ZOLL X Series, Operator'S Manual

Page: 184 / 344

Chapter 14 12-Lead ECG Interpretive Analysis
14-2 www.zoll.com 9650-001355-01 Rev. M
Warning! • 12-Lead ECG monitoring is intended for the recording of 12-lead ECG signals from
adult and pediatric patients in the supine, resting position -- always ensure that the
patient is kept motionless during 12-lead ECG signal acquisition and analysis. Use of
the device to acquire ECG signals from moving or shaking patients may produce noisy
signals that are difficult to interpret.
• The 12-Lead Interpretive algorithm's interpretive statements are designed to enhance
the diagnostic process. They are no substitute for the qualified judgment of a properly
trained clinician. As with any diagnostic test, always give consideration to patient
symptoms, history, and other relevant factors.
• 12-Lead Interpretive Analysis is for use with only adult patients.
• It is important to enter each patient’s age and gender prior to performing ECG
analysis using the Inovise 12L Interpretive Algorithm. Providing patient age and
gender will ensure that highest accuracy of ECG analysis is attained. If age is not
provided, a default of 45 years is used. If gender is not provided, the default is male.
• Excessive body hair or wet, sweaty skin may interfere with electrode adhesion. Remove
the hair and/or moisture from the area where the electrode is to be attached.
• Remove ECG electrodes from their sealed package immediately prior to use. Using
previously opened or out-of- date electrodes may degrade the ECG signal quality.
• Monitoring electrodes may become polarized during defibrillator discharge, causing
the ECG waveform to briefly go off screen. ZOLL Medical Corporation recommends
the use of high quality silver/silver chloride (Ag/AgCl) electrodes to minimize this
effect; the circuitry in the instrument returns the trace to the monitor display within a
few seconds.
• Wait 15 seconds after defibrillator discharge before attempting a 12-lead acquisition.
Electrode polarization subsequent to defibrillator discharge may result in excessive
noise on the 12-lead ECG printout.
• When not in use, cover the patient cable's V-lead connector with the supplied plastic
cap. Failure to do so may result in a shock hazard during defibrillation attempts.
• To assure protection against the effects of defibrillator discharge, use only 12-lead
cables supplied by ZOLL Medical Corporation.
• Check the operation and integrity of the X Series unit and 12-lead cable regularly by
performing the Daily Operational Verification Test.
• When attempting to interpret subtle ECG changes (such as ST segments) use only the
Diagnostic frequency response setting. Other frequency response settings may cause
misinterpretation of the patient’s ECG.
• Use only ZOLL-approved accessories to ensure the Type CF defibrillator proof rating
of the 12-Lead input.
• Implanted pacemakers may cause the heart rate meter to count the pacemaker rate
during incidents of cardiac arrest or other arrhythmias. Carefully observe pacemaker
patients. Check the patient's pulse; do not rely solely on heart rate meters. Dedicated
pacemaker detection circuitry may not detect all implanted pacemaker spikes. Patient
history and physical exam are important in determining the presence of an implanted
pacemaker.