getemed VitaGuard VG2100, Руководство по эксплуатации

Страница: 102 / 124

102 Information for the doctor and qualified medical staff
I YE-RD, 2 (yellow–red, 2 electrodes)
This lead is used when only two electrodes are to be attached.
Test the quality of the signal from the heart rate monitor with all
leads.
When
View
1 displays the quality level
Good
for at least one of these
leads, further optimization is not necessary.
The following explanations follow from the section “Determining
the optimal electrode configuration” on page 53.
The electrode arrangement as depicted in Fig. 27 b (on page 54) is the
standard Einthoven arrangement and normally yields good results for
heart rate monitoring with the (yellow–red) lead.
1 Select the
Heart rate
display, and note the amplitude of the
displayed ECG signal. Press
U
to open the menu, and note the set-
ting for the
ECG lead
, e.g. "I YE-RD, 3”.
2 Select a different
ECG lead
, e.g. “II BK-RD, 3”. Press <Esc> to return
to the
Heart rate
display, and again note the displayed ECG am-
plitude.
3 Repeat the procedure for the last setting, i.e. “III BK-YE, 3”.
4 Select from all three leads the one that produces the greatest
deflection. It is not important here whether this deflection is
negative or positive.
Select the lead “I YE-RD, 3” when this is one of two leads that have
produced approximately equal amplitudes.
When none of the leads produces a particularly large amplitude you
should change the position of the black electrode and repeat the
procedure. Carefully reapply the black electrode until you obtain the
best signal amplitude.
When you reposition the electrodes, e.g. as depicted in Fig. 27 a), you
must again check the ECG amplitude and, by repeating these steps,
select the best lead for this new electrode configuration.