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CNIM EXAM PRACTICE QUESTIONS AND ANSWERS
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CNIM EXAM PRACTICE QUESTIONS AND ANSWERS
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CNIM EXAM PRACTICE QUESTIONS AND ANSWERSWhat is the maximum allowable chassis leakage current?
a) 10 mA
b) 20 mA
c) 0.1 mA
d) 10 mA - answer- C
What is the maximum allowable leakage current from the isolated amplifier inputs
through the patient leads?
a) 10 uA
b) 100 uA
c) 1 mA
d) 10 mA - answer- A
What is the machine that measures current leakage?
a) Ammeter
b) Ohmmeter
c) Voltmeter
d) Photometer - answer- A
What is the color code for ground in an AC Power line?
a) Red
b) Green
c) Black
d) White - answer- B
Having poor ground resistance represents a safety problem b/c:
a) No, it really is not a safety issue
b) Any current leaking to the chassis may find a path to ground through your body
c) The machine might not function properly
d) It may affect other electrical equipment that have connections to Earth ground -
answer- B
How frequently should the evoked potential machines be calibrated and safety tested?
a) Only when there is a problem
b) Every 6 months
c) Once a year
d) Once every two years - answer- B
The median nerve is an excellent measure of:
a) Cerebral blood flow
b) Central spinal cord perfusion
c) Lower motor neuron function
, d) Lateral lemniscal function - answer- A
A loss of SSEP response would most likely occur _____ to the surgical site
a) Rostral
b) Caudal
c) Anterior
d) Posterior - answer- B
Given these results on a MN SSEP test you should:
a) Evaluate patient alertness
b) Check electrode impedance
c) Test leakage current
d) Retest at high stimulus intensity - answer- D
To record upper cortical SSEPs during intraoperative monitoring of cervical spinal cord
surgery, electrodes should be placed:
a) 2 cm anterior to C3 and C4
b) 2 cm posterior to C3 and C4
c) in the C3 and C4 positions of the 10/20 system
d) B/w Cz and Pz, and b/w Pz and Oz - answer- B
With significant changes in cervical and cortical SSEPs during intraoperative monitoring,
adequate stimulation of the median nerve is indicated by:
a) No change in the peripheral responses
b) A persistent thumb twitch
c) Consistent anesthetic levels
d) A loss of peripheral response - answer- A
A global significant decrease in amplitude of cortical SSEPs w/o significant decrease in
amplitude of cervical and subcortical responses in a lumbar spine surgery is most
possibly due to:
a) Inadequate stimulation
b) Changes in anesthesia regimen
c) Significant blood loss due to surgery
d) Damages caused by the surgery - answer- B
After-discharges occur after what?
a) Seizure
b) Transcranial motor stimulation
c) Direct cortical stimulation
d) Phase reversal - answer- C
When no phase reversal is present in an anterior-posterior cortical grid recording:
a) The grid is over the pre-central gyrus
b) The maximum amplitude response is closest to the central sulcus
c) The grid is over the post-central gyrus
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