CNIM GUIDELINES – PRACTICE QUESTIONS AND
ANSWERS
What is the maximum allowed chassis leakage current?
1) 10 mA 2) 20 mA
c) 0.1 mA d) 10 mA (answer C)
What is the maximum permitted leakage current from isolated amplifier inputs
to patient leads?
Answer A: 10 uA, 100 uA, 1 mA, or 10 mA.
What is the equipment that detects current leaks?
a) Ammeter b) Ohmmeter c) Voltmeter d) Photometer (answer A)
What colour code represents ground in an alternating current power line?
Options include red, green, black, and white. - ANSWER B
Poor ground resistance is a safety risk because:
a) It is not a safety concern. b) Leaking current to the chassis may lead to
grounding through your body. c) The machine may not function properly. d)
Other electrical equipment connected to Earth ground may be affected
(ANSWER B).
How often should the evoked potential machines be calibrated and safety
checked?
a) Only when there is a problem b) Every 6 months c) Once a year d) Every two
years (answer B)
Evoked potential systems must be calibrated at least once each:
a) Six months b) One year c) Two years d) Periodically as needed (answer A)
What's the most important item to document?
a) Patient's hematocrit b) Blood pressure c) Significant surgical events d) Urine
output (answer C)
, Maintaining detailed documentation during a surgical case is crucial for
providing details related to a functional loss and directing the technologist's
attention to the process.
c) Justify billing for monitoring service d) All of the above (ANSWER A)
Avoid using N20, Vecuronium, Phenytoin, or Isoflurane prior to EMG for facial
nerve monitoring (answer B).
Which of the following medicines has a significant impact on peripheral nerve
APs?
Sufentanil, Vecuronium, Desflurane, or None of the Above (ANSWER D)
Which medication is best suited for spontaneous EMG monitoring at induction?
Curare, Paculon, Succinyl-choline, and Norcuron (answer C).
Which of the following has the biggest negative impact on SEP monitoring?
Answer B: Ketamine, N20 + Desflurane, Pancuronium, and Propofol.
To monitor the facial nerve, avoid long-lasting muscle relaxants, insert bipolar
electrodes in the larynx, needle electrodes in the master, and avoid inhalational
anesthetics (answer A).
Intraoperative baseline recordings in somatosensory evoked potentials are best
obtained:
a) In a highly attentive, awake patient b) Before positioning c) Before anesthetic
induction d) After a patient has been positioned and induced (answer D)
The criterion for determining whether an intraoperative ANSWER has
considerably changed should be based on:
a) Normative data b) Pre-anesthetic data c) Absolute reference based on height
d) Patient baseline ANSWERs - Answer D.
What is an acceptable threshold for a major change in Minnesota SSEP?
a) Change latency by 50% and amplitude by 10%. b) Change latency and
amplitude by 50% each.
b) 10% change in latency and amplitude.
d) 10% change in delay, 50% change in loudness. - Answer D.
ANSWERS
What is the maximum allowed chassis leakage current?
1) 10 mA 2) 20 mA
c) 0.1 mA d) 10 mA (answer C)
What is the maximum permitted leakage current from isolated amplifier inputs
to patient leads?
Answer A: 10 uA, 100 uA, 1 mA, or 10 mA.
What is the equipment that detects current leaks?
a) Ammeter b) Ohmmeter c) Voltmeter d) Photometer (answer A)
What colour code represents ground in an alternating current power line?
Options include red, green, black, and white. - ANSWER B
Poor ground resistance is a safety risk because:
a) It is not a safety concern. b) Leaking current to the chassis may lead to
grounding through your body. c) The machine may not function properly. d)
Other electrical equipment connected to Earth ground may be affected
(ANSWER B).
How often should the evoked potential machines be calibrated and safety
checked?
a) Only when there is a problem b) Every 6 months c) Once a year d) Every two
years (answer B)
Evoked potential systems must be calibrated at least once each:
a) Six months b) One year c) Two years d) Periodically as needed (answer A)
What's the most important item to document?
a) Patient's hematocrit b) Blood pressure c) Significant surgical events d) Urine
output (answer C)
, Maintaining detailed documentation during a surgical case is crucial for
providing details related to a functional loss and directing the technologist's
attention to the process.
c) Justify billing for monitoring service d) All of the above (ANSWER A)
Avoid using N20, Vecuronium, Phenytoin, or Isoflurane prior to EMG for facial
nerve monitoring (answer B).
Which of the following medicines has a significant impact on peripheral nerve
APs?
Sufentanil, Vecuronium, Desflurane, or None of the Above (ANSWER D)
Which medication is best suited for spontaneous EMG monitoring at induction?
Curare, Paculon, Succinyl-choline, and Norcuron (answer C).
Which of the following has the biggest negative impact on SEP monitoring?
Answer B: Ketamine, N20 + Desflurane, Pancuronium, and Propofol.
To monitor the facial nerve, avoid long-lasting muscle relaxants, insert bipolar
electrodes in the larynx, needle electrodes in the master, and avoid inhalational
anesthetics (answer A).
Intraoperative baseline recordings in somatosensory evoked potentials are best
obtained:
a) In a highly attentive, awake patient b) Before positioning c) Before anesthetic
induction d) After a patient has been positioned and induced (answer D)
The criterion for determining whether an intraoperative ANSWER has
considerably changed should be based on:
a) Normative data b) Pre-anesthetic data c) Absolute reference based on height
d) Patient baseline ANSWERs - Answer D.
What is an acceptable threshold for a major change in Minnesota SSEP?
a) Change latency by 50% and amplitude by 10%. b) Change latency and
amplitude by 50% each.
b) 10% change in latency and amplitude.
d) 10% change in delay, 50% change in loudness. - Answer D.
