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System Configuration
Accessories - Optional
SpO
2
Module
The SpO
2
Module is an optional accessory that may be ordered for use with the Starling Monitor,
if required.
Pulse oximetry is a non-invasive method allowing the monitoring of the arterial oxygen
saturation of a patient's hemoglobin.
A sensor is placed on a thin part of the patient's body, usually a fingertip or earlobe, or in the
case of an infant, to the foot or forehead. Light with red wavelengths and infrared wavelengths
is sequentially passed from the light (photo) emitter to the photo detector on the other side.
Measuring the change in the absorbance of each of the two wavelengths allows determination
of the absorbance due to the pulsing arterial blood alone, excluding venous blood, skin, bone,
muscle, fat, and (in most cases) fingernail polish. Based upon the ratio of changing blood
absorbance of the red and infrared light, a measure of oxygenation (SpO
2
- the percent of
hemoglobin molecules bound with oxygen molecules) can be made.
The SpO
2
Module is supplied with a dedicated SpO
2
cable (Figure 2-12). One end of the cable
has an integrated connector designed for connection to the SpO
2
cable connection socket on
the Monitor side panel. The other end has a pre-connected SpO
2
sensor inside a finger clip,
for attachment to the patient.
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