Mallinckrodt NPB-190 Operator's Manual download pdf (Page 12)

Introduction

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).

Note: For an explanation of functional versus fractional

saturation, refer to Principles of Operation.

Because a measurement of SpO

2 is dependent upon light from the

sensor, excessive ambient light can interfere with this

measurement.

Specific information about ambient environmental conditions,

sensor application, and patient conditions is contained throughout

this manual.

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Mallinckrodt NPB-190 Operator's Manual Page 12