Mindray iPM-9800, Operator'S Manual

Page: 92 / 300

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8.6.6 Setting ST Alarm Delay Time
You can set ST alarm delay time by selecting [
ST Alarm Delay
] from [
ST Analysis>>
].
The following ST alarm delay time is optional: 30s (default), 45s, 1min, 1.5min, 2 min, and
3min.
8.6.7 Adjusting ST Measurement Points
As shown in the figure below, the ST measurement for each beat complex is the vertical
difference between two measurement points with the R-wave peak as the baseline for the
measurement.
The ISO and ST points need to be adjusted when you start monitoring or if the patient’s
heart rate or ECG morphology changes significantly. Exceptional QRS complexes are not
considered for ST-segment analysis.
WARNING
z
Always make sure that the positions of ST measurement points are appropriate for
your patient.
Basic algorithm
To adjust ST measurement points:
1. In the [
ST Analysis
] menu, select [
Adjust ST Points >>
]. In the [
Adjust ST Points
]
window, two vertical lines represent the ISO and ST point positions respectively.
2. Select the and arrow keys beside the [
ISO
] or [
ST
] to move the measurement
points.
‹ ISO-point (isoelectric): provides baseline for the measurement.
‹
ST: marks the end point of the ST segment analysis.
R-wave peak
P
T
Isoelectric point ST measurement point Difference=ST value