Anesthesia Machine Guide for Open Circuit Gas Delivery (Aisys)

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 /
2&3. Default Settings – Change to Monitoring Mode /
4. Start Case Now /
4. Air (8)/O2 (1) Ratio
** Note Aisys shows O2 percentage with ratios other 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: Option 2

1. Alarms Set up /

2. Adjust Settings – Set MV(Minute Volume) low alarm to zero. This will keep the unmonitored tidal volume from being analyzed to assess breathing. /

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 /

Aestiva: Option 2

1. Alarm Settings (Press VE/VTE Alarm button) /
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. /

Apollo

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. /

Fabius GS

1. Turn Off Volume Alarm
Apnea Pressure is off because Man/Spont is set /
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. /