Principles of Operation
N-600x Operator’s Manual
171
P r i n c i p l e s o f O p e r a t i o n
Overview
The N-600x uses pulse oximetry to measure functional oxygen
saturation in the blood. Pulse oximetry works by applying an
O
XI
M
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sensor to a pulsating arteriolar vascular bed, such as a finger or toe.
The
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sensor contains a dual light source and a photo detector.
Bone, tissue, pigmentation, and venous vessels normally absorb a
constant amount of light over time. The arteriolar bed normally
pulsates and absorbs variable amounts of light during the pulsations.
The ratio of light absorbed is translated into a measurement of
functional oxygen saturation (SpO
2
).
Because a measurement of SpO
2
is dependent upon light from the
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sensor, excessive ambient light can interfere with this
measurement.
Specific information about ambient conditions,
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sensor
application, and patient conditions is contained throughout this
manual.
Pulse oximetry is based on two principles: that oxyhemoglobin and
deoxyhemoglobin differ in their absorption of red and infrared light
(spectrophotometry), and that the volume of arterial blood in tissue
(and hence, light absorption by that blood) changes during the pulse
(plethysmography). A pulse oximeter determines SpO
2
by passing
red and infrared light into an arteriolar bed and measuring changes in
light absorption during the pulsatile cycle. Red and infrared
low-voltage light-emitting diodes (LED) in the oximetry
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M
AX
sensor serve as light sources; a photo diode serves as the photo
detector.
Summary of Contents for OXIMAX N-600X Series
Page 1: ......
Page 8: ...Contents vi...
Page 12: ...Safety Information 4 N 600x Operator s Manual...
Page 80: ...Using the Monitor 72 N 600x Operator s Manual...
Page 92: ...Using Monitor Trend Data 84 N 600x Operator s Manual...
Page 106: ...Using OXIMAX Sensor Event Records 98 N 600x Operator s Manual...
Page 118: ...Printing Monitor Trend Data 110 N 600x Operator s Manual...
Page 128: ...Using the Data Port 120 N 600x Operator s Manual...
Page 140: ...OXIMAX Sensors and Accessories 132 N 600x Operator s Manual...
Page 146: ...Performance Considerations 138 N 600x Operator s Manual...
Page 168: ...Troubleshooting 160 N 600x Operator s Manual...
Page 174: ...Using SatSeconds 166 N 600x Operator s Manual...
Page 178: ...Factory Default Settings 170 N 600x Operator s Manual...
Page 204: ...Specifications 196 N 600x Operator s Manual...
Page 210: ...Index 202 N 600x Operator s Manual...
Page 211: ......