CNIM Study guides, Class notes & Summaries

"Pre stimulus triggering? - Includes a period of recording before the stimulus A "beanbag" is often used: - In the lateral position A 60 Hz artifact will most likely be caused by: - Microscope A CMAP response to proximal facial nerve stimulation following tumor removal would indicate? - An intact neuromuscular pathway A condensation click - Causes the headphone diaphragm to displace toward the tympanic membrane A constant voltage stimulator - Varies the current in order to maintain a p...

A 10-bit A/D converter has how many discrete voltage values in its range? - 1024 A 10Hz signal passing through a 10 Hz locut filter will be - Reduced in amplitude by approximately 30% A 60Hz artifact would most likely be caused by: - Infusion Pump A 60Hz notch filter should not be used for evoked potential recording because of: - The ringing artifact that comes from distortion of the stimulus artifact A decrease in the power spectral edge indicates.. - a greater proportion of EEG power at ...

If you have attenuation of wave V of BAERs that persists until closing, what is the most likely cause? - Retraction of the cerebellum What is the most important setting when establishing baseline BAER data? - Side of ear stimulation When opening posterior fossa, what is the most likely cause for the attenuation of wave I of BAERs? - Drilling cranium When opening posterior fossa, what is the most likely cause for the attenuation of wave I of BAERs? - Drilling cranium A lab calibrated their...

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 - B A loss of SSEP response would most likely occur _____ to the surgical site a) Rostral b) Caudal c) Anterior d) Posterior - B After-discharges occur after what? a) ...

A 60 Hz artifact will most likely be caused by... - Microscope A decreasing body temperature of the surgical patient monitored with EPs can result in... - Increasing latencies of SSEPs and BAERs. A delay in the latency of one eye in a PREP is diagnostic of... - Compressive lesion Optic Neuritis Ischemic Optic Atrophy A patient is admitted to the operating room diagnosed with a burst fracture of the first lumbar vertebra. The most appropriate nerve(s) to monitor would be the: - PTN and UN ...

Your initial signal amplitude is 0.5 μV inside a background noise of 2 μV, what will the signal to noise ratio be after 400 averages? - 5 You would expect a loss of BAEPs in which surgery? - Pontine glioma You want your vertical resolution to: - Match the amplitude of your input to maximize the signal You want to have matching impedances so that: - You can maximize your common mode rejection You record a spinal potential to: - Establish an AP Why is platinum used in epidural recordings -...

Your intraoperative date is admitted into evidence because: (select all that apply) You are monitoring a posterior fossa procedure with ABR and facial nerve EMG. Which anesthetic agent is not OK to use with respect to your monitoring? With significant changes in cervical and cortical SSEPs during intraoperative monitoring, adequate stimulation of the median nerve is indicated by: With significant changes in cervical and cortical SSEPs during intraoperative monitoring, adequate stimulation ...

CNIM ABRET Exam Questions with 100% Correct Answers in which of the following evoked potentials is the scalp position of recording electrodes most critical? - Lower extremitity SSEP if an evoked potential has a voltage of 10 uV and the associated noise has a voltage of 50uV, waht is the signal to noise ration after 100 averages responses? - 2:1 To display median nerve SSEP response as an upward deflection, which of the following must be known? - waveform polarity and polarity convention...

CNIM ABRET Exam Questions with 100% Correct Answers Scalp position of electrodes most critical? - Lower extremity SSEP evoked potential has a voltage of 10 uV and the associated noise has a voltage of 50 uV, what is the signal-to-noise ratio after 100 averaged responses? - 2:1 To display median nerve SSEP response as an upward deflection, which of the following must be known? - Waveform polarity and polarity convention of the amplifier inputs If an amplifier is rated at having 120dB com...

CNIM Practice Exam 1 Questions And Answers (Updated And Verified) Which of the following is least likely to cause electrical interference in the operating room? - answerThe pneumatic drill If the monitoring instrument develops an inability to average, steps to take would include all the following except:? - answerConsult with the anesthesiologist anesthesia changes Lying between the adjacent surfaces of the vertebral bodies and bonding them together, are the: ? - answerIntervertebral disc...