2 Getting Acquainted Controls
20
High Contrast Display
To optimize visibility of the HeartStart MRx display when used in bright sunlight, the device provides
a High Contrast feature which may be enabled. In this view, the MRx display appears using a yellow
background with all other screen elements appearing in black or shades of gray. High Contrast is
enabled in Manual Defib, Pacer and Monitor Modes by pressing the Menu Select button and
selecting High Contrast On from the Main Menu.
NOTE The High Contrast feature does not display colors configured as red or blue, therefore, be sure your
device is configured correctly with the appropriate parameter color settings. Refer to “Configuration”
on page 181 for more information.
Controls
The Therapy Knob is used to turn the HeartStart MRx on in the desired mode of operation. Operating
controls are organized by function, with general function buttons located along the left and bottom
sides of the display, defibrillation controls to the right of the display, and soft keys immediately below
the display. (See Figure 1.)
Therapy Knob
The Therapy Knob serves as the power switch for the HeartStart MRx. It can be set to:
•Off
• AED - to enable AED Mode for semi-automated external defibrillation.
• Monitor - to enable Monitor Mode for 3- or 5-lead ECG monitoring, 12-lead ECG acquisition
(optional), Vital Signs Trending, or monitoring of optional parameters.
• Pacer - to enable Pacer Mode (optional) for demand or fixed mode pacing.
• Manual Defib - to enable Manual Defib Mode for asynchronous or synchronous defibrillation
(cardioversion) at the selected energy setting.
In Manual Defib Mode, without Pacing, the defibrillation energy settings are labeled as 1-9, 10, 15,
20, 30, 50, 70, 100, 120, 150, 170, and 200 Joules. If your unit is equipped with Pacing, the energy
settings are labeled as 1-10, 15, 20, 30, 50, 70, 100, 120, 150, 170, and 200 Joules.
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