Philips IntelliVue MX800 - 3 Use the Refernce Wave 1 and Refernce Wave 2 pop-up keys to select any ECG or respiratory wave as reference waves.; 4 Select Change Speed if you want to change the speed of the displayed wave. The speed can also be changed in the screen for editing the wedge.; 5 Select Change Scale to change the wave scale of the PAP. The same scale will be used in the screen for editing the wedge. If the setting Optimum Scale is used, the wave scale will be optimized when a wedging waveform is recognized and will revert t...; 6 Inflate the balloon when the monitor prompts you: Ready for balloon inflation. The waveform changes from the PAP to the PAWP wave. The measurement takes approximately 12 seconds. On completion, the monitor stores the PAWP waveform display and promp...

11 Monitoring Invasive Pressure
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3
Use the Refernce Wave 1 and Refernce Wave 2 pop-up keys to select any ECG or respiratory
wave as reference waves.
4 Select Change Speed if you want to change the speed of the displayed wave. The speed can also
be changed in the screen for editing the wedge.
5 Select Change Scale to change the wave scale of the PAP. The same scale will be used in the
screen for editing the wedge. If the setting
Optimum Scale is used, the wave scale will be
optimized when a wedging waveform is recognized and will revert to the previous scale when the
wedge procedure window is closed.
6 Inflate the balloon when the monitor prompts you: Ready for balloon inflation. The waveform
changes from the PAP to the PAWP wave. The measurement takes approximately 12 seconds. On
completion, the monitor stores the PAWP waveform display and prompts you to deflate the
balloon. If the monitor cannot detect a wedging waveform you must use
Store Trace to store the
wedge and two reference waves manually.
7 Deflate the balloon when the monitor prompts you: Ready for balloon deflation and verify that
the waveform returns to pulmonary artery shape.
8 If you need to start a new measurement, select Restart Wedge.
Editing the Wedge
1 Select the Edit Wedge pop-up key to see the stored waveforms.
2 The monitor displays a cursor in the waveform at the PAWP mean value. It also displays any
previously stored value and the time it was stored.
3 Select Change Speed if you want to change the speed (resolution) of the displayed wave.
4 Move the cursors up, down, right and left to set them on the correct wedge position.
5 Select Store Wedge to store the PAWP value.
6 Select Print Wedge to print the PAWP waveform and any reference waves or Record Wedge to
record them. While recording or printing, you cannot perform any more Wedge tasks.
WARNING
Prolonged inflation can cause pulmonary hemorrhage, infarction or both. Inflate the balloon for the
minimum time necessary to get an accurate measurement.
If the pulmonary artery flotation catheter drifts into the wedge position without inflation of the
balloon, the pulmonary artery pressure waveform assumes a wedged appearance. Take appropriate
action, in accordance with standard procedures, to correct the situation.
If the PAWP (mean) is greater than the PAP (systolic), deflate the balloon and report the incident in
accordance with hospital policy, because the pulmonary artery could be accidentally ruptured, and the
wedge value derived will not reflect the patient's hemodynamic state, but will merely reflect the
pressure in the catheter or balloon.