BeneVision N22/N19 Patient Monitor Operator’s Manual 10 - 17
10.7 ST Monitoring
ST monitoring is intended for adult, pediatric and neonatal patient.
10.7.1 ST Safety Information
• ST values may be affected by such factors as some drugs or metabolic and conduction disturbances.
• ST is often calculated with a fixed delay from the J point. Changes in heart rate may affect ST.
• The ST algorithm has been tested for accuracy of the ST segment data. The significance of the ST
segment changes need to be determined by a physician.
• This monitor provides ST level change information. The clinical significance of the ST level change
information should be determined by a physician.
10.7.2 Enabling ST Monitoring
The ST monitoring function is disabled by default. Before you start ST monitoring, enable the ST function. To do
so, follow this procedure:
1. Select the ECG numeric area or waveform area to enter the ECG menu.
2. Select the ST tab→ select the Setup tab.
3. Switch on ST Analysis.
Reliable ST monitoring can hardly be ensured in the following situations:
â– You are unable to get a lead that is not noisy.
â– Arrhythmias, such as atrial fib or flutter, cause irregular baseline.
â– The patient is continuously ventricularly paced.
â– The patient has left bundle branch block.
In these cases, you may consider switching off ST monitoring.
10.7.3 Displaying ST Numerics and Segments
To display ST numerics and Segments, follow this procedure:
1. Access Tile Layout by either of the following ways:
◆ Select the Screen Setup quick key → select the Tile Layout tab.
◆ Select Main Menu quick key → from the Display column select Tile Layout.
2. Click the numeric area where you want to display the ST numerics, and then select ST.
The display of ST parameters area is different according to the lead type:
â– When you are using the 3-lead ECG leadwires, the ST numeric area does not display. A ST value displays in
the ECG numeric area.
â– When you are using the 5-lead ECG leadwires, the ST numeric area displays 7 ST values: ST-I, ST-II, ST-III, ST-
aVR, ST-aVL, ST-aVF, ST-V.
â– When you are using the 6-lead ECG leadwires, the ST numeric area displays 8 ST values: ST-I, ST-II, ST-III, ST-
aVR, ST-aVL, ST-aVF, ST-Va, ST-Vb.
â– When you are using the 12-lead ECG leadwires, the ST numeric area displays12 ST values: ST-I, ST-II, ST-III,
ST-aVR, ST-aVL, ST-aVF, ST-V1, ST-V2, ST-V3, ST-V4, ST-V5, ST-V6.
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