Masimo Radical Signal Extraction Návod k obsluze stáhnout pdf (Strana 33)

Radical Signal Extraction Pulse Oximeter Operator’s Manual 23

operation

successful SpO

monitoring

The following general points will aid in ensuring oximetry monitoring success.

■

Place the sensor on a site that has sufficient perfusion and provides proper

alignment of the LED’s and photodetector.

■

Place the sensor on a site that has unrestricted blood flow.

■

Do not constrict the monitoring site when securing a sensor with tape.

■

Do not select a site near potential electrical interference (electrosurgical unit, for

example).

■

Read the sensor Directions for Use for proper sensor application.

NUMERIC DISPLAY - SpO

Stability of the SpO

readings may be a good indicator of signal validity. Although stability

is a relative term, experience will provide a good feeling for changes that are artifactual or

physiological and the speed, timing, and behavior of each.The stability of the readings over

time is affected by the averaging mode being used.The longer the averaging time, the more

stable the readings tend to become. This is due to a dampened response as the signal is

averaged over a longer period of time than during shorter averaging times. However, longer

averaging times delay the response of the oximeter and reduce the measured variations of

SpO

and PR.

Inaccurate measurements may be caused by:

■

Significant levels of dysfunctional hemoglobin (e.g., carboxyhemoglobin or

methemoglobin).

■

Intravascular dyes such as indocyanine green or methylene blue.

■

Venous pulsations at the frequency of the patient’s arterial pulse.

■

Very low hemoglobin levels.

NUMERIC DISPLAY - PULSE RATE

The Pulse Rate displayed on the Radical may differ slightly from the heart rate displayed on

ECG monitors due to differences in averaging times. There may also be a discrepancy

between cardiac electrical activity and peripheral arterial pulsation. Significant differences

may indicate a problem with the signal quality due to physiological changes in the patient or

one of the instruments or application of the sensor or patient cable.The pulsations from intra-

aortic balloon support can be additive to the pulse rate displayed on the pulse oximeter .

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