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Chapter 11
Pulse Oximetry
Overview
Pulse Oximetry allows noninvasive monitoring of arterial blood oxygen saturation. Fiber
optic oximetry sensors are used to transmit pulses of red and infrared light through the
animal's peripheral vascular region. Oxygen saturation is determined by measuring the
differential absorption of the red and infrared light. In addition to oxygen saturation, the
module measures the cardiac plethysmogram waveform, generates a plethysmogram
gate, measures pulse distension and the animal's heart rate.
Oximeter components and connections
The Pulse Oximeter Module is located next to the magnet bore and near the IBP or
other optional modules. The module receives and sends data to and from the ERT
Control/Gating Module using fiber optic communication cables. It receives power from a
dedicated 12V supply or from a daisy chain cable if other options are also in use.
If the Oximeter Module is the only option in use, it connects to the ERT Control/Gating
Module using a duplex fiber optic communication cable.
The cable should be
connected to the fiber optic ports labeled "option in" and "option out" and the options I/O
switch should be set to "options in use". When other optional modules are also present,
the modules connect to form a data loop with one of the duplex fibers connecting to the
Revision C, August 2013
11-1
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