When recording a ptn ssep - Study guides, Class notes & Summaries

Which of the following would best enhance resolution of evoked potential waveforms? - Increase number of averaged stimuli What is the typical MINIMUM common mode rejection ratio of in-phase signals recommended for evoked potential instruments? - 10,000:1 Which of the following cranial nerves is most at risk during acoustic neuroma surgery? - CN VII The impedance of cup electrodes is: - Lower than needle electrodes because of their size Amplitude of an evoked potential depends on which of the...

CNIM - Surgical Procedure and Monitoring Strategy Question and answers already passed 2024 Monitoring aneurysms involving the ACA should include... - correct answer Tibial nerve SSEP Monitoring of aneurysms involving the posterior fossa should include... - correct answer Both SSEP and ABR Though the use of electrical cautery can obliterate EP waveforms, IONM should be continued... - correct answer By monitoring the raw, averaged data What is the most critical stage of a scoliosis s...

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 μsec. Which of the following would most likely reduce the patient's discomfort while maintaining adequate stimulation? - Decrease number of repetitions What is not an advantage of epidural recordings? - Absence of significant artifact The stimulation rate is determined by the - analysis time Somatosensory...

CNIM IV Exam 2024 With Correct Solutions A pneumatic drill would introduce what kind of artifact? - Answer -500 Hz Which of the following diseases results from infection by a bloodborne pathogen? - Answer -Hepatitis B Annular disruption - Answer -Disc herniation Which of the following the down going potential recorded at about 12 msec following stimulation of the ear in the following diagram? - Answer -Postauricular muscle reflex Facial nerve spontaneous EMG is recommended to be recorded w...

You record a spinal potentialto: - correct answer Establish an Action potential (AP) What drugs would you use for language mapping? - correct answer Fentanyl D waves are recorded form which of the following electrodes? - correct answer Epidural electrodes over the spinal cord. Horizontal Dipole: - correct answer P14 What nerve roots are being monitored using the Peroneus longus muscle? - correct answer L5-S2 Which is the main reason for measuring impedances of all electrodes? - co...

CNIM – SSEP EXAM QUESTIONS AND VERIFIED ANSWERS...

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 μsec. Which of the following would most likely reduce the patient's discomfort while maintaining adequate stimulation? -correct answer Decrease number of repetitions What is not an advantage of epidural recordings? -correct answer Absence of significant artifact The stimulation rate is determined by the -c...

ANASTAMOSIS? - -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 - c. skin shed Nerve that innervates 4th and 5th fingers? - Ulnar Nerve Problem with Bilateral Synchronus Stim? - Can mask unilateral problems No N20 at baseline could mean? - Stroke ...

Cavities inside the skull - Anterior/middle/posterior fossa Cranial bones - Frontal, occipital, sphenoid, ethmoid (unpaired). Parietal & temporal (paired). Mental protuberance - chin bone MCA supply of the cerebral cortex - Hand + face/mouth/auditory Cranial nerves - -12 pairs (Mixed fibers: sensory/motor/both). -Emerge @ irregular intervals from the brain. -Nuclei displacement: Motor = medial Sensory = lateral Meckle's Cave - Depression in the medial middle fossa where CN V ganglion...

When recording a posterior tibial nerve SSEP, the Fpz ‐ C5s channel records - Answer subcortical far ‐ field potentials In the 10 ‐ 20 system of electrode placement, the point 20% (of the nasion‐inion distance) anterior to Cz is called - Answer Fz An electrode measured 20% lateral to Cz on the right using 10 ‐ 20 system is - Answer C4 P14 is a far ‐ field, subcortically generated response which probably reflects - Answer caudal medial lemniscal activity If over th...