Treaton MPR6-03, User Manual

Page: 87 / 193

2.2 ECG Monitoring
87
a cutoff frequency of 30 Hz are turned on, these filters prevent strong suppression of
QRS complexes by noise, which interferes with their correct assessment;
o
Diagn.
– used for a more detailed analysis of the ECG, in particular, control of the
dynamics of the ST segment.
In the "Diagnostics" mode a strong isolation drift may be observed.

Artifacts such as baseline drift can occur due to loose or improper placement of the elec-
trodes (they should be attached to the smooth muscle areas of the limbs or chest wall). Re-
member that incorrect positioning can lead to serious errors in ECG interpretation.

The reliability of the asystole alarm cannot be guaranteed in cases of baseline drift that ap-
pears at a low ECG voltage, as a result of artifacts or, in some cases, associated with the
individual picture of the patient's illness.
If the contact of the electrodes with the patient's skin is not good enough,
the message "Bad contact of electrodes" may appear in the ECG window. In
this case it is necessary to use electrodes of better quality or apply a con-
tact paste or a few drops of physiological 0.9% sodium chloride solution to
the central part of the electrode.
If the electrodes are broken or if the patient's cable is in poor contact with
them, a break detector is triggered in the device. A straight line appears in-
stead of the ECG waveform,
symbols “---” and the message “Sensor reset” -
instead of the heart rate value.
In the window of the ECG channel, the measured value of the ST-segment offset is indicated in
the range of ± 20 mm (± 2 mV). To graphically represent the dynamics of changes in the meas-
ured values of the ST-segment offset, these values are recorded in the memory of the graphical
trends of the device (it. 3.1.1).
Periodically check the electrodes application site to avoid the damage of
patient
’s skin. If the skin condition changes, replace the electrodes or
change the place of their application.