Spacelabs Healthcare 98000, Operation Manual

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Pathfinder SL v1.9 Operations Manual
4-6
4.7 Thresholds
From the Analysis menu open the Thresholds screen. The displays a graphical representation of
the analysis for all loaded channels. Across the bottom of the screen a yellow arrow indicates a
Trigger.
Before manually editing the settings channel by channel, test whether High / Medium / Low
Noise or Trigger Sensitivity icons on the toolbar resolve any issues.
For Noisy Recordings (artifact) set the Noise Sensitivity to High and the ECG Trigger Sensitivity to
Low.
For recordings with low ECG amplitude set the Noise Sensitivity to Low and the ECG Trigger
Sensitivity to High.
The Operator may:
• Forward: Apply the changes from the current point in the recording to the end
• All: Apply the changes from the beginning of the recording to the end
• Cancel: Not apply any changes
The screen is split into sections by channel. At the bottom of the screen the combined results from
all channels are displayed with their beat classifications.
For each channel the following is displayed across the screen.
ECG: The corresponding ECG for the current period
The Noise Threshold: Move the filter line down to exclude noise
ECG Trigger Threshold: Raise the ECG Trigger line up to include beats
To the left of each of the channels are slider bars, moving the arrows up and down for each channel will
enable to operator to overrule the analysis to exclude noise from the recording and include beats.
The operator can also use these thresholds to exclude unwanted beats.
Use the option to ‘Lock Sliders’ to have the same changes apply to all channel simultaneously.