Section 3: Performing a Rescue
2023486-201 Rev C © 2007 General Electric Company Page 29 of 53
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Z-BAR™ INDICATOR
The Z-Bar provides a relative visual graphical indicator of the total transthoracic impedance between the two defibrillation
pads. The Z-Bar is used in the assessment of:
• Adequate Pad placement
• Pad quality and integrity
• Pad adhesion to the patient’s skin
• Proper Pad connection to the AED Pro
• Provides for quick assessment between PADS OFF and PADS SHORTED
Note: The Z-Bar is displayed on all therapy screens with the exception of the ECG MONITORING screen. On
the ECG MONITORING screen the Z-Bar will be displayed only if the detection lead is set to Pads.
The Z-Bar is divided into 5 sections. The ideal operating range is Section 3 (impedance range from 30 to <150).
Z-BAR
SECTION MEASURED IMPEDANCE
RANGE (OHMS)
DESCRIPTION COLOR FILL
1
<20Ω Lower Limit Alarm – Non operational range Red
2 >20 but < 30Ω Lower marginal operating range. Indicates
potential Pad degradation in Pad quality or
position
Yellow
3 >30 but < 150Ω Normal operating range Green
4 >150 but <180Ω Upper marginal operating range. Indicates
potential Pad degradation in Pad quality or
position
Yellow
5 >180Ω Upper Limit Alarm – Non operational range Red
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