Rad-57 Signal Extraction Pulse CO-Oximeter Operator’s Manual
4-9
4
Operation
Actions to be Taken
If the SpO
2
readings show significant differences, do the following:
■ Make sure the emitter and photodetector are aligned directly opposite each other.
■ Select a site where the distance between the emitter and photodetector is minimized.
■ Wipe the sensor site with a 70% isopropyl alcohol pad or rubefacient cream (10-30% methyl
salicylate and 2-10% menthol) and allow to dry for 20-30 seconds. Strong vasodilator creams,
such as nitroglycerin paste, are not recommended.
■ If possible, remove electrical noise sources such as electrosurgical units or other electrical/
electronic equipment.
■ If artificial nails or excessive fingernail polish are present, select another site or remove the
polish/artificial nails.
■ If possible, ensure that the sensor is placed in a location with low ambient light.
CAUTION: IF ANY MEASUREMENT SEEMS QUESTIONABLE, FIRST CHECK THE PATIENT’S VITAL
SIGNS BY ALTERNATE MEANS AND THEN CHECK THE PULSE CO-OXIMETER FOR PROPER
FUNCTIONING.
Sensitivity
Three sensitivity levels enables a clinician to tailor the response of the Rad-57 to the needs of the
particular patient situation. They are as follows:
■ Normal Sensitivity – This is the recommended mode for typical monitoring purposes. It is
advisable for care areas where patients are observed frequently, such as ICU’s.
■ Adaptive Probe Off Detection (APOD™) – This is the recommended monitoring mode where
there is a high probability of the sensor becoming detached. It is also the suggested mode
for care areas where patients are not visually monitored continuously. This mode delivers
enhanced protection against erroneous pulse rate and arterial oxygen saturation readings
when a sensor becomes inadvertently detached from a patient due to excessive movement.
■ Maximum Sensitivity (MAX) - This mode is recommended for patients with low perfusion or
when the low perfusion message is displayed on the screen in APOD or normal sensitivity
mode. This mode is not recommended for care areas where patients are not monitored
visually, such as general wards. It is designed to interpret and display data at the measuring
site when the signal may be weak due to decreased perfusion. When a sensor becomes
detached from a patient, it will have compromised protection against erroneous pulse rate and
arterial saturation readings
CAUTION: WHEN USING THE MAXIMUM SENSITIVITY SETTING, THE PERFORMANCE OF THE
SENSOR OFF DETECTION MAY BE COMPROMISED. IF THE INSTRUMENT IS IN
THIS SETTING AND THE SENSOR BECOMES DISLODGED FROM THE PATIENT, THE
POTENTIAL FOR FALSE READINGS MAY OCCUR DUE TO ENVIRONMENTAL ‘NOISE’
SUCH AS LIGHT, VIBRATION AND EXCESSIVE AIR MOVEMENT.
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