Anesthesia Machine Guide for Open Circuit Gas Delivery
When surgery is performed above the xyphoid (upper chest), oxygen delivery around the face
poses a significant fire risk. For this reason, many organizations including ECRI, FDA, JCAHO,
APSF, ASA require that gas concentrations above 30% oxygen not be administered near the
patient’s face unless a sealed tracheal tube or laryngeal mask airway seals off the gas flow.
These guides explain how to set up the anesthesia machine when performing open circuit gas
delivery. Set up includes connecting a gas delivery system, setting gas flows, and configuring
monitors to assure patient safety.
Circuit Flow and Volume alarms are turned off for this application and CO2 is continuously
monitored and alarmed to assure the patient is breathing.
Aisys: Option 1
1. Start Case
1. Start Case
2&3. Default
Settings – Change
to Monitoring
Mode
2. Default Settings
3. Monitoring Mode
4. Start Case Now
4. Start
4. Air (8)/O2 (1)
Ratio
** Note Aisys
shows O2
percentage with
ratios other
5. Set Air and O2 Flows
machines do not
[Aisys computes
and displays
oxygen
concentration that
will be delivered to
the breathing
circuit. Value
changes as either
flow is adjusted.]
Aisys
computes
and
displays
30%
Aisys: Option 2
1. Alarms Set up
1. Alarms Setup
2. Adjust Settings –
Set MV(Minute
Volume) low alarm to
zero. This will keep
the unmonitored tidal
volume from being
analyzed to assess
breathing.
2. Adjust Settings
Set MV to Zero
Aestiva: Option 1
1. Use Auxiliary
Gas Flow Port
(enabled with green
lever) or use the
same circuit
configuration as
with the other
anesthesia
machines
1. Use Axillary
Aestiva: Option 2
1. Alarm Settings
(Press VE/VTE
Alarm button)
1. VE/VTE
2. Adjust Alarm
Settings – Set
MV(Minute
Volume) low alarm
to zero. This will
keep the
unmonitored tidal
volume from being
analyzed to assess
breathing.
Set MV to Zero
Apollo
1. Alarm Limits
1. Alarm Limits
2. Adjust Alarm
Limits – Set MV
(Minute Volume)
low alarm to zero.
This will keep the
unmonitored tidal
volume from being
analyzed to assess
breathing.
2. Set MV to zero
Fabius GS
1. Turn Off Volume
Alarm
Apnea Pressure is
off because
Man/Spont is set
OFF
2&3 Select Alarms
- Set MV (Minute
Volume) low alarm
to zero. This will
keep the
unmonitored tidal
volume from being
analyzed to assess
breathing.
OFF
2. Alarms
2. Set MV to zero
© 2012, BWH OR Biomedical Engineering - Catherine Weitenbeck, Ernst Daniel, James Philip, 2012-04-19