Covidien SomaSensor Instructions D'emploi page 3

Adult Single-Use Regional Oxygen Saturation Sensor (English GB) Page 2
Cerebral Site Selection: Select sensor site on the right and left side of forehead. Placement of the sensor in other
cerebral locations, or over hair, may cause inaccurate readings, erratic readings, or no readings at all. Do not
place the sensor over nevi, sinus cavities, the superior sagittal sinus, subdural or epidural hematomas or other
anomalies such as arteriovenous malformations, as this may cause readings that are not reflective of brain tissue
or no readings at all.
Somatic Site Selection: Select sensor site over tissue area of interest (site selection will determine which body
region is monitored). Avoid placing the sensor over thick fatty deposits, hair or bony protuberances. Do not place
the sensor over nevi, hematomas or broken skin, as this may cause readings that are not reflective of tissue or no
readings at all. When two somatic site sensors are placed, they must be connected into the same preamplifier.
Sensor location is at the clinician's discretion, provided it adheres to the criteria noted on this Instruction For Use.
Placements may include:
 Over the spine (upper and lower)
 On the lateral or posterior calf
 The upper arm or leg
 On the forearm
 On the chest
Patient Prep: Remove any moisture or perspiration from the patient's skin with a dry gauze pad. Then, degrease
the skin. Ensure patient's skin is completely dry and remove degreaser residue, if any, with a dry gauze pad.
Sensor Placement: Remove the protective backing label from the adhesive side of the sensor and apply to the
skin. Continue applying the sensor by smoothing it to the skin from the center outward. Ensure edges of the
sensor are sealed to prevent light from entering.
Monitoring: Plug the sensor into the cable connector. Secure the sensor cable to a fixed object to avoid strain on
the sensor-to-skin interface using the strain-relief clips. Ensure the reusable cable is properly inserted into the
preamplifier. Calibration is automatic and monitoring will begin in seconds.
Status messages on the INVOS System display will appear if monitoring conditions are compromised. Check the
sensor periodically to assess skin integrity and the security of sensor placement. Always ensure sensor is properly
sealed to skin to avoid light entering. For extended monitoring, Covidien recommends using a new sensor
every 24 hours or if adhesive is inadequate to seal the sensor to the skin.