
SpiroSphere
®
ECG Instructions for Use
Page 65/136
Version 02.02 • 04AUG2022
Basic Conditions for ECG Recording
For high-quality ECG recording, certain criteria have to be met:
Mentally prepare the subject for the examination in order to eliminate
pain and consequently tachycardia and muscle tremor.
Ambient temperature should be at least 23 °C to avoid shivering; make
sure that the subject is lying comfortably on a suitable couch or bed and
eliminate all sources of noise.
Check the condition of your equipment to ensure proper signal sampling.
Make sure that the chest electrodes are positioned according to
international standards and pay attention to polarity of the limb and
chest electrode cables.
The subject should try to avoid movement during the measurement
because this can lead to motion artifacts.
Only use original electrode cables delivered by ERT. If the wrong cable is
used the de brillation energy delivered to the patient can decrease, the
device can be damaged, or electric shock to the operator or other persons
occur.
Preparing for the Measurement
1. Attach electrodes
Procedure:
Clean the subject's skin with a skin-sensitive agent to remove probable fatty residues.
Make sure that the skin is dry before applying the electrodes.
Only the supplied disposable electrodes are to be used:
Remove protecting foil and attach the electrode to the skin.
2. Connect the ECG unit electrode cables with the electrodes.
Treatment of Isoelectric Segments within the QRS-Complex
The wave of depolarization is a spatial entity, which means that the onset of a wave will not be
evident in all leads at the same time. Isoeletric sections starting at QRS onset of a complex are
treated as part of the subsequent signi cant wave. Similarly, the isoelectric sections at the end of
the QRS-complex are incorporated into the preceding signi cant wave.
Adhesive electrodes are for single use only.
Comply with the instructions for use of the elctrodes used.
The electrodes must only be applied to intact skin.
Do not use electrodes that have exceeded their expiration date or have
dried electrode gel.
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