch you: - answer- Increase intensity until the peripheral
response no longer increases
Platinum electrodes are used to record epidural potentials because: - answer- Other
elements cause neurotoxicity when current is passed through them
Cortel-Dubousset instrumentation involves which of the following? - answer- Derotation
What is a benefit of using epidural electrodes? - answer- They are highly sensitive
Which muscle is innervated by L5 nerve root? - answer- Tibialis Anterior
Reversible loss of ABRs indicate - answer- Complete neurological recovery
Common Mode Rejection: - answer- Is the cancellation of signals that are common to
both inputs of the amplifier
You record a spinal potential to: - answer- Establish an AP
Personal Protection Devices (PPDs) consist of: - answer- gowns, gloves, mask
Opioids are used primarily for: - answer- Analgesia
n general, most anesthetic drugs have what effect on cortical responses? - answer-
Decreased amplitude, increased latency
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