Operator's Manual

Table Of Contents
BeneVision N1 Patient Monitor Operator’s Manual 11 - 3
Electrosurgery equipment
Defibrillation (may cause inaccurate reading for a short amount of time)
Excessive patient/sensor motion
Electromagnetic field
Arterial catheters and intra-aortic balloon
Others
Inappropriate positioning of the SpO
2
sensor, or use of incorrect SpO
2
sensor
Cuff or arterial blood pressure measurement device on the same limb as the SpO
2
sensor.
11.4 SpO
2
Display
NOTE
PI is only available for Mindray SpO
2
and Masimo SpO
2
.
11.5 Preparing for SpO
2
Monitoring
To prepare to monitor SpO
2
, follow this procedure:
1. Select an appropriate sensor according to the module type, patient category and weight.
2. Clean the contact surface of the reusable sensor.
3. Remove colored nail polish from the application site.
4. Apply the sensor to the patient according to the instruction for use of the sensor.
5. Select an appropriate extension cable according to the connector type and plug the cable into the SpO
2
connector.
6. Connect the sensor to the extension cable.
CAUTION
Do not apply sensor too tightly as this results in venous pulsation which may severely obstruct
circulation and lead to inaccurate measurements.
( 1 )
( 2 )
( 3 )
( 4 )
( 5 )
(1) Pleth waveform (Pleth): visual indication of patient’s pulse. The waveform is not normalized.
(2) Oxygen saturation of arterial blood (SpO
2
): percentage of oxygenated hemoglobin in relation to the sum of
oxyhemoglobin and deoxyhemoglobin.
(3) Perfusion indicator: the pulsatile portion of the measured signal caused by arterial pulsation.
(4) Pulse rate (derived from the pleth wave): detected pulsations per minute.
(5) Perfusion index (PI): gives the numerical value for the pulsatile portion of the measured signal caused by arterial
pulsation. PI is an indicator of the pulsatile strength. You can also use it to assess the SpO
2
signal strength.
Above 1 is optimal.
Between 0.3 and 1 is acceptable.
Below 0.3 indicates low perfusion. Set Sensitivity to Maximum first. Reposition the SpO
2
sensor
or find a better site. If low perfusion persists, choose another method to measure oxygen
saturation if possible.