MODULE VI - EEG INSTRUMENTATION - B. BASICS OF THE MACHINE - 2. NORMAL VALUES FOR SENSITIVITY/LOW FILTER/HIGH FILTER

Question 1

What is the sensitivity level that we use at advent health on our EEG systems

Answer 1

7 uV (7 micro volts)

Question 2

What happens to the amplitude when the sensitivity is decreased?

Answer 2

Amplitude increases

Question 3

If we go up on sensitivity, what happens to the amplitude

Answer 3

The amplitude is reduced

Question 4

What’s the ACNS guideline for impedance?

Answer 4

10 kilo ohms

Question 5

With respect to impedance balancing, we need to be within how many kilo ohms of our lowest impedance value

Answer 5

4 kilo ohms

Question 6

Why is the low frequency filter also known as high pass filter?

Answer 6

Because it blocks lower frequencies and let’s high frequencies pass

Question 7

Why is the high frequency filter also known as the low pass filter?

Answer 7

Because it blocks high frequencies and let’s the low frequencies pass

Question 8

At advent health what is our low frequency filter value and high frequency filter value?

Answer 8

Low is set to 1 Hz and high is set to 120 Hz

Question 9

What is the ACNS guidelines for the high filter value?

Answer 9

70 Hz