ZOLL X Series Monitor Defibrillator Rev H - Manual (Page 234)

C HAPTER 20 S EE -T HRU CPR
20–2 www.zoll.com 9650-001355-01 Rev. H
of asystole or low amplitude PEA, the residual artifact seen after filtering may look like fine
ventricular fibrillation.
Because the filtered ECG signal may contain residual chest compression and/or filtering
artifacts, a rescuer should always follow the standard procedure of stopping CPR to assess the
patient’s ECG rhythm before determining treatment.
Using See-Thru CPR
To use See-Thru CPR
• The X Series unit must be monitoring CPR.
• ZOLL OneStep CPR pads, OneStep Complete pads, or CPR-D-padz must be attached to the
unit.
When chest compressions begin, the X Series unit automatically starts filtering the CPR artifact
after detecting the first 3 to 6 compressions. The filtered ECG, with the label “FIL,” may be
displayed on the second or third trace (by selecting FILT ECG in the Trace2 or Trace3 menu).
See-Thru CPR filtering continues as long as the OneStep CPR, OneStep Complete or
CPR-D-padz detect compressions and patient impedance is valid. When no compressions are
detected or one of the conditions noted above occurs, See-Thru CPR filtering stops, and
unfiltered ECG signals are displayed. When compressions resume, filtering automatically
restarts after 3 to 6 chest compressions.
Note: There is a delay of approximately 1/16 second between the See-Thru CPR waveform
and the Trace 1 ECG waveform.
Examples
The following examples show the effects of See-Thru CPR filtering on ECG signals
contaminated with CPR artifacts.
Each example includes:
• ECG signal with CPR artifact.
• ECG signal after the See-Thru CPR filter has removed CPR artifact.
• Indication of the period during which See-Thru CPR is active.
• CPR signal to show when CPR activity occurred.