User Manual
3
Chapter 2 Security Notice
2.1 The power supply should be grounded properly before operation.
2.2 If the ground cable is not integrated, the device must be run with built-in power supply.
2.3 Please pull out power supply plug before changing the fuse.
2.4 This device must be operated and preserved by professional personnel.
2.5 The operator must read this user manual carefully before operation, and operate the device
according to operation regulation strictly.
2.6 The design of this device has mature consideration of security, but operator should never
neglect attention to device state and patient’s situation.
2.7 Please turn off the instrument and pull out power supply plug before clean and disinfection.
2.8 Please don’t operate this device in environment which contains flammable anaesthesia gas.
2.9 If this device is used with cardiac defibrillator or other electric stimulate devices at the same
time,
please choose Ag/AgCl chloride chest electrode and ECG lead with prevent-fibrillation function.
To
prevent the metal electrode burn patients' skin, the disposable chest electrode should be used if
the
defibrillation time is over 55 seconds. It is better that do not use this device with other electric
stimulate devices at the same time. If it must be used at the same time, there must be
professional technician guide on the scene.
2.10 When other devices are connected with this ECG instrument, they must be Type I devices
which accord with IEC60601-1. Because the total amount of leakage current may hurt patients,
the monitoring of leakage current is carried out and taken charge by connect devices.
2.11 Following descriptions concern special attentions in ECG measurement and interpretation.
(1) P wave and Q wave are not always reliable in the archive of intensive muscle artifact or AC
interference. So are the ST segment and T wave.
(2) Winding and unclear ends of S wave and T wave may lead to tolerance in measurement.
(3) In archive R wave is left out due to the low voltage of QRS wave or any leads falling off, the
measured heart rate may deviate greatly from the correct one.
(4) Axis calculation and identify the QRS borderline are not always reliable in the archive of the
low voltage of QRS wave.
(5) Occasionally, frequent ventricular premature complexes may be identified as dominant
beat.
(6) Merging of versatile arrhythmia may result in untrustworthy measurement because of the
difficulty in distinguishing P wave in such situation.
(7) ECG300G is designed to carry on ECG trace interpretation immediately after the
measurement. It is this interpretation that does not give report on all possible heart
problems and may sometimes not comply with the doctor’s diagnosis. Therefore, the final
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