User Manual for Patient Monitor
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Figure 4.15 HR Trend Graph
Figure 4.15 is the ECG trend graph. There are 3 options on the right of the graph, as described below.
The “12” on the top shows the trend graph time. Move the cursor to the trend time, press the knob and
rotate the knob. The trend graph time will change to 24 or 96, which changes the horizontal axis to be 24 hours
or 96 hours. The corresponding trend graph also changes to 24-hour trend or 96-hour trend.
Af
ter choosing “Scan”, the trend graph display a triangle and a vertical line. This is a moving data marker.
As shown in the picture, when you move the marker to a specific point, the data area below the graph will
display the marker’s time, and its corresponding heart rate, SpO
2
. When rotating the knob to move the marker,
the moving interval is a changing value. The rule is as following: the initial step is 1. After you move towards the
same direction 5 times, the interval becomes 5, after 5 more steps, the interval becomes 10, and therefore it can
go to 20, 40.
No matter what your interval is, as soon as you move toward the other direction, the interval becomes 1 on
the other direction. Therefore, it is very easy to find the time you are looking for.
The last button is “Exit”. Move the cursor to the Exit button, and press the knob to return to the previous
level screen. The screen returned to is the Trend menu screen as shown in 4.14.
Please note that the max value on the vertical axis of the ECG is 120, not the max value of the ECG upper
limit. The scaled down graph provide better waveforms. When the ECG value exceeds 120, the vertical axis
max value will automatically change to 240. The three value to change to 0, 120, 240 from 0, 60, 120 for
reference. When system gets reset or the patient ID has changed, the vertical axis will return to its original value
of 0, 60, and 120. Other changes of vertical axis value in other trend graph are similar to that of ECG.
The Trend graph shows parameter value of the current time. For example, in the 12 hours trend graph,
when the monitoring time exceeds 12 hours, the trend graph will move toward the right and the data 12 hours
ago will be moved out of the graph. This ensures the screen always displays the current data for review. The
data moved out of the graph is not deleted, they are just hidden temporarily. When the time frame changes from
12 hours to 24 hours (while the monitoring time is less than 24 hours), the complete set of data will display.
Other trend graph follows the same rule.
The other trend graph are similar to that of ECG trend graph and we will not cover them in detail again.
Please note that for those trend graphs, the horizontal axis unit is number of time the blood pressure is
measured in stead of time.
