Recommendation Table 4.

Recommendations for security and control of gas supply

Recommendations	Class a	Level b	Ref c
It is recommended that continuous piped supplies of oxygen, air and carbon dioxide be checked before and monitored during CPB with backup cylinder supplies available.	I	C	-
Monitoring of all incoming and outgoing gases should be considered.	IIa	C	-
When a supply system for volatile anaesthetic agents is used, a scavenging system at the oxygenator outlet is recommended.	I	C	-

CPB: cardiopulmonary bypass.

^aClass of recommendation.

^bLevel of evidence.

^cReferences.