CNIM PRACTICE QUESTIONS 2024 WITH CORRECT ANSWERS

CNIM PRACTICE QUESTIONS 2024 WITH
CORRECT ANSWERS

ANASTAMOSIS? - ANSWER: ✔✔-CONNECTION or opening BETWEEN two things (especially cavities or
passages) that are normally diverging or branching, such as between blood vessels.

-COMMUNICATION BETWEEN ARTERIES



What causes the most airborne bacteria in OR?



a. blood on gown

b. blood spill

c. skin shed

d. patient vent - ANSWER: ✔✔c. skin shed



Nerve that innervates 4th and 5th fingers? - ANSWER: ✔✔Ulnar Nerve



Problem with Bilateral Synchronus Stim? - ANSWER: ✔✔Can mask unilateral problems



No N20 at baseline could mean? - ANSWER: ✔✔Stroke



What should you check 1st if you lose all waves? - ANSWER: ✔✔Stimulator



Which of the following devices measures electrode resistance?



1. Ammeter

2. Ohmmeter

3. Voltmeter

4. Photometer - ANSWER: ✔✔2. Ohmmeter

,If an evoked potential has a voltage of 10uV and the associated noise has a voltage of 50uV, what is the
signal to noise ratio after 100 averaged responses?



1. 1:1

2. 1:2

3. 2:1

4. 5:1 - ANSWER: ✔✔3. 2:1



To display median nerve SSEP response as an upward deflection, which of the following must be known?



1. Waveform polarity and latency of the response

2. Waveform polarity and polarity convention of the amplifier inputs

3. Polarity convention of amplifier inputs and amplitude of the response

4. Latency of the response and polarity convention of the amplifier inputs - ANSWER: ✔✔2. Waveform
polarity and polarity convention of the amplifier inputs



If an amplifier is rated as having 120 dB common mode rejection rate, which of the following ratios of in-
phase to out-of-phase signals would be expected?



1. 10,000:1

2. 100,000:1

3. 500,000:1

4. 1,000,000:1 - ANSWER: ✔✔4. 1,000,000:1



Which of the following cranial nerves innervates the extraocular muscles?



1. Optic

2. Facial

3. Abducens

,4. Trigeminal - ANSWER: ✔✔3. Abducens



Which of the following is an example of a SSEP far-field subcortical potential?



1. N20

2. N34

3. Erbs point

4. Popliteal Fossa - ANSWER: ✔✔2. N34



Which of the following opposes any change in current?



1. Capacitance

2. Impedance

3. Inductance

4. Resistance - ANSWER: ✔✔3. Inductance



Which of the following electrode materials has little electrode potential drift and a long time constant?



1. Tin

2. Gold

3. Silver

4. Stainless Steel - ANSWER: ✔✔2. Gold



Where should epidural electrodes be placed?



1. On the dura

2. In the spinal cord

3. Within the dural membrane

4. Between the dura and the spinal cord - ANSWER: ✔✔1. on the dura

, With referential recording, maximal amplitude cortical evoked potentials following stimulation of the left
posterior tibial nerve usually would be found between?



1. C3 and CZ

2. C4 and P4

3. FZ and CZ

4. C4 and CZ - ANSWER: ✔✔1. C3 and CZ



For preoperative posterior tibial somatosensory evoked potentials, which of the following would be the
best ipsilateral location for the ground electrode?



1. Forearm

2. Calf

3. Shoulder

4. Palm - ANSWER: ✔✔2. Calf



To record the afferent volley after posterior tibial nerve stimulation, an electrode should be placed on
the?



1. Mastoid

2. Erbs point

3. T5 spine

4. Index Finger - ANSWER: ✔✔3. T5 spine



Impedances of applied electrodes should be?



1. balanced and below 5,000 ohms

2. balanced and above 5,000 ohms

3. unbalanced and below 5,000 ohms