Chapter 9 Key Terms

Front 1

Patient Chart

Back 1

Brief medical history, physical examination results, patient demographics, and a list of any special needs the patient may have.

Front 2

Physician Order

Back 2

Most important piece of the patient chart.

Front 3

Patient Tray

Back 3

EEG paste

Tape

CPAP Masks

EEG marker or pen

Cotton Swabs

Clipboard with patient papers

Electtrodes, sensors, and lead wires

Alcohol prep pads

Precut GAUZE PADS

mEASURING TAPE

gLOVES

Prepping gels and pastes

Hair Clips

Front 4

Ambulatory Sleep Studies

Back 4

A sleep study using mobile equipment to study the patient in a hospital room or at home.

When preforming these equipment is usually disconnected for each study.

Front 5

Montage

Back 5

The configuration of all the channels included in the study.

Has channel names, signals, filter settings, sensivtivity and or gain settings, and sample rates.

Front 6

What are the different Montages?

Back 6

Baseline Study Montage

CPAP Montage

MSLT Montage

REM behavior disorder study Montage

Nocturnal seizure disorder montage

Front 7

Sampling Rates

Back 7

The designated number of bits recorded per second in a channel.

Front 8

Amplifier Calibrations

Back 8

A set of tests preformed at the beginning and end of every sleep study that ensure the validity of the signals transmitted from the amplifier to the polysomnograph. Displays a signal of 50 uV and -50 uV

Front 9

Rise Time

Back 9

The amount of time for a calibration signal to rise from baseline to 63% of the peak.

Front 10

Fall Time

Back 10

The amount of time for a calibration wave to fall from the peak to 37% of the peak.

Front 11

Time Constant

Back 11

The fall time of a calibration wave to 37% of its amplitude. Time constant is synonymous with the LFF. Performs the same function as the LFF i that they both place limits on the amount of slow wave activity displayed.

Front 12

Frequency

Back 12

Measured by Hz and or Cycles per second.

Front 13

Amplitude

Back 13

Directed affected by the voltage.

When sensitivity and gain settings are identical, a taller wave is derived from a higher voltage signal than a shorter wave.

Front 14

Rise Time & Filters

Back 14

The rise time of a calibration wave increases and decreases with the HFF setting. A decreased LFF setting allows slower waves to enter the signal, which causes the calibration wave to fall more slowly. A decreased LFF setting increases the time constant.

Front 15

Sensitivity

Back 15

Determines the number of microvolts per vertical millimeter (uV/mm) that a channel will display. A decreased number of microvolts per mm results in a taller wave and vice versa.

Front 16

Gain

Back 16

The number of times the height of a waveform is multiplied.

Front 17

Mechanical Baseline

Back 17

The vertical placement of a pen when the power to the amplifier is turned off.

Front 18

Electrical Baseline

Back 18

The vertical position of a pen when the power to the amplifier is turned on.

Front 19

Time Axes

Back 19

The horizontal timeline of the polysomnogram. If the time axis of a pen is misaligned, signals occurring at identical times in multiple channels will appear to occur at different times from each other.

Front 20

Misalignment

Back 20

Occurs when an extraneous voltage is applied to a channel with the power on, which causes the pen to move up when the voltage in that channel is supposedly 0 uV.

Front 21

Time Axis Misalignment

Back 21

Appears as though the signals received in that channel occur earlier or later, respectively, than other channels.