Acns - Study guides, Class notes & Summaries

ACNS Guidelines 2023 UPDATE There should be a _____ limit on total chassis leakage, and ______ limit for isolated patient connections - ANSWER 100 µA , 10 µA The grounding system should ensure that no voltage greater than ______ can be measured across an impedance of 1,000 ohms, typically at 60 Hz, between any combination of exposed conductive surfaces or grounding conductors that may be in contact with the patient or personnel - ANSWER 20 mV rms A __________should be in place to d...

When is calibrations performs? correct answer: At the start of each recording session What amplifier and averager conditions should be impletmented when performing calibration? correct answer: Amplifier and recording paramters should replicate those of the first recording session Define the waveform replication criteria for latency and amplitude correct answer: Latency replication within 1% of the total sweep time Amplitude replication within 15% of the peak to peak amplitude Refere...

Guideline 1: Minimum Technical Requirements for Performing Clinical EEG correct answer: Digital equipment has many advantages over analog equip- ment and is now used for EEG in most facilities. Some recommendations in this guideline have changed to reflect the greater functionality of digital equipment, including the ability to record good quality signal with nontraditional electrodes and slightly higher impedances. The list of basic patient information has been expanded to include more factors...

ACNS guidelines – VEP QUESTIONS WITH ANSWERS 2023/2024 UPDATE What stim rate produces "transient" VEPs? - ANSWERS Up to 4/sec What stim rate produces responses that merge into the frequency of the stimulation? What are they called? - ANSWERS 10/sec or higher, steady-state VEP Which is less variable - patterned or unpatterned stimuli? - ANSWERS Pattern stimulus Why would we use unpatterned stimuli? - ANSWERS Patients who can't fixate or attend to stimulus What should not be u...

ACNS /Montages Guidelines This is an example of? Calibration The 60 Hz filter can distort or attenuate spikes and should be used only when all measures to eliminate 60 Hz artifact have been resolved If the total circumference measures 56 cm, what is the distance from Fpz to Oz? 28.0 cm Calibration is an integral part of every EEG recording, should be performed at the beginning and end of every EEG recording,an internal process that isn't particularly helpful in digital EEG record...

What are the two two categories of events in short--latency auditory evoked potentials (SAEPs)? correct answer: electrocochleogram (ECochG) brainstem auditory evoked potentials ECochG consists of electrical responses of the __________ and ____________ to acoustic stimulation. correct answer: cochlea auditory nerve What are the (3) components of the ECochG? correct answer: cochlear microphonics summating potential auditory nerve compound action potential (AP) Cochlear microphonics...

According to the Adult ACNS EEG terminology, a pattern that has at least three independent lateralized patterns with at least one in each hemisphere is A. multifocal B. lateralized C. bilateral independent D. focal correct answer: multifocal According to the Adult ACNS EEG term, a pattern can qualify as rhythmic or periodic as long as it continues for at least how many cycles? A. 4 B. 8 C. 6 D. 3 correct answer: 6 According to the Adult ACNS EEG term, a pattern that is bilate...

What is the minimum number of channels needed for an EEG? correct answer: 16 Are needle electrodes recommended for routine use? correct answer: No Electrodes must be placed according to what system? correct answer: The 10-20 system According to ACNS Guidelines, are impedances to be checked as part of the recording? correct answer: Yes Impedances up to what kOhms are acceptable? correct answer: 10kOhms Is it more important for impedances to be under 10kohms or for them to be b...

ACNS guidelines for CLTM exam Question and answers 100% correct 2024 Nichrome and platinum are... - correct answer Nonferrous metal, MRI compatible LTME digital equipment must record (minimum) - correct answer 24 hrs of video and 32-64 channels of EEG LTME storage (minimum) - correct answer 30 gigabytes or 24 hrs of vid/EEG Intracerebral electrode impedance measurements...safe range - correct answer 10nA which is 1000 times less than reg 5-10Kohm for scalp What is the bare minimum ...