CNIM EXAM APPARENTLY ON THE ACTUAL

CNIM EXAM APPARENTLY ON THE ACTUAL

TEST QUESTIONS AND CORRECT VERIFIED

ANSWERS/ CNIM LAT EST EXAM WITH 300+

QUESTIONS AND CORRECT ANSWERS GRADED A+

Transcranial motor evoked potentials are best elicited when using

• A train of stimuli
• Complete neuromuscular blockade
• Halogenated agents
• Stimulus rates above 20/ sec. - ANSWER-1. A train of stimuli

In Compresed Density Spectral Array, frequency is depicted by

• Y-axis
• X-axis
• Epoch
• Data points - ANSWER-2. X-axis

Which of the following is used to best identify artifact and insure electrode integrity?

• Acquiring averaged data
• Performing calibration
• Viewing live input
• Measuring impedance - ANSWER-3. Viewing live input

During carotid endarterectomies Spectral Edge Frequency is usually set to

1. 60-67%

2. 70-77% 1 / 4

3. 80-87%

4. 90-97% - ANSWER-4. 90-97%

Which of the following anesthetic agent will obliterate the transcranial electric motor evoked potential?

• Propofol
• Desflurane
• Fentanyl
• Nitrous Oxide - ANSWER-2. Desflurane

Which of the following temperatures should be annotated as being hypothermic?

• 34 degrees Celsius
• 36 degrees Celsius
• 38 degrees Celsius
• 40 degrees Celsius - ANSWER-1. 34 degrees Celsius

Which of the following systolic blood pressures is most likely to attenuate the evoked potential?

• 150 mm/Hg
• 140 mm/Hg
• 130 mm/Hg
• 120 mm/Hg - ANSWER-4. 120 mm/Hg

One contraindication of the use of transcranial electrical motor evoked potentials is

• Epilepsy
• Trigeminal neuralgia
• Scoliosis 2 / 4

• Cervical myelopathy - ANSWER-1. Epilepsy

An increase in stimulation intensity causes a linear increase of which of the following SSEP components?

1. N20

2. N45

3. P31

4. P37 - ANSWER-3. P31

Epidural electrodes are made of platinum because

• It is the most durable metal
• It is the lowest impedance metal
• The chance of allergic reaction is eliminated
• Other metals may become toxic when currents are applied - ANSWER-4. Other

metals may become toxic when currents are applied

During a median nerve preoperative study, a patient has discomfort at the wrist.Stimulation electrodes are 10 mm gold disk, stimulus intensity is 20 mA, and stimulus duration is 100 usec. Which of the following would most likely reduce the patients discomfort while maintaining adequate stimulation?

• Increase stimulus duration
• Use larger stimulating electrode
• Use smaller stimulating electrode
• Decrease stimulus intensity below motor threshold - ANSWER-2. Use larger

stimulating electrode

Which of the following would enhance wave I of the BAEP?

• Increase the rate
• Increase the intensity 3 / 4

• Decrease the analysis time
• Decrease the number of repetitions - ANSWER-2. Increase the intensity

In BAEPs, wave I can most easily be differentiated from cochlear microphonics based upon

• Amplitude
• Morphology
• Click polarity
• Absence in contralateral recording - ANSWER-3. Click polarity

What is the interstimulus interval of a 50 Hz click stimulus?

• 0.02 msec
• 0.20 msec
• 0.50 msec
• 20.00 msec - ANSWER-4. 20.00 msec

Contralateral masking should be used during BAEPs to

• Help the patient relax
• Enhance wave I amplitude
• Separate the IV/V complex
• Prevent crossover responses - ANSWER-4. Prevent crossover responses

The complete absence of a BAEP is most likely the result of

• Sedation
• Multiple sclerosis
• Severe hearing loss
• A normal age variant - ANSWER-3. Severe hearing loss
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