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BeneVision N1 Patient Monitor Operator’s Manual
The following picture shows the QT view.
■
The current waveform is shown in the upper half in green.
■
The baseline waveform is shown below in white.
■
The start of QRS complex and the end of the T wave are marked with a vertical line.
■
In some conditions, no QT measurement can be calculated. Then the cause of failed QT measurement is
shown at the bottom of the QT numerics area and the message “Cannot Analyze QT” is shown in the
technical alarm area.
Select the left or right arrow to switch leads. Corresponding waveform will be highlighted.
8.9.5
Changing the Current QTc as Baseline
In order to quantify changes in the QTc value, you can set a QTc baseline. If no baseline has been set for this
patient within the first five minutes after getting valid QT values, the monitor will automatically set a baseline. To
set the current values as baseline, follow this procedure:
1.
From the
QT View
window, select
Set Baseline
.
2.
From the pop-up dialog box, select
OK
. This baseline will then be used to calculate
∆
QTc.
If you set a new baseline the previous baseline is discarded.
From the
QT View
window, you can also perform the following operations:
■
Select the left or right arrow to select a lead label to highlight corresponding waveform.
■
Select
Display Baseline
or
Hide Baseline
to display or hide baseline waveform.
CAUTION
•
Updating QTc baseline affects
∆
QTc value and
∆
QTc
alarm.
8.9.6
Changing QT Settings
8.9.6.1
Setting QT Alarm Properties
To set QT alarm properties, follow this procedure:
1.
Select the QT numeric area, ECG numeric area or ECG waveform area to enter the
ECG
menu.
2.
Select the
QT
tab
→
select the
Alarm
tab.
3.
Set QTc and
∆
QTc alarm properties.
8.9.6.2
Selecting Leads for QT Calculation
You can select one lead or all leads for QT calculation. To do so, follow this procedure:
1.
Select the QT numeric area, ECG numeric area or ECG waveform area to enter the
ECG
menu.
