Cnim Frequent Miss Updated Actual Questions With Correct Answers

CNIM FREQUENT MISS UPDATED ACTUAL QUESTIONS
WITH CORRECT ANSWERS
Question 1.
A patient with a body temperature of 30 degrees C will have:
A- Decreased latencies B- Decreased latencies, decreased amplitudes C- Increased latencies D-
Increased latencies, decreased amplitudes

ANSWER
C- Increased latencies



Question 2.
The P31 response to posterior tibial nerve stimulation:
A- Is recordable over a generalized region of scalp B- Is best recorded by an electrode placed at
CS5 C- Is generated by the thalamus D- Reflects post-synaptic activity in the cervical spinal cord

ANSWER
A- Is recordable over a generalized region of scalp



Question 3.
Why are SSEP and MEP used simultaneously? A- Because MEPs indicate spinothalamic tract
function B- Spinal cord damage can occur in only one tract causing loss of MEP but not SSEP C-
Because SSEP monitoring alone is not very sensitive to changes in spinal cord function D- All of
the above

ANSWER
B- Spinal cord damage can occur in only one tract causing loss of MEP but not SSEP



Question 4.
If the bin width of you system is 20 μS, then the highest frequency signal that can be resolved
is:
A- 50 KHz B- 100 KHz D- 20 KHz

ANSWER
C- 25 KHz



Question 5.
EEG will most likely disappear at what body temperature? A- 16 º C B- 36º C C- 23 º C D- 28º C

ANSWER
A- 16 º C




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,Question 6.
What will be the frequency of a signal if in a 30 mS sweep the interval between each cycle of
the signal is 0.03 mS? A- 3333 KHz B- 33 KHz C- 333 KHz D- 3 KHz

ANSWER
B- 33 KHz



Question 7.
According to the Guidelines what is the acceptable sweep for ABR's? A- 20-30 msec B- 10-15
msec C- 5 msec D- 25 msec

ANSWER
B- 10-15 msec



Question 8.
You do not want to use a power extension cord because:
A- It is a fire hazard the patient if the ground fails C- It may interfere with the operation of other
devices in the operating room D- It will increase your risk of ground leakage

ANSWER
D- It will increase your risk of ground leakage



Question 9.
Which of the following is a barbiturate? A- Methohexital B- Remifentanyl C- Nitrous Oxide D-
Curare

ANSWER
A- Methohexital



Question 10.
Tinel's sign A- Cortex B- Spinal cord C- Muscle D- Peripheral nerve

ANSWER
D- Peripheral nerve



Question 11.
Cortel-Dubousset instrumentation involves which of the following? A- Derotation B- Distraction
C- Sublaminar wires D- Intervertebral diskectomy

ANSWER
A- Derotation




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, Question 12.
A loss of SSEP response would most likely occur ________ to the surgical site. A- Anterior B-
Caudal D- Rostral

ANSWER
D- Rostral



Question 13.
What is the noise reduction technique that best reduces EKG artifact? A- Common mode
rejection B- Averaging C- Artifact reject D- Hicut filter

ANSWER
C- Artifact reject



Question 14.
When you have a salt bridge you will:
A- Be able to stimulate the underlying nerve better B- Create a lethal pathway for current C-
Max out your impedances D- Have difficulty stimulating the underlying nerve

ANSWER
D- Have difficulty stimulating the underlying nerve



Question 15.
All of the following are benefits of EEG monitoring during carotid endarterectomy except:
A- Selective shunting B- Detection of hypoxia C- Detection of occlusion-associated ischemia D-
Detection of heparin dosage

ANSWER
D- Detection of heparin dosage



Question 16.
If you have a 5 μV signal amplitude and a 20 μV noise amplitude, how many averages would
you need to get a signal to noise ratio of 2:1? A- 100 B- 20 D- 16

ANSWER
C- 64



Question 17.
Which component would be most affected by a tumor by the intersection of the spinal cord and
medulla? A- N13 B- P31 C- N20 D- EP

ANSWER
A- N13




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