Masimo Rad-87, Руководство оператора

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4-6 Rad-87 Pulse CO-Oximeter Operator’s Manual
NUMERIC DISPLAY - PULSE RATE
The Pulse Rate displayed on the Rad-87 Pulse CO-Oximeter 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 cause the pulse rate displayed
on the Rad-87 to be significantly different than the ECG heart rate.
NUMERIC DISPLAY - SpCO
A stable SpCO reading is associated with correct sensor placement, small physiological
changes during the measurement and acceptable levels of arterial perfusion in the patient’s
measurement site. Physiological changes at the measurement site are mainly caused by
fluctuations in the arterial oxygen saturation, blood concentration and perfusion.
Inaccurate measurements may be caused by:
■
Levels of methemoglobin approximately 1.5% or above.
■
Intravascular dyes such as indocyanine green or methylene blue.
■
Abnormal hemoglobin levels.
■
Low arterial perfusion.
■
Low arterial oxygen saturation levels.
■
Elevated Total Bilirubin levels.
■
Motion artifact.
NUMERIC DISPLAY - SpMet
A stable SpMet reading is associated with correct sensor placement, small physiological
changes during the measurement and acceptable levels of arterial perfusion in the patient’s
measurement site. Physiological changes at the measurement site are mainly caused by
fluctuations in the arterial oxygen saturation, blood concentration and perfusion.
Inaccurate measurements may be caused by:
■
Intravascular dyes such as indocyanine green or methylene blue.
■
Low arterial perfusion.
■
Low arterial oxygen saturation levels.
■
Elevated Total Bilirubin levels.
■
Motion artifact.
NUMERIC DISPLAY - PI
The perfusion index (PI) display and bar graph indicator provide a relative numeric indica-
tion of the pulse strength at the monitoring site. It is a calculated percentage between the
pulsatile signal and non-pulsatile signal of arterial blood moving through the site. PI may
be used to find the best perfused site and to monitor physiological changes in the patient.
It displays an operating range of 0.02 percent to 20.00 percent. A percentage greater than
1.00 percent is desired. Extreme changes in the display number are due to motion artifact
and changes in physiology and blood flow.
o p e r a t i o n
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