User Manual for Vital Signs Monitor
11
Figure 3.4 Cuff Placement
PC-900 Vital Signs Monitor can resist against defibrillator and electrosurgical unit. Readings may be
inaccurate for a short time after or during using defibrillator or electrosurgical unit.
Transient caused by cable circuitry blocks while monitoring may be similar to the real heartbeat
waveform, as a result resistance heart rate alarm rings. If you put the electrodes and cable in
proper places according to this manual’s instructions and the instructions for using electrode, the
chance of this transient occurring will be decreased.
Besides the improper connection with electrosurgical unit may cause burns, the monitor may be
damaged or arouse deviations of measurement. You can take some steps to avoid this situation,
such as do NOT use small ECG electrodes, choosing the position which is far away from the
estimated Hertzian waves route, using larger electrosurgical return electrodes and connecting with
the patient properly.
ECG leads may be damaged while using defibrillator. If the leads are used again, please do the
functional check first.
When removing the ECG cable, hold the head of the connector and pull it out.
When the monitor is inoperable due to an overload or saturation of any part of the amplifier, it
will prompt “Lead off” to remind operator.
No predictable hazard will be caused by the summation of leakage currents when several item of
monitor are interconnected.
3.3.2 Blood Pressure Cuff Connection
1. Connect the cable to the right-panel connector marked with the NIBP icon.
2. Unveil and wrap the cuff around patient’s upper arm.
Requirements of the cuff:
1) Appropriate cuff should be selected according to the age of the subject. Its width should be 2/3 of the
length of the upper arm. The cuff inflation part should be long enough to permit wrapping 50-80% of
the limb concerned.
Note: The size of the cuff selected should suit the subjects while measuring.
When putting on the cuff, unveil and wrap it around the upper arm evenly to appropriate
tightness.
2) Remember to empty the residual air in the cuff before the measurement is commenced.
3) Locate the cuff in such a way that the “φ” mark is at a location where the clearest pulsation of
brachial artery is observed.
4) The cuff should be tightened to a degree where insertion of one finger is allowed.
5) The lower end of the cuff should be 2cm above the elbow joint.