CNIM Exam 1 Questions with Correct Answers
According to the 10-20 system of measuring, CP3 is located halfway in b/t:
a. C3 & Cz
b. C3 & P3
c. Cz & Pz
d. T3 & O1
d
According to the 10-20 System of measuring, for a head measurement of 35cm from
inion to nasion, what would the measurement be for Cz from the nasion?
a. 12cm
b. 28cm
c. 14cm
d. 17.5cm
d
Which is a violation of ABRET's code of ethics?
a. Not striving to keep current in the technology.
b. Not joining a professional organization.
c. Being disrespectful to co-workers
d. Teaching other technologists without the proper credentials
a
According to ACNS guidelines, baseline data should be established:
a. Following positioning, but prior to surgical manipulation of the nervous system
b. Prior to instrumentation
,c. Prior to incision
d. Prior to induction
a
According to ACNS guidelines, what is the recommended placement of the ground for a
cervical procedure?
a. Hand
b. Forearm
c. Neck
d. Shoulder
b
When consenting a patient for IONM who is 16 years old, who must sign the consent
form?
a. The patient's parents
b. The patient's best friend
c. Anyone other than the patient
d. The patient
a
The triceps and extensor carpi ulnaris muscles can be good locations to monitor EMG
when the surgery is close to:
a. C5 nerve root
b. L3 nerve root
c. C7 nerve root
d. T1 nerve root
,c
Due to the relative inexcitability of the motor cortex in the pediatric population, direct
cortical stimulation may not be suitable in patients less than
a. 10 years old
b. 1 years old
c. 18 years old
d. 5 years old
d
Which of the following should be reported to the surgeon?
a. Switch to backup electrodes
b. Increase in stimulus intensity
c. Change in timebase
d. Loss of response
d
During a lumbar decompression, the Cz-Fpz left LE cortical waveform amplitude drops
below 50% of baseline while the C3-C4 left LE cortical waveform amplitude maintains
unchanged. What is the appropriate action to take?
a. Check the subcortical waveform for any changes
b. Continue monitoring without alarming surgeon
c. Notify the surgeon immediately
d. Check the impedances
b
, An objective measure of meaningful change to use to warn the surgeon is the:
a. Interpeak latency decrease
b. 10% amplitude decrease
c. 50% amplitude decrease
d. Latency decrease
c
A sudden loss of wave V of the ipsilateral BAEP during microvascular decompression
for trigeminal neuralgia is most consistent w/:
a. Increase in dosage of inhaled anesthetics
b. Traction on the vestibulocochlear nerve
c. Ischemic in injury
d. Dislodging of tubing/transducer from ear canal
b
The warning signal for deteriorating EP's during surgical monitoring is:
a. Amplitude reduction to 10% of control amplitude
b. Amplitude reduction more than 50% of control amplitude
c. Amplitude enhancement more than 100% of control amplitude
d. Latency shortening more than 10%
b
If all the waveforms for the upper left SSEP attenuate except for the Erb's channel
waveform, what should you do?
a. Check the computer settings (mA, filters, gain, etc)
b. Check the stimulating electrodes
According to the 10-20 system of measuring, CP3 is located halfway in b/t:
a. C3 & Cz
b. C3 & P3
c. Cz & Pz
d. T3 & O1
d
According to the 10-20 System of measuring, for a head measurement of 35cm from
inion to nasion, what would the measurement be for Cz from the nasion?
a. 12cm
b. 28cm
c. 14cm
d. 17.5cm
d
Which is a violation of ABRET's code of ethics?
a. Not striving to keep current in the technology.
b. Not joining a professional organization.
c. Being disrespectful to co-workers
d. Teaching other technologists without the proper credentials
a
According to ACNS guidelines, baseline data should be established:
a. Following positioning, but prior to surgical manipulation of the nervous system
b. Prior to instrumentation
,c. Prior to incision
d. Prior to induction
a
According to ACNS guidelines, what is the recommended placement of the ground for a
cervical procedure?
a. Hand
b. Forearm
c. Neck
d. Shoulder
b
When consenting a patient for IONM who is 16 years old, who must sign the consent
form?
a. The patient's parents
b. The patient's best friend
c. Anyone other than the patient
d. The patient
a
The triceps and extensor carpi ulnaris muscles can be good locations to monitor EMG
when the surgery is close to:
a. C5 nerve root
b. L3 nerve root
c. C7 nerve root
d. T1 nerve root
,c
Due to the relative inexcitability of the motor cortex in the pediatric population, direct
cortical stimulation may not be suitable in patients less than
a. 10 years old
b. 1 years old
c. 18 years old
d. 5 years old
d
Which of the following should be reported to the surgeon?
a. Switch to backup electrodes
b. Increase in stimulus intensity
c. Change in timebase
d. Loss of response
d
During a lumbar decompression, the Cz-Fpz left LE cortical waveform amplitude drops
below 50% of baseline while the C3-C4 left LE cortical waveform amplitude maintains
unchanged. What is the appropriate action to take?
a. Check the subcortical waveform for any changes
b. Continue monitoring without alarming surgeon
c. Notify the surgeon immediately
d. Check the impedances
b
, An objective measure of meaningful change to use to warn the surgeon is the:
a. Interpeak latency decrease
b. 10% amplitude decrease
c. 50% amplitude decrease
d. Latency decrease
c
A sudden loss of wave V of the ipsilateral BAEP during microvascular decompression
for trigeminal neuralgia is most consistent w/:
a. Increase in dosage of inhaled anesthetics
b. Traction on the vestibulocochlear nerve
c. Ischemic in injury
d. Dislodging of tubing/transducer from ear canal
b
The warning signal for deteriorating EP's during surgical monitoring is:
a. Amplitude reduction to 10% of control amplitude
b. Amplitude reduction more than 50% of control amplitude
c. Amplitude enhancement more than 100% of control amplitude
d. Latency shortening more than 10%
b
If all the waveforms for the upper left SSEP attenuate except for the Erb's channel
waveform, what should you do?
a. Check the computer settings (mA, filters, gain, etc)
b. Check the stimulating electrodes
