User's Manual

Pressure
18-7
Adjusting Sweep Speed
The sweep speed determines the rate at which the pressure waveform moves
across the screen. Sweep speed selections are: 50, 25, 12.5, 6.25 mm/second, or
the same sweep speed as ECG.
Displaying Waveforms with Scales
You can superimpose a vertical reference scale over pressure waveforms. Up to
four pressures can be scaled at one time.
Touching a parameter key and then the SCALES key displays scales when the
pressure parameter key is activated. Selecting SCALES ON maintains the
selected pressure display in scaled format until SCALES OFF is selected.
Freezing the Scaled Display
You can freeze a pressure waveform display to stabilize the waveform for
obtaining measurements.
To unfreeze the waveform display, select FREEZE OFF or exit the pressure menu
by touching either the PREVIOUS MENU or NORMAL SCREEN keys.
Changing the Waveform Scale
You can increase or decrease the pressure waveform scale. The bottom of the
scale is always 0 (zero). You may set the top of the scale to be any value from
10 to 500 mmHg by typing in the desired value and touching ENTER.
Selecting the Waveform Measurement
Value
You can obtain a measurement at any part of the pressure waveform by using the
horizontal cursor. The measurement value displays as CURSOR = xx in the
message line above the Pressure menu. The most common use of this function is
to obtain a pulmonary capillary wedge pressure (PCWP) value from the
pulmonary artery catheter.
To select a pressure waveform
sweep speed:
1 Touch the desired pressure
parameter key.
2 Touch SETUP.
3 Touch SWEEP SPEED.
4 Select a sweep speed.
To configure the display of
pressure waveforms with a
vertical scale:
1 Touch the desired pressure
parameter key.
2 Touch SCALES.
3 Select SCALES ON if the
pressure is to remain in scales.
To freeze the pressure display:
1 Touch the desired pressure
parameter key.
2 Touch SCALES.
3 Select FREEZE ON.
To change the pressure
waveform scale:
1 Touch the desired pressure
parameter key.
2 Touch SCALES.
3 Select SCALE 0-xxx.
4 Type a new scale.
5 Touch ENTER.
To obtain a pulmonary capillary
wedge pressure (PCWP):
1 Touch PA.
2 Inflate PA catheter balloon.
3 Touch SCALES.
4 Touch FREEZE ON.
5 Deflate PA catheter balloon.
6 Use arrow keys to position
cursor.
7 Touch SAVE PCWP.