User's Manual Part 3

10-14
E. Internal CO2 Only, and Masimo Multi-Gas Systems Detail Operation
The 3880 MRI Patient monitoring system has two options for gas measurement. There being a
‘built in’ CO2/Respiration only option and an externally packaged Multi-Gas option with full
automatic anesthetic agent identification as well as ‘fast’ parametric O2, known as P/N 3886.
The ‘built in’ CO2 only option is housed within the 3880 monitor unit and operable to the full
magnetic limits of the 3880 monitor unit, 30,000 Gauss. Using the Parameter Setup menu, the
user can select CO2 only which will activate this internal CO2 unit and display CO2 waveform,
Et and Fi CO2 as well as respiration this internal unit measures.
Likewise, from the Parameters Setup menu the operator can select Agents which turns off the
internal CO2 only unit and causes the 3880 monitor unit to communicate with the external 3886
Multi-Gas unit. The 3880 now displays CO2 waveform, Et and Fi CO2, respiration, anesthetic
agents, N2O, and 02 from the 3886 unit. The core of the 3886 is the Masimo/Phasein ISA
sidestream OR+ Multi-Gas system which includes the Servomex Pm1116 Fast Oxygen
transducer. These devices have a long history of successful deployment in various non-MRI
monitors. The 3886 unit, provides magnetic and RF shielding allowing use in MR with magnetic
fields up to 600 Gauss, as such the 3886 is to be mounted on the MR gas machine or other
fixed position below 600 Gauss.
Terms and definitions
Specific terms and definitions used in this manual and explained below:
Term
Explanation
AA
Anesthetic Agent
BTPS
Body Temperature and Pressure Saturated
delay time
The delay time is defined as the time required for
a step function change at the sampling site to
result in 10% of the final va l ue
Et cone.
End-tidal (expired) concentration
Fi cone.
Inspired gas concentration
harmful
substances
Substances introduced in the patient circuit to an
amount that may cause harm to substances
the patient
ICU
Intensive Care Unit
LEG!
Light Emitting Gas Inlet. Status indicator
integrated in the gas sample inlet port
MAC value
1 MAC (Minimum Alveolar Concentration) is the
alveolar concentration (end-tidal) of the agent at
which 50% of individuals fail to move in
response to a noxious or surgical stimulus
MOD
Medical Device Directive
MRI
Magnetic Resonance Imaging