Section 3: Calibrations and Montages

Question 1

What channel types are typically included in an MSLT montage, unless otherwise indicated?

Answer 1

EEG, EOG, Chin EMG, and EKG

Question 2

What additional channels are typically included when performing a REM Behavior Disorder Study?

Answer 2

Arm EMG channels to detect arm movements. Additional EEG channels are also sometimes recommended to rule out seizures.

Question 3

What is the recommended HFF setting for EOG channels?

Answer 3

35Hz

Question 4

What is the Time Constant?

Answer 4

The amount of time for a calibration wave to fall from its highest point, or peak, to 37% of the peak

Question 5

What is the main difference between a Baseline/Diagnostic Montage and a CPAP?

Answer 5

A CPAP Montage includes additional channels for CPAP flow, pressure, and leak.

Question 6

What is the recommended LFF setting for the SpO2 channel?

Answer 6

The SpO2 channel is a DC channel. Therefore, no filters are set for this channel.

Question 7

What is the recommended sampling rate for EEG’s, EOG’s, EKG’s, and EMG’s?

Answer 7

500Hz

Question 8

What is the recommended LFF for EEG channels?

Answer 8

0.3Hz

Question 9

Increasing the sensitivity setting from 10uV/mm to 20uV/mm will do what to the appearance of the wave?

Answer 9

It will cut the height of the wave in half.

Question 10

What is the difference between the mechanical baseline and the electrical baseline?

Answer 10

The mechanical baseline is the vertical positioning of the pen when the power is turned off. The electrical baseline refers to the same positioning when the power is turned on.

Question 11

What directly impacts the Fall Time?

Answer 11

The Low Frequency Filter

Question 12

When looking at the calibration wave, what is the rise time?

Answer 12

The amount of time it takes for the wave to travel from its baseline to 63% of its peak. This is usually measured in hundredths of a second.