ZOLL R Series Monitor Defibrillator Rev J - Manual (Page 437)

9650-0912-01 Rev. K ZOLL R Series Operator’s Guide 7–1
Chapter 7
See-Thru CPR (Optional)
WARNING! The See-Thru CPR filter works only when the R Series defibrillator is monitoring CPR.
The See-Thru CPR filter stops if:
— The unit is in pace mode.
— Patient impedance is invalid.
— OneStep CPR electrodes or OneStep Complete electrodes are no longer detected.
The See-Thru CPR filter will not remove all CPR artifact. Always stop CPR to verify
the patient’s ECG rhythm before making treatment decisions.
The See-Thru CPR filter does not operate during ECG rhythm analysis. Always stop
chest compressions during ECG rhythm analysis to avoid incorrect results caused by
the presence of CPR artifact.
Diagnostic bandwidth is never applied to the See-Thru CPR waveform.
See-Thru CPR enables the rescuer to see a close approximation of the patient’s underlying ECG
rhythm while performing CPR. See-Thru CPR is available if the R Series is monitoring CPR.
Chest compressions introduce CPR artifact into the ECG signal. See-Thru CPR uses a filter
that relies on the correlation between CPR compressions, as detected by the ZOLL Onestep
CPR or OneStep Complete electrodes, and the CPR artifact to remove much, but not all, of the
artifact from the ECG signal. Under some conditions, residual noise after filtering can obscure
the ECG rhythm, requiring the rescuer to stop CPR to assess the ECG. For example, in the case
of asystole or low amplitude PEA, the residual artifact seen after filtering may look like fine
ventricular fibrillation.