Product Manual

Patient Monitor User Manual Monitoring ECG
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main screen.
NOTE:
1 ST-segment analysis is intended for use with adult patients only and is not clinically
validated for use with neonatal and pediatric patients. For this reason, the
recommended and default setting for ST analysis in neonatal and pediatric modes is
Off.
2 In ST analysis, the obtained ST value and ST template are all unaffected by the
selected filter mode. ST algorithm itself uses a dedicated linear filter to ensure the
signal is not distorted, and to better ensure the consistent and accurate
measurement value and ST template can be obtained in different filter modes. If the
doctor wants to observe the waveform to evaluate ST segment result, it is
recommended to use the ST template for observation, as it is not affected by the filter
mode. If the real-time waveform displayed on the interface is used to evaluate ST
segment result, it is recommended to select Diagnosis mode.
3 Reliable ST monitoring may be influenced in following situations:
 You are unable to get a lead with low noise.
 If there is arrhythmia such as atrial fibrillation/flutter, the ECG baseline may be
irregular.
 The patient is continually performing ventricular paced.
 The dominant template cannot be obtained for a long time.
 The patient has left bundle branch block.
When any of above situations happens, ST monitoring should be switched off.
4 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 clinician.
5 If you use ST analysis, you must adjust the ST measurement point when you start
the monitor. If the patient's heart rate or ECG waveform changes significantly, this
will affect the size of the QT interval, so the ST point must be placed. If the
equipotential or ST points are not set correctly, the ST fragments of the artifacts may
be depressed or raised. Always ensure that the ST measurement point is suitable for
your patient.
6 ST values may be affected by such factors as some drugs or metabolic and
conduction disturbances.
7 ST is calculated with a fixed delay from the R position. Changes in heart rate or the
width of QRS may affect ST.
8 If the algorithm triggers self-learning (either manually or automatically), the
calculation of ST segment will be reinitialized.
9.8.1 Setting ST Analysis
To change ST analysis, please select ECG Setup > ST Analysis, then select On or Off from the
pop-up list.