Dräger Infinity M300 Series Instructions For Use Manual page 219

QRS Threshold
Depending on the software versions running on the ICS and the M300/M300+ devices, the procedure you
follow to set the QRS threshold on the M300/M300+ will differ:
 If ICS is VG2.1.1 or later, and the M300/M300+ is VG2.4 or later, you set the QRS threshold by a menu
selection, either Normal or Low
 If ICS is VG2.1 or earlier, or the M300 is VG2.3 or earlier, the QRS threshold is linked to the ECG gain
and the QRS threshold buttons are grayed out. The following relationships apply:
– Setting the gain to 1, 2, 4, or 8 mV/cm, automatically sets to the QRS threshold to Normal.
– Setting the gain to 0.5 or 0.25 mV/cm, automatically sets the QRS threshold to Low.
NOTE
Patient admitted on M300/M300+ VG2.4 or later:
Changes to QRS/ARR processing leads and gain settings do not change QRS threshold settings.
Patient admitted on M300 VG2.3 and earlier:
– Changes to QRS/ARR processing leads and gain settings will alter the QRS threshold settings be-
tween Normal and Low.
– When selecting one or two QRS/ARR processing leads, a gain setting of < 1mv on either lead, sets
the ICS QRS threshold to Low.
– When selecting one or two QRS/ARR processing leads, a gain setting of > 1mv on all leads, sets the
ICS QRS threshold to Normal.
To set the QRS Threshold using ICS VG2.1.1 and M300/M300+ VG2.4 or later
From the Main ICS screen:
1 Click System setup on the ICS.
2 Click Layouts.
3 Click one of the following:
– Normal to detect QRS complexes of normal amplitude.
– Low to detect QRS complexes of low amplitude.
To set the QRS Threshold using earlier ICS and M300 versions
For ICS 2.1 or earlier, or M300 VG2.3 or earlier, from the Main ICS screen:
1 Click System setup on the ICS.
2 Click Layouts.
3 Click the drop-down arrow of the appropriate Gain/Scale channel.
4 Select the appropriate Gain value:
– Select a value of 1,2,4 or 8 mV/cm to set the QRS threshold to Normal.
– Select a value of 0.5 or 0.25 mV/cm to set the QRS threshold to Low.
Instructions for use – Infinity ® M300 and M300+ series – VG3.0
System configuration
219