ACNS Guidelines 1 Review Questions And Answers With Complete Solutions

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 balanced? correct answer: Balanced Why is it important for impedances to be balanced? correct answer: By being balanced it reduces noise and allows the EEG amplifier to properly reject potentials that are the same while amplifying the potentials that are different. Can an electrode have artifact even when it is balanced and under 10kohms? correct answer: Yes What is the minimum information needed for a study? correct answer: - the name and age of the patient - the date of the recording - an identification number - and the name or initials of the technologist What should a basic data sheet that accompanies the EEG study include? correct answer: - patient name and age - the time and date of the recording - name/initials of the technologist - indication for the EEG (including description of symptoms or events, and their frequency) - the time and date of the last seizure/episode (if any) - the behavioral state of the patient - a list of all medications the patient has been taking (including pre-medication given to induce sleep during EEG)