20 Monitoring SpO2
Compatibility: Use only the accessories that are specified for use with this fetal monitor, otherwise
patient injury can result.
Proper Sensor Fit: If a sensor is too loose, it might compromise the optical alignment or fall off. If it
is too tight, for example because the application site is too large or becomes too large due to edema,
excessive pressure may be applied. This can result in venous congestion distal from the application site,
leading to interstitial edema, hypoxemia and tissue malnutrition. Skin irritations or lacerations may
occur as a result of the sensor being attached to one location for too long. To avoid skin irritations and
lacerations, periodically inspect the sensor application site and change the application site regularly.
Venous Pulsation: Do not apply sensor too tightly as this results in venous pulsation which may
severely obstruct circulation and lead to inaccurate measurements.
Ambient Temperature: At elevated ambient temperatures be careful with measurement sites that are
not well perfused, because this can cause severe burns after prolonged application. All listed sensors
operate without risk of exceeding 41°C on the skin if the initial skin temperature does not exceed
Extremities to Avoid: Avoid placing the sensor on extremities with an arterial catheter, an NBP cuff,
or an intravascular venous infusion line.
Connecting SpO2 Cables
Connect the sensor cable to the color-coded socket on the monitor. If you are using a disposable
sensor, plug the sensor into the adapter cable and connect this to the monitor. Connect reusable
sensors directly to the monitor.
Extension cables: Do not use more than one extension cable (M1941A). Do not use an extension
cable with Philips reusable sensors or adapter cables with part numbers ending in -L (indicates "long"
Electrical Interference: Position the sensor cable and connector away from power cables, to avoid